Magnesium hydroxide medical facts from Drugs.com Support Group Q & A What is magnesium hydroxide? Magnesium is a naturally occurring mineral. Magnesium is important for many systems in the body especially the muscles and nerves. Magnesium hydroxide also reduces stomach acid, and increases water in the intestines which may induce defecation. Magnesium hydroxide is used as a laxative to relieve occasional constipation (irregularity) and as an antacid to relieve indigestion, sour stomach, and heartburn. Magnesium hydroxide may also be used for purposes not listed in this medication guide. What is the most important information I should know about magnesium hydroxide? Do not use magnesium hydroxide without a doctor's advice if you have stomach pain, nausea, or vomiting. Slideshow Call your doctor at once if you have if you have a sudden change in bowel habits that persists over a period of 2 weeks. Do not use magnesium hydroxide for longer than 7 days without medical advice. What should I discuss with my healthcare provider before taking magnesium hydroxide? Do not use magnesium hydroxide without a doctor's advice if you have stomach pain, nausea, or vomiting.

Ask a doctor or pharmacist if it is safe for you to take this medicine if you have other medical conditions, especially kidney disease. It is not known whether magnesium hydroxide will harm an unborn baby. Ask a doctor before using this medicine if you are pregnant. It is not known whether magnesium hydroxide passes into breast milk or if it could harm a nursing baby. Ask a doctor before using this medicine if you are breast-feeding a baby. How should I take magnesium hydroxide? Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. The chewable tablet must be chewed before you swallow it. Measure liquid medicine with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one. You may need to shake the oral suspension before each use. Do not use magnesium hydroxide for longer than 7 days without medical advice. Call your doctor at once if you have if you have a sudden change in bowel habits that persists over a period of 2 weeks. Store at room temperature away from moisture and heat. What happens if I miss a dose?

Since magnesium hydroxide is used when needed, you may not be on a dosing schedule. If you are on a schedule, use the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not use extra medicine to make up the missed dose. What happens if I overdose? Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. Overdose symptoms may include severe diarrhea, muscle weakness, mood changes, slow or irregular heartbeats, and little or no urinating. What should I avoid while taking magnesium hydroxide? Follow your doctor's instructions about any restrictions on food, beverages, or activity. Magnesium hydroxide side effects Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using magnesium hydroxide and call your doctor at once if you have: rectal bleeding; no bowel movement after using the medicine as a laxative; severe nausea, vomiting; Usual Adult Dose for Constipation: Oral liquid: 30 to 60 mL orally once a day or in divided doses. Chewable tablet: 8 tablets orally once a day or in divided doses. Usual Adult Dose for Dyspepsia: Oral liquid: Initial dose: 5 to 15 mL orally 1 to 4 times a day as needed. Alternatively, 1 to 3 oral tablets 1 to 4 times a day as needed. Chewable tablet: 2 to 4 tablets orally every 4 hours as needed up to 4 times in a 24 hour period. Usual Pediatric Dose for Constipation: Oral liquid: 1 year or less: 0.5 mL/kg per dose. 2 to 5 years: 5 to 15 mL orally once a day or in divided doses. 6 to 12 years: 15 to 30 mL orally once a day or in divided doses.

13 to 18 years: 30 to 60 mL orally once a day or in divided doses. Chewable tablet: 3 to 5 years: 2 tablets orally once a day or in divided doses. 6 to 11 years: 4 tablets orally once a day or in divided doses. 12 to 18 years: 8 tablets orally once a day or in divided doses. Usual Pediatric Dose for Dyspepsia: Chewable tablet: 12 to 18 years: 2 to 4 tablets orally every 4 hours up to 4 times in a 24 hour period. What other drugs will affect magnesium hydroxide? Other drugs may interact with magnesium hydroxide, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using. Where can I get more information? Your pharmacist can provide more information about magnesium hydroxide. Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects.

