Talk:Distillation/Archive 1

message: can i have a definiton on distillation of petroleum as an application of fractional distillation.
Like Oil_refinery or Fractional_distillation ... ? Dbroadwell 05:39, 7 Apr 2005 (UTC)
thread_title:  Definition request 

message: Question: Does distillation only evaporate water?
Answer: Distillation evaporates many different kinds of substances as well as water.  H Padleckas 17:21, 27 December 2005 (UTC)
thread_title:  Does distillation only evaporate water? 

message: is it possible for a liquid with a constant b.p not to be pure?
:If you are referring to a constant boiling point during the process of a batch distillation, and I understand your question correctly, I believe the answer is yes--try investigating azeotropes; this might be the concept you are looking for.  Azeotropes are also discussed briefly in this article.--GregRM 03:14, 22 March 2006 (UTC)
thread_title:  glossary of terms 

message: I just started reading it and someone added in "You know what I mean yall"
A Distiller is also an Adobe term for the process of changing files into PDF files. SHould this be included here? I don't know enough about it to do it myself but came looking for an explaination so may be it should at least have a note and a link?
Thanks
:69.36.1.158, first of all, you should always sign and date your comments on a Discussion page.  If you end your comment with four tildes like this ~~~~, your comment will automatically be signed and dated.  
:As for mentioning the Adobe term "Distiller" in this article on Distillation, I don't think it is needed.  The article does not include the word "distiller". If it did, then it might be appropriate to mention the Adobe term and/or create a disambiguation page for the word "Distiller". But since that word is not included in the article, I don't think that any disambiguation is needed as yet. - mbeychok 22:58, 11 September 2006 (UTC)
thread_title:  Someone's messed with this page 

message: I just added a discussion and an image of industrial scale distillation towers.  In my opinion, the article was too heavily focused on laboratory distillation and whisky stills. - mbeychok 23:14, 25 March 2006 (UTC)
thread_title:  Added a discussion and image of industrial distillation towers 

message: The terms "still" and "pot" in reference to distillation equipment and reboilers may still be used in bench-scale lab work or perhaps even in pilot plant scale.  But industry (with perhaps the exception of some whisky distillers) rarely uses those terms today.  "Distillation towers", "fractionators", and "reboilers" are the terms almost universally used in petroleum refineries, petrochemical plants, natural gas processing plants, and other industries. I really think "still" and "pot" should be removed from this article. - mbeychok 06:12, 21 April 2006 (UTC)
replies: text:  "Classic" copper potstills are still used in Scotland for the production of Scotch. For instance, Glenmorangie still uses them. Reference: http://www.thewhiskystore.de/experts/copper.htm Hugo Dufort 21:38, 15 November 2006 (UTC)
thread_title:  The terms "still" and "pot" are rather archaic 

message: The trivia about George Washington may or may not be true.  But does it really belong here in a science article? Why not just add it to the George Washington article where it would be suitable and remove it from here? - mbeychok 06:12, 21 April 2006 (UTC)
replies: text: Nope ... but neat tidbits are what makes wikipedia not be britannica. So keep it, in the database. -- ∞Dbroadwell 01:00, 6 May 2006 (UTC)
thread_title:  Does trivia about George Washinton really belong here? 

message: What is with that thing about milking the pink cow at the beginning?
:It’s called vandalism, and was reverted 20 minutes ago. --Van helsing 13:51, 23 August 2006 (UTC)
thread_title:  Pink cow? 

message: While this article has quite a bit of rather complete data, it seems to end abruptly and is trying to answer all of the topics about distillation in one place. Idea: move more towards a featured article format by making sure that the data here, is represented in each of the sub-articles and making this one more of a 'summary' type of thing. Commentary? -- ∞Dbroadwell 14:52, 5 May 2006 (UTC)
replies: text: Quantockgoblin: I agree that some re-organization would be useful. I strongly disagree with your making a distinction between what you call "physical distillation" and "chemical distillation". In other words, your sections 3 and 4 should be combined into one section entitled "Types of distillation".  I also think that section 5.3 shoul be eliminated completely ... this article already has altogether too much emphasis on laboratory glassware and laboratory setups. Short path distillation and the Kugelrohr apparatus are covered in two section of the article as it now stands. - mbeychok 16:50, 12 October 2006 (UTC)
replies: text:  Mbeychok, thanks for your comments. I'm not too hung up on the idea that we need separate sections 3 and 4, I'm just trying to make sense of the various types of distillation. So maybe just a re-ordering of a combined section 3 and 4. Although, I can't help but think there is a bit of a distinction between separating mixtures as opposed to using distillation as a means for driving chemical reactions. I agree 5.3 is a little redundant, but I do think application of distillation in the lab will be of interest to readers.Quantockgoblin 12:51, 13 October 2006 (UTC)
replies: text: Quantockgoblin, thanks for letting me know that we are pretty much in agreement. I would just point out that using steam in steam distillation is not a means of driving chemical reactions. The steam, in effect, simply allows the distillation to occur at a lower temperature. Nor do I see how destructive distillation is a means of driving chemical reactions ... in fact, I am not sure that it is a distillation process. I think the more appropriate name is  pyrolysis. I agree that lab distillation is of interest to some readers, but there are many, many readers who are also interested in the tens of thousands of industrial distillation towers worldwide and I still believe this article does not have a proper balance between industrial and lab distillation. Regards, - mbeychok 15:43, 13 October 2006 (UTC)
replies: text: Mbeychok, great, I guess we just need to do the reorganisation then! Just to follow up on your last comment a little. You are correct that pyrolysis is not a distillation technique, although the products of the pyrolysis reaction are often distilled off. However, many chemical reactions exist in an equilibrium and that equilibrium can be driven to one side by distilling off the most volatile component. A classic example  would be to distil water from a equilibrium mixture of an alchol and an carboxylic acid to make an ester. This is certainly an application of distillation but is it distillation as such? In terms of balance, we probably need at least a third view? The only other option would be to split the article in some way, 'industrial scale distillation' vs ??? Quantockgoblin 17:12, 13 October 2006 (UTC)
replies: text: Quantockgoblin, I don't think we need to split the article ... we just need less laboratory chemistry orientation.  Your above "classic example" of distilling water from an alcohol and carboxylic acid mixture to make an ester is an example of what I mean .. it isn't really sticking to the definition of distillation in the opening sentence of this article, namely Distillation is a method of separation of substances based on differences in their volatilities. Your example is, in my opinion, purely a chemistry subject. It is not the layman's definition of distillation nor is it the engineer's definition of distillation. I think we should keep the total readership in mind and somehow achieve a balance between laboratory chemistry and the large world of industrial distillation. I do agree with you that we should wait until we've heard from at least 6 or more people.  With that, I will bow out of this dialogue until we have heard from many others. - mbeychok 18:53, 13 October 2006 (UTC)

text: I wondered if anyone would come back with that ... it really depends on the size of the acid/alcohol! But the point is the same, one component is removed to drive a reaction Quantockgoblin 17:57, 13 October 2006 (UTC)
thread_title:  Distillation Structure 

message: Simuulation is not "necessary" for designing fractionation columns, so I deleted that wording. Such columns were designed using plate-by-plate calculations done by manual calculations for many years before we even had hand-held calculators and computers. To preach a bit, what is "necessary" is for engineers to learn how to do such calculations manually because then they will be in a much better position to evaluate whether their "black box" simulation model is providing credible answers.
I also provided a better definition of distillation trays (or plates)
and how their efficiencies compare to theoretical equilibrium stages.
Finally, I deleted the statement that distillation columns might need four times more trays than theoretical equilibrium stages.  It is quite rare for distillation plates to have an efficiency as low as 25%.  Most trays in most distillation systems have efficiencies in excess of 60%. In any event, I don't think there is anything gained by attempting to characterize the "typical" range of efficiencies.  Distillation plate efficiencies are a function of the type of plate, the design of the plate, and of the separation system itself (i.e., feed composition, operating temperatures and pressures, etc.). - mbeychok 23:22, 5 May 2006 (UTC)
replies: text: Re: (OT) Engineering Soapbox; No kidding. If you had any clue how few of the engineering students could grasp the subleties multi-demsional integration or do math without calculating you might be suprised and I'm a student myself! But, Back On Topic; I'll do some writing up of the 'homebrew' low pressure distillation system and about solar distillation, which is a similar low pressure low tech type of thing. I'd like to see this article refactor into something that reads less like a jointed report and more like a encyclopedia article, but my own knowlege of the topic is a bit low to handle that at the moment. -- ∞Dbroadwell 01:26, 6 May 2006 (UTC)
thread_title:  Reason for changes 