If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist. Copyright 1996-2012 Cerner Multum, Inc. Version: 4.05. Last reviewed: December 09, 2016 Date modified: January 10, 2017 Drug Status magnesium hydroxide oral : Uses, Side Effects, Interactions, Pictures, Warnings & Dosing - WebMD 2 Uses This medication is used for a short time to treat occasional constipation . It is a laxative (osmotic-type) that is thought to work by drawing water into the intestines , an effect that helps to cause movement of the intestines . This medication is also used to treat symptoms caused by too much stomach acid such as heartburn , upset stomach , or indigestion . It is an antacid that works by lowering the amount of acid in the stomach . How to use magnesium hydroxide Take this product by mouth as directed. For the chewable form, chew thoroughly before swallowing. For the liquid form, shake the bottle well before each dose. Carefully measure the dose using a special measuring device/spoon.

Do not use a household spoon because you may not get the correct dose. If you are taking this medication for constipation , drink a full glass of water (8 ounces or 240 milliliters) with each dose. Follow all directions on the product package, or use as directed by your doctor. If you are uncertain about any of the information, consult your doctor or pharmacist. Dosage is based on your medical condition and response to treatment. Extended use or overuse of this medication for constipation may result in dependence on laxatives and ongoing constipation. Overuse may also cause persistent diarrhea , loss of too much body water ( dehydration ), and mineral imbalances (e.g., high magnesium ). Tell your doctor if your condition persists or worsens. For constipation problems, it may take 30 minutes to 6 hours to produce a bowel movement . Tell your doctor if this product does not produce a bowel movement , if you need to use this medication or other laxative products regularly for more than 1 week, or if you have rectal bleeding . For stomach acid problems, do not take the maximum dose of this medication for more than 2 weeks unless directed by your doctor.

If you think you may have a serious medical problem, seek immediate medical attention. Side Effects Diarrhea may occur. If this effect persists or worsens, tell your doctor or pharmacist promptly. If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if any of these unlikely but serious side effects occur: symptoms of high magnesium levels (e.g., muscle weakness , slow/ irregular heartbeat , slow/shallow breathing, mental/mood changes such as confusion), symptoms of dehydration (e.g., decreased urination, dizziness , extreme thirst, very dry mouth ), stomach/ abdominal pain , bloody stools , rectal bleeding. A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction , including: rash , itching /swelling (especially of the face/ tongue /throat), severe dizziness, trouble breathing . This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects.

You may report side effects to FDA at 1-800-FDA-1088 or at In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345. List magnesium hydroxide side effects by likelihood and severity. Precautions Before taking magnesium hydroxide, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies . This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease , appendicitis or symptoms of appendicitis (e.g., stomach/abdominal pain, nausea/ vomiting ), magnesium-restricted diet, sudden change in bowel habits that lasts for longer than 2 weeks. During pregnancy , this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. It is not known whether this drug passes into breast milk. Consult your doctor before breast -feeding. What should I know regarding pregnancy, nursing and administering magnesium hydroxide to children or the elderly?

Interactions Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions . Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: raltegravir, sodium polystyrene sulfonate. Magnesium hydroxide can decrease the absorption of other drugs such as dasatinib, delavirdine , atazanavir, gabapentin, digoxin, mycophenolate, phosphate supplements (e.g., potassium phosphate), tetracycline antibiotics (e.g., doxycycline , minocycline ), certain azole antifungals ( ketoconazole , itraconazole ), and quinolone antibiotics (e.g., ciprofloxacin , levofloxacin ). Therefore, separate your doses of these medications as far as possible from your doses of magnesium hydroxide.

Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will work with all your medications. Does magnesium hydroxide interact with other medications? Overdose If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: severe/persistent diarrhea, muscle weakness, mental/mood changes (e.g., confusion), slow/irregular heartbeat, decreased urination, dizziness. Notes Keep all regular medical and laboratory appointments. Lifestyle changes such as regular exercise and diet changes (e.g., drinking enough water, eating a proper diet with fiber-rich foods such as bran, fresh fruits/vegetables) may prevent or relieve constipation. Lifestyle changes such as stress reduction programs, stopping smoking, limiting alcohol, and diet changes (e.g., avoiding caffeine/certain spices) may help to reduce heartburn and other stomach acid problems. Talk to your doctor or pharmacist about lifestyle changes that might benefit you.