message: Does distillation have any disadvantages other than the fact that the heat can be detremental to the materials within
:Disadvantages compared to what? And please sign your messages. - mbeychok 02:44, 17 September 2006 (UTC)
thread_title:  disadvantages 

message: Continuous fractional distillation pic uploaded and added to Continuous distillation; see Talk:Continuous distillation.  H Padleckas 19:05, 24 October 2006 (UTC)
replies: text: Hi, may I suggest you also make a simpler pictures of the distillation setups in batch and continuous distillations?  I have a degree in chemistry, with a broad background, so I can see what that picture means.  But I feel that my sister (who is a bright person, but who does not have a degree in chemistry) would not understand that picture without studying it.  Furthermore, I think that batch and continuous distillation are not per se industrial terms, as I tried to explain above (I work in a university lab, and I do batch distillations every now and then).  I am afraid that these pages are going to be too difficult for a layman to understand.  Could you please comment?  --Dirk Beetstra T C 21:15, 24 October 2006 (UTC)
replies: text: See comment at bottom about new pic.  H Padleckas 05:48, 28 October 2006 (UTC)

text: Dirk Beetstra, I disagree with you on this. I think that the drawing by Padleckas is excellent!!  There is nothing wrong with your sister or anyone else not familair with the subject having to study the drawing a bit to understand it. I have a degree in chemical engineering and 50 years of industrial experience in laboratory work as well as large industrial plant design ... and there are many things in pure chemistry, physics, electronics, etc. that I would have to study in order to understand them since they are not subjects with which I am familiar. A chemistry lab drawing or an industrial distillation tower drawing simply can not be simplified to the point of being immediately understood by everyone.  That's what comic strips are for.  This discussion is an example of precisely why I advocated having two completely separate categories, namely :Category:Laboratory distillation and :Category:Industrial distillation. - mbeychok 21:45, 24 October 2006 (UTC)
replies: text: Don't get me wrong, the picture is OK, very suitable .. but not in the introduction of continuous distillation, but we are writing an encyclopedia here, not an industrial manual for distillation.  I do believe that the explanation of the subject should start at a lower level than what it is now.  And I do believe that it can be drawn simpler than this.  And I do totaly disagree with that we need comic strips for that.  This is indeed an encyclopedia, not a comic strip.  --Dirk Beetstra T C 21:54, 24 October 2006 (UTC)

text: Could you point out, where my explanation of continuous distilltion in the comparison with batch distillation is wrong (in the distillation article)?  I believe that is a correct explanation of what continuous distillation is all about .. flow in = flow out (even without an image, or a comic strip).  --Dirk Beetstra T C 21:58, 24 October 2006 (UTC)
replies: text: Dirk Beetstra and mbeychok, my view is that the article needs to start quite simply and go into further depth as it goes on. Whether the extra depth should be the subject of 2 or more separate articles is another matter. I really think the artcle is getting there, so let's keep our energy on collectively trying to produce the best article we can.Quantockgoblin 08:59, 27 October 2006 (UTC)
replies: text: While we are on the subject of making images understood by your "laymen", the very first image in this article needs to .......  See  for continuation of this dicussion, which then turned to comparing the two simple lab distillation pics.  
This page was too long.  More info to be added there later.  H Padleckas 17:42, 26 October 2006 (UTC)
thread_title:  new pic(s) ? 

message: Is there an article on Vapor-liquid equilibrium anywhere?  I was unable to find one, so I started writing something here: User:H Padleckas/Temp (Vapor-Liquid Equilibrium) as a rough draft until I can get some diagrams.  If you know of such an article, please let me know so I can abandon this project.  Otherwise it may be nice to have some data or diagrams from somewhere.  If I had data or diagrams from somewhere, I could use that to make my own diagrams.  Otherwise, I would make "hypothetical" diagrams.  Also, if you see any major errors on that temp page, you can go ahead and fix them.  H Padleckas 14:03, 7 November 2006 (UTC)
thread_title:  [[Vapor-Liquid Equilibrium]] 

message: This book might be a good reference for the article:
--Stone 08:11, 15 November 2006 (UTC)
thread_title:  Reference 

message: This line does not make sense, the first part is wrong, in the simple case of the rotavapor or drying solvents, obtaining purity is not an issue. The dilution analogy I do not understand 
By the nature of the process, it is theoretically impossible to completely purify the components by using distillation, as distillation only tends to approach purity, never reaching it. This is comparable to dilution, which never reaches purity. If ultra-pure products are the goal, then further chemical separation must be applied.
Take it out? V8rik 23:59, 23 November 2006 (UTC)
replies: text: Rephrased it a bit - comments? --Rifleman 82 00:09, 24 November 2006 (UTC)
replies: text: Rifleman, regarding your wording "It is theoretically impossible to completely purify a mixture of components by distillation because each component in the mixture will have a non-zero partial pressure.", do you think it might be clearer if it read "It is theoretically impossible to completely purify a mixture of components by distillation because that would require each component in the mixture to have a zero partial pressure" ... or have I misunderstood you? Regards, - mbeychok 01:08, 24 November 2006 (UTC)
replies: text: Yes, that's what I was thinking of. --Rifleman 82 07:27, 24 November 2006 (UTC)
thread_title:  unclear sentence : By the nature of the process..... 

message: To all ChemCollaborators: Well done! ~K 01:30, 2 December 2006 (UTC)
thread_title:  Well done 

message: Shouldn't the cold-water in be from below? piece "6". so it comes in from below and travels up and out "7"?
:Sometimes the Liebig condensers have the two water plugs on the same side, sometimes on opposite sides. The setup shown in the picture seems reasonable to me. --Itub 13:25, 17 April 2007 (UTC)
thread_title:  Distillation picture 

message: The SVG image could be improved. In fact, until it is improved I have replaced the image with the .png image as I believe it is more acurate.
 
* The ".SVG" images is missing the outlet pipe from the receiving portion of the apparatus see “.PNG” image (above) - just above label 8. 
* label 10 is missing.
* Also some of the ground glass joints are shaded others are not. 
<U>To be picky:</U>
* The thermometer bulb could have a black line around it to show it is contained within the thermometer. 
* The side of the receiving flask (i.e. 16) is usually smaller than the boiling flask side (i.e. 15). 
* The in- and out- pipes of the condenser could be moved nearer the end of the condenser respectively so the condenser actually fills.
* It is not clear if the thermometer is inserted into the apparatus via a glass ground joint or not.
* The right angle edges (e.g. on condenser and else where) are usually rounded not squared off as glass tends to fail a square edges.
—Preceding unsigned comment added by 80.254.147.68 (talk) 12:03, 28 December 2007 (UTC)
replies: text: Agree, see also comments above regarding the SVG image above. 81.107.214.224 (talk) 00:11, 12 March 2008 (UTC)
replies: text: —Preceding unsigned comment added by Quantockgoblin (talk • contribs) 00:27, 26 May 2008 (UTC)
thread_title:  Distillation SVG picture 

message: This drawing requires a slight alteration to be correct.
In fact to be able to measure the condensing vapour temperature correctly the bulb of the thermometer has to be level with the pipe exit of the distillation flask. (Viz. eg. ASTM and/or IP standards for testing petroleum products)
LouisBB (talk) 08:17, 9 March 2008 (UTC)
replies: text: Agree, see also comments above regarding the SVG image above. 81.107.214.224 (talk) 00:11, 12 March 2008 (UTC)
thread_title:  Laboratory distillation drawing 

message: Extra pictures/schematics of regular and fuel stills are available from this document. Integrate in document (via link or by taking over the picture directly (best to ask for permission first).
Thanks.
KVDP (talk) 15:30, 3 April 2008 (UTC)
thread_title:  Schematics/pictures of stills and fuel stills 

message: A refractionating column-type diy-still (instant 94% ethanol) can also be made with metal tubing and a pot still. See this website This type of still has also been seen created in popular shows as Jericho Jericho tubed DIY still
Another variation of this is the "two dollar crockpot still", which is a cheap diy-still made out of a crock pot, piece of 1/4 inch copper tubing and a plastic milk jug filled with ice. See this site
Include in article.
81.246.144.251 (talk) 16:52, 28 May 2008 (UTC)
thread_title:  DIY Worm still 