Missed Dose Not applicable. Storage Store at room temperature away from light and moisture. If you have any questions about storage, ask your pharmacist. Do not store in the bathroom. Keep all medicines away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product. Information last revised July 2016. Copyright(c) 2016 First Databank, Inc. Images Sorry. No images are available for this medication. Add to Cabinet Add Adderall to my medicine cabinet. I am Reaction of a Suspension of Magnesium Hydroxide with a Weak Acid (Milk of Magnesia) | Chemistry Lecture Demonstration (CLD) Facility Chemistry Lecture Demonstration (CLD) Facility Reaction of a Suspension of Magnesium Hydroxide with a Weak Acid (Milk of Magnesia) Brief Description: A solution of milk of magnesia and universal indicator in water is stirred while acetic acid is added. The indicator changes color as the acid is neutralized.

As the suspended solid is consumed, the solution becomes clear. Purpose/Goal: Procedure demonstrates the neutralizing effect of magnesium hydroxide on an acid, color change of indicators with pH, and vividly illustrates how a commercial antacid works. Explanation of Experiment: Magnesium hydroxide reacts with acid to form water and magnesium ions: Mg(OH)2 (s) + 2 H3O+ (aq) = 4 H2O (l) + Mg2+ (aq) Indicators are substances which have distinctly different colors in acidic or basic media. An insoluble base in water dissolves in the presence of acid. Milk of Magnesia has a neutralizing effect on stomach acid – this experiment shows its effects. Materials Preparation: Milk of Magnesia – any brand should work - primary ingredient should be magnesium hydroxide - Mg(0H)2. Universal Indicator - available from any chemical supplier. Vinegar (ca. 5% acetic acid)- available from any grocery store. Magnetic stirring bar and stirring plate, preferably lighted from below.

Beaker – 500 or 1000 mL Presentation: Place about 100 mL of Milk of Magnesia in a 500 mL beaker and dilute with tap water until the beaker is about half full. Add about 10 mL of Universal Indicator. The Universal Indicator will turn red on the far acidic end of the scale and dark blue on the alkaline side. Use the lighted magnetic stirrer to create a steady mix of the liquids. Observe that the solution turns a light blue, indicating that it is slightly basic due to the small amount of dissolved Mg(OH)2. While stirring the solution, add 10-20 mL of vinegar (depending on your setup) and observe the rapid color change. The mixture quickly changes to red because the acid disperses throughout the beaker. The acid neutralizes the small amount of hydroxide ion from the Mg(0H)2 that has dissolved first, then turns the solution acidic. However, as more of the Mg(0H)2 from the suspension gradually dissolves into solution, the acid is neutralized and eventually the solution becomes basic.

Add more vinegar and watch as the liquid goes from red to orange to yellow to green and eventually settles at the bluish-purple color. The mixture changes through the entire Universal Indicator color range. In time, all of the vinegar (acid) will react with the magnesium hydroxide and the solution will remain red and clear. Hazards: Vinegar can cause skin irritation. Avoid vigorous solution stirring to prevent spillage. As with all demonstrations, appropriate safety goggles, gloves and lab attire should be used. Disposal: Solutions produced may be flushed down the drain with copious amounts of water. Video: Aluminum Hydroxide and Magnesium Hydroxide: MedlinePlus Drug Information Aluminum Hydroxide and Magnesium Hydroxide URL of this page: Aluminum Hydroxide and Magnesium Hydroxide pronounced as (a loo' mi num) (hye drox' ide) (mag nee' zhum) (hye drox' ide) Brand names of combination products Why is this medication prescribed? Aluminum Hydroxide, Magnesium Hydroxide are antacids used together to relieve heartburn, acid indigestion, and upset stomach.

They may be used to treat these symptoms in patients with peptic ulcer, gastritis, esophagitis, hiatal hernia, or too much acid in the stomach (gastric hyperacidity). They combine with stomach acid and neutralize it. Aluminum Hydroxide, Magnesium Hydroxide are available without a prescription. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information. How should this medicine be used? This medication comes as a chewable tablet and liquid to take by mouth. Chew tablets thoroughly; do not swallow them whole. Drink a full glass of water after taking the tablets. Shake the oral liquid well before each use to mix the medicine evenly. The liquid may be mixed with water or milk. Follow the directions on the package label or on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Aluminum Hydroxide, Magnesium Hydroxide antacids exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Do not take antacids for more than 1 to 2 weeks unless prescribed by your doctor. What special precautions should I follow?

Before taking Aluminum Hydroxide, Magnesium Hydroxide antacids, tell your doctor and pharmacist if you are allergic to Aluminum Hydroxide, Magnesium Hydroxide antacids or any other drugs. tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially aspirin, cinoxacin (Cinobac), ciprofloxacin (Cipro), digoxin (Lanoxin), diazepam (Valium), enoxacin (Penetrex), ferrous sulfate (iron), fluconazole (Diflucan), indomethacin, isoniazid (INH), itraconazole (Sporanox), ketoconazole (Nizoral), levofloxacin (Levaquin), lomefloxacin (Maxaquin), nalidixic acid (NegGram), norfloxacin (Noroxin), ofloxacin (Floxin), sparfloxacin (Zagam), tetracycline (Achromycin, Sumycin), and vitamins. If your doctor tells you to take antacids while taking these medications, do not take them within 2 hours of taking an antacid.

tell your doctor if you have or have ever had kidney disease. tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking Aluminum Hydroxide, Magnesium Hydroxide antacids, call your doctor. What special dietary instructions should I follow? If you are taking this medication for an ulcer, follow the diet prescribed by your doctor carefully. What should I do if I forget a dose? If you are taking scheduled doses of Aluminum Hydroxide, Magnesium Hydroxide, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one. What side effects can this medication cause? Side effects from Aluminum Hydroxide, Magnesium Hydroxide are not common. To avoid the chalky taste, take with water or milk. Tell your doctor if any of these symptoms are severe or do not go away: diarrhea Patent US3393976 - Preparation of magnesium hydroxide by treating dolomite with magnesium ...

- Google Patents Claims available in Description (OCR text may contain errors) United States Patent PREPARATION OF MAGNESIUM HYDROXIDE BY TREATING DOLOMITE WITH MAGNESIUM NI- TRATE SOLUTHON Lloyd M. Housh, Santa Clara, Calif., assignor to Kaiser Aluminum & Chemical Corporation, Oakland, Calif., a corporation of Delaware No Drawing. Filed Nov. 8, 1965, Ser. No. 506,838 Claims. (Cl. 23-201) ABSTRACT OF THE DISCLOSURE A method of recovering magnesia values from dolomite comprising reacting the dolomite with a magnesium nitrate solution to form magnesium hydroxide and calcium nitrate, followed by reacting the calcium nitrate with further dolomite and carbon dioxide to form calcium carbonate and regenerate the magnesium nitrate solution. This invention concerns the production of magnesium hydroxide, Mg(OH) and particularly a method of producing it from dolomite. Magnesium hydroxide is a useful material in its own right, for example, as the familiar milk of magnesia.

Perhaps more important, however, is its use as a raw material to produce magnesium oxide (MgO) by dehydration, the oxide being used, for example, as a refractory material. One widespread natural source of magnesium oxide is the mineral dolomite, which is a mixed carbonate of calcium and magnesium. Various processes have been suggested for recovering magnesium oxide values from dolomite. For example, it is known to calcine the dolomite to produce MgO and CaO and then to react the calcined dolomite with magnesium chloride (MgCl in aqueous solution to produce a precipitate of magnesium hydroxide and calcium chloride in solution. When a cheap source of magnesium chloride is readily available, for example in the form of sea water or naturally occurring brines, it is economical to discard the calcium chloride produced by the above process. However, when other reactants are used, it will generally be found economically desirable to recover the calcium-containing material produced or to convert it to another form so as to recover the original reactant material. One of the disadvantages of the above-described sea water method of producing magnesium hydroxide is that the magnesium hydroxide precipitate formed is a difiicultly filterable sludge of finely divided particles.

It is one of the advantages of this invention that the magnesium hydroxide formed is in a readily filterable form, enabling ready separation of the hydroxide precipitate from the solution containing the calcium values. According to this invention, calcined dolomite is contacted by and reacted with an aqueous solution containing up to about 150 g. of magnesium nitrate per liter in suflicient amount to convert the Mg++ ions in the solution and the MgO values of the calcined dolomite to magnesium hydroxide precipitate and to convert the CaO value of the calcined dolomite to Ca ions in the nitrate solution. Thus, for example, 1 liter of 2 N aq. Mg(NO reacts with 1 g. mol of calcined dolomite (96.40 g.) to yield 2 g. mols of Mg(OH) and an approximately 2 N solution of Ca(NO a slight amount of water being in combination with the Mg(OH) In this reaction the solid magnesium hydroxide particles produced precipitate and are separated from the solution containing calcium nitrate.