message: note I did not see the above comments when posting this - however I still stand by this view.
Twice now there has been inserted text to state that "home stills have been popularised by [some TV show]"... This is just not right, nor encyclopaedic. Home stills very much predate any possible TV shows, and I would hazard a guess that they have been popularised by the biological effects of ethanol consumption, ie getting pissed.  The references provided, when examined do not in any way comment on exisiting popularity, nor the effect of the television show on this. As a second point, there is also a section which links to the main article on distilled beverages. Furthermore biofuels are not made by distillation, distillation is the separation process to separate out the biofuel from unwanted or recyclable material, used to improve the fuel's combustion, purity or storage properties (lab & industrial) or to recover valuable unconverted feeds (industrial). Finally wikipedia is not a DIY guide. I apologise for being blunt about this but I don't see this section, as it stands, to be an improvement to the article. User A1 (talk) 16:54, 30 May 2008 (UTC)
thread_title:  DIY Still 

message: The contents menu and the section "edit" links are showing up in a non-English language, probably Finnish. The same has been noted in Victor and Victor Talking Machine Company. Weird. 68.161.25.228 (talk) 03:37, 12 June 2008 (UTC)
replies: text: The Ä article has it as well. 68.161.25.228 (talk) 03:39, 12 June 2008 (UTC)
replies: text: Removing and replacing the language links somehow fixed it. 68.161.25.228 (talk) 13:45, 12 June 2008 (UTC)
thread_title:  Finnish? 

message: This may be useful for the article. I have had no response from the uploader concerning annotation. Perhaps someone can add annotations to the title portion of this thumb? - Leonard G. (talk) 17:41, 8 July 2008 (UTC)
replies: text: It is a little difficult to tell, owing to lack of expertise and the inability to look at it in three-dimensions. I will give it a shot, but would appreciate some confirmation from other editors. The system looks to be a batch still, with some modified components.
#still pot
#heater
#Stirrer/Agitator (The actual stirrer is inside the column, what is annotated is simply the motor.)
#Reboil viewing port
#Feed port/pressure seal hatch
#Distillation column, lower part
#distillation splitting pipe. This is used to reduce the height of the column
#Upper column
#Plate-plate viewing ports
#Reboil return 
#Condensor/reflux take off & return
#Condensor/reflux drum
#distillate tapping.
The above is quite likely to be wrong, so I am hesitant to include that in the article without verification. User A1 (talk) 02:37, 9 July 2008 (UTC)
thread_title:  Image found on commons 

message: Here is a better source for the history of distillation.
A Short History of the Art of Distillation from the Beginnings Up to the Death of Cellier Blumenthal by Forbs  J8079s (talk) 21:45, 9 November 2008 (UTC)
thread_title:  history 

message: Shouldn't there be something about partial distillation? 203.219.1.8 (talk) 07:51, 4 June 2009 (UTC)
thread_title:  Partial Distillation 

message: I don't understand why this article has a link to Zymurgy, which is not even mentioned in the text. It seems irrelevant and I think it should be removed.ChemE50 (talk) 20:59, 18 August 2009 (UTC)
replies: text: I guess it is a mutual link because zymurgy has a link to distillation, which in my view is also inappropriate.Chemical Engineer (talk) 21:58, 18 August 2009 (UTC)
thread_title:  See also 

message: The section on MED needs revision.
As is, it is worse than having no information.  — Preceding unsigned comment added by Alexander.mitsos (talk • contribs) 23:18, 25 April 2011 (UTC)
thread_title:  MED 