The calcium nitrate solution is then contacted and reacted with a further amount of calcined dolomite together with gaseous carbon dioxide (CO in suflicient amount to convert the Ca++ ions in the solution r 7 3,393,976 Patented .iuly 23, 1968 ICC and the CaO value in the calcined dolomite to calcium carbonate, which precipitates, and to convert the MgO values in the calcined dolomite to dissolved Mg(NO in the nitrate-containing solution. The amount of CO required can be calculated from the equation and the efficiency of the carbonation reaction. An efficiency of 7080% can be expected in, for example, a 3-stage countercurrent reactor. Preferably, the carbonation is carried out at or above C. so as to form the denser, coarser, and therefore, more readily filterable aragonite form of CaCO A reaction temperature of 90 C. or higher is not difiicult to maintain if hot calcined. dolomite is used, especially since the reaction is exothermic.

After separating the calcium carbonate so formed from the magnesium nitrate solution, this solution can, for most economical operation, be recycled to the first step of the process for reaction with more calcined dolomite. It will be understood that calcined dolomite is formed by heating dolomite rock to such a temperature, for example about 1100 C., as to decompose the magnesium and calcium carbonate to magnesium oxide and calcium oxide in an active, as opposed to deadburned, state. While it is preferred that the calcined dolomite which is reacted with the magnesium nitrate solution be in the form of CaO and MgO, it will be understood that upon contact with the aqueous solution the CaO and MgO will tend to hydrate to Ca(OH) and Mg(OH) respectively, and that it is possible to carry out this hydration reaction before contacting the calcium and magnesium values with the magnesium nitrate solution. It will also be understood that it is essential to the successful operation of this process that the dolomite be completely decomopsed from the carbonate or, stated differently, that the calcined dolomite used in this reaction contain essentially no calcium or magnesium carbonate.

The reason for this is found in the relative solubilities of the various calcium and magnesium compounds involved, both carbonates being relatively insoluble and calcium oxide and hydroxide being relatively more (about 200 times) soluble than magnesium oxide and hydroxide. Thus, it will be very difiicult to procure a rection in aqueous solution with, for example, calcium carbonate. On the other hand, when calcined dolomite, being a mixture of CaO and MgO, is contacted with the aqueous magnesium nitrate solution, there will be approximately 200 times as much calcium dissolved as magnesium and the reaction will tend to produce dissolved Ca++ ions and precipitated magnesium values. While the CaO and MgO tend to react with the water of the aqueous magnesium nitrate solution to form the respective hydroxides, the solubility relationship between the two hydroxides is similar to that between the two oxides, so the net result of the reaction is still to produce dissolved Ca++ in the N0 solution and precipitated magnesium values in the form of magnesium hydroxide. The magnesium hydroxide produced by this method is readily filtered to separate it from the calcium nitrate solution.

In the second reaction step, wherein further calcined dolomite, together with gaseous carbon dioxide, is reacted with the calcium nitrate solution, the carbon dioxide reacts with the CaO, with any Ca(OI-I) formed, and with dissolved Ca++ ions to form precipitated calcium carbonate, while the magnesium values go into solution as Mg++ ions in conjunction with the NO;;* ions. Thus, the magnesium nitrate reactant used in the first step is regenerated for further use. It will be understood that when reaction with CaO, for example, is referred to, it is intended to include any reactive form of lime, but to exclude unreactive lime, for example that combined with silica, for example as dicalcium silicate. As an example of the practice of this invention, two liters of an aqueous solution of 294 grams of equivalent to 40.0 g./l. of MgO, were placed in a liter stainless steel beaker. The solution was agitated by a 2 /2 diameter propeller at 730 r.p.m. with a 3-legged bafile inserted to prevent splashing and to give better mixing.

Calcined dolomite, analyzing 58.8% CaO, 0.55% loss on ignition the balance being essentially MgO, in the amount of 174 grams was added over a second period to the agitated magnesium nitrate solution. The calcined dolomite all passed a 4 mesh screen and was retained on a 35 mesh screen. Prior to the addition of the calcined dolomite the temperature was 25 C.; rising to a maximum of 385 C. 2 minutes after the addition of calcine. After 30 minutes reaction time, ml. of the stirred mixture were removed and settled in a 100 ml. graduated stoppered cylinder 6.8 inches high. After 22 minutes settling time the precipitate had fallen 2.05 inches and after 330 minutes, 4.2 inches. The remainder of the precipitate was filtered, dried, washed with distilled water, dried, washed with acetone, dried overnight at C., and analyzed.

The dried precipitate showed a loss on ignition of 25.0% and the ignited precipitate showed a CaO content of 0.1%, based on the amount of MgO. The filtrant, being essentially solution, is regenerated by adding 88.69 g. of the calcined dolomite to 1000 ml. of filtrant and bubbling through it C0 The precipitate, which is essentially CaCO is filtered, the resulting filtrant being essentially a Mg(NO solution. In a comparison test, 2 liters of an aqueous solution of 189 grams MgCl equivalent to 40.0 g./l. MgO, were similarly reacted with 174 grams of calcined dolomite. In this case, a settling test carried out under the same conditions after 30 minutes reaction time showed a 4t settling of only 0.85 inch after 24 minutes and only 3.3 inches after 1334 minutes. The better settling characteristics of the magnesium hydroxide precipitate produced by the nitrate reaction are apparent. What is claimed is: 1.

The method of producing magnesium hydroxide which comprises: (1) admixing calcined dolomite and an aqueous solution of magnesium nitrate, (2) reacting said admixture to form magnesium hydroxide precipitate and an aqueous solution of calcium nitrate, (3) separately recovering said magnesium hydroxide precipitate and said calcium nitrate solution, (4) admixing said calcium nitrate solution with calcined dolomite and introducing gaseous carbon dioxide into said last-mentioned mixture, (5) reacting said carbon dioxide and said last-mentioned admixture to form calcium carbonate precipitate and magnesium nitrate solution, (6) separately recovering said calcium carbonate precipitate and said magnesium nitrate solution. 2. Method as in claim 1 wherein said recovered magnesium nitrate solution is recycled to step (1) to react with said first-mentioned calcined dolomite. 3. Method according to claim 1 wherein the magnesium nitrate solution used in step (1) is at ambient temperature. 4. Method according to claim 1 wherein suflicient magnesium nitrate is admixed in step (1) to react with all of the Ca++ ion available in said dolomite. 5.

Method according to claim 1 wherein sutficient carbon dioxide is used in step (4) to react with all the available Ca ion to form calcium carbonate. OSCAR R. VERTIZ, Primary Examiner. G. T. OZAKI, Assistant Examiner. Patent Citations Premier Magnesia, LLC Water Treatments Maximizing Our Precious Resource From source point, to wastewater collection and treatment, to discharge back into the environment, billions of gallons of water and thousands of miles of water infrastructure systems are treated each day with the neutralizing performance of magnesia. Concrete Improvements Constructed to Last Longer Research and development has produced environmentally benign applications of magnesium-based cement additives and other unique construction products. Material properties include high early strength, persistent bonding to substrates, and acid resistance. Ideal product candidates for many LEED applications. SOx Control for a Better Environment Power in Performance and Efficiencies When utilized in coal-fired or oil-fired power plants, magnesium hydroxide can help sequester SOx gas particles as they form and improve SOx gas removal efficiencies. When added to the fuel-source, a higher melting point slag is produced that is more friable and less adhesive inside the boiler or boiler tubes, improving performance and longevity.

Groundwater and Soil Remediation Cleaning Up Our Environment Successfully treating millions of tons of heavy metal contaminated waste at hundreds of environmental remediation project sites across the United States and the globe. Reclaiming brownfield and Superfund sites for redevelopment and economic growth. Magnesium hydroxide: Indications, Side Effects, Warnings - Drugs.com Know what to ask with our GIST Doctor Discussion Guide Magnesium hydroxide Generic Name: magnesium hydroxide (mag-NEE-zee-um) Brand Name: Generic only. No brands available. Overview Support Group Q & A Magnesium hydroxide is used for: Treating acid indigestion, heartburn, sour stomach, and constipation. It may also be used for other conditions as determined by your doctor. Magnesium hydroxide is an antacid. It works by neutralizing the acid in the stomach and by stimulating the bowels to move. Do NOT use magnesium hydroxide if: you are allergic to any ingredient in magnesium hydroxide Contact your doctor or health care provider right away if any of these apply to you.

Slideshow Breastfeeding and OTC Medication: Safety Tips That You Need To Know Before using magnesium hydroxide: Some medical conditions may interact with magnesium hydroxide. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you: if you are pregnant, planning to become pregnant, or are breast-feeding if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement if you have allergies to medicines, foods, or other substances if you have appendicitis, stomach pain, a blockage of your bowels, nausea, vomiting, diarrhea, kidney problems, rectal bleeding of unknown cause, or if you have had bowel surgery Some MEDICINES MAY INTERACT with magnesium hydroxide.

Tell your health care provider if you are taking any other medicines, especially any of the following: Anticoagulants (eg, warfarin) because the risk of their side effects may be increased by magnesium hydroxide Azole antifungals (eg, ketoconazole), bisphosphonates (eg, alendronate), cation exchange resins (eg, sodium polystyrene sulfonate), cephalosporins (eg, cephalexin), mycophenolate, penicillamine, quinolone antibiotics (eg, ciprofloxacin), or tetracyclines (eg, doxycycline) because their effectiveness may be decreased by magnesium hydroxide This may not be a complete list of all interactions that may occur. Ask your health care provider if magnesium hydroxide may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine. How to use magnesium hydroxide: Use magnesium hydroxide as directed by your doctor. Check the label on the medicine for exact dosing instructions. Take magnesium hydroxide by mouth with or without food.

Follow with a full glass (8 oz/240 mL) of water or other liquid. If you miss a dose of magnesium hydroxide, take it as soon as you remember. Continue to take it as directed by your doctor or on the package label. Ask your health care provider any questions you may have about how to use magnesium hydroxide. Important safety information: Magnesium hydroxide usually causes a bowel movement within 30 minutes to 6 hours of using it. If you do not have a bowel movement after using magnesium hydroxide, contact your doctor. Do NOT take more than the recommended dose or use the maximum dose for longer than 1 week without checking with your doctor. If your symptoms do not get better within 1 week or if they get worse, check with your doctor. Magnesium hydroxide should not be used in CHILDREN younger than 12 years old; safety and effectiveness in these children have not been confirmed. PREGNANCY and BREAST-FEEDING: It is not known if magnesium hydroxide can cause harm to the fetus. If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using magnesium hydroxide while you are pregnant.

It is not known if this medicine is found in breast milk. If you are or will be breast-feeding while you use magnesium hydroxide, check with your doctor. Discuss any possible risks to your baby. Possible side effects of magnesium hydroxide: All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome: Diarrhea. Seek medical attention right away if any of these SEVERE side effects occur: Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); loss of appetite; muscle weakness; nausea; slow reflexes; vomiting. This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA .

If OVERDOSE is suspected: Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center ( ), or emergency room immediately. Symptoms may include diarrhea; stomach cramps. Proper storage of magnesium hydroxide: Store magnesium hydroxide at room temperature, between 68 and 77 degrees F (20 and 25 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep magnesium hydroxide out of the reach of children and away from pets. General information: If you have any questions about magnesium hydroxide, please talk with your doctor, pharmacist, or other health care provider. Magnesium hydroxide is to be used only by the patient for whom it is prescribed. Do not share it with other people. If your symptoms do not improve or if they become worse, check with your doctor. Check with your pharmacist about how to dispose of unused medicine. This information should not be used to decide whether or not to take magnesium hydroxide or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you.

This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about magnesium hydroxide. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to magnesium hydroxide. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using magnesium hydroxide. Review Date: January 6, 2017 Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider.

You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

Question: A solution of magnesium hydroxide in water is better known by what name?
Answer: Milk of Magnesia