message: This page says the minimum difference in boiling point temperatures of compounds in a mixture in order for simple distillation to be useful is 25°C. My textbook (Gilbert and Martin, Experimental Organic Chemistry 4th edition) says the minimum temperature difference is 40-50°C, which is a huge difference. The textbook says that 20-30°C is the minimum for fractional distillation. I tend to agree with my textbook as we just did simple distillation of Ethyl Acetate and Butyl Acetate (difference in b.p. 49°C) in my Orgo lab and the results were less than great. But that's original research so I was wondering if anyone else had an opinion or a better source.
Not sure how to answer clearly, but here goes...
The concept of there being a need for a minimum difference in boiling points is erroneous and probably comes from rules of thumb for separating two pure phases in a single distillation using a simple apparatus.  That is, if you can boil off 100% of phase A without boiling off/condensing phase B.  Think back to WWII in Norway, when heavy water was separated from "normal" water by multiple distillation.  The boiling point difference is only 1.4 degrees, yet heavy water was successfully produced.  — Preceding unsigned comment added by 130.116.161.48 (talk) 09:11, 27 October 2011 (UTC)
thread_title:  Minimum difference in boiling point temperatures for simple distillation to be useful? 

message: According to homedistiller.org (unlicensed) distillation is an illegal process in most if not all nations, except New Zealand. I doubt this, but was wondering if there is any detail on the legality of distillation per country. --— robbie page talk 16:17, 3 July 2011 (UTC)
thread_title:  legality of distillation 

message: i want to know how can we seperate ea and ipe having  composition 10% and 90% respectively.  — Preceding unsigned comment added by 59.98.39.80 (talk) 10:38, 14 February 2012 (UTC)
thread_title:  distilation of ethyle acetate and isopropyl ether  

message: Isn't the word still primarily used only for primitive traditional devices and for devices used in the destillation of alcohol(ic beverages) and perfume etc?  — Preceding unsigned comment added by 150.227.15.253 (talk) 10:08, 30 December 2013 (UTC)
thread_title:  "A still is the apparatus used for distillation" 

message: Currently, Distilled alcohol redirects here. Wouldn't it make at least equal sense to point to Distilled beverage instead? --Florian Blaschke (talk) 22:43, 29 July 2014 (UTC)
thread_title:  Question about a redirect 

message: is water from a home dehydrator distilled water?  — Preceding unsigned comment added by 69.112.98.171 (talk) 20:06, 17 March 2015 (UTC)
thread_title:  Home dehydrator water   

message: I note from the article that the earliest distillation mentioned is from around the first century, whereas the 2003-2007 excavation of a perfume factory, with alembic distillers found in situ, at Pyrgos, on the Greek island of Santorini puts its origins at least earlier than 1850 B.C., when the factory was destroyed by an earthquake and fire.https://www.morningmystbotanics.com/wp-content/uploads/pyrgosdistillation.pdf
http://news.nationalgeographic.com/news/2007/03/070329-oldest-perfumes.html
I haven't the time to make such a large re-write to the article myself, but I thought it important to bring to the attention of other editors.
Gwydion Stone (talk) 21:23, 17 May 2017 (UTC)
thread_title:  Earliest Evidence of Distillation: 1850 B.C. 

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thread_title:  External links modified 

message: Please do not use Evaporation when you mean Vaporization. Chemical Engineer (talk) 16:30, 11 December 2017 (UTC)
thread_title:  Distillation requires boiling.  Evaporation is not a synonym for boiling 

message: The ETP Laboratory Procedure to determine the Volatile Fatty Acid 
Step 1: take filtered 100 ml fresh sample from anaerobic basin and 100 ml distilled water and mix both without creating air bubble.
Step 2: make 3 pH of mixed sample by adding H2SO4 conc.(1:1).
Step 3: set the distillation assembly.
Step 4: put the distillation flask on heat source and maintain the temperature at 80°C.  
Step 5: run the cold tap water through cooling assembly.
Step 6: collect 150 ml of condensate from another end of the assembly.
Step 7: add few drops of phenolphthalein indicator.
Step 8: titrate the sample with 1 N NaOH until the the pink color disappear.
Calculations: 
mls of NaOH * N of NaOH * 50000 / 150 ml ( vol. of sample )
watch ETP operation and lab analysis videos  here 
  
thumb  — Preceding unsigned comment added by 14.141.161.246 (talk) 04:18, 14 December 2018 (UTC)
thread_title:  The ETP Laboratory Procedure to determine the Volatile Fatty Acid 

message: The wikipedia page on Distillation includes the following:  "Clear evidence of the distillation of alcohol comes from the Arab chemist Al-Kindi in 9th-century Iraq".  I do not believe this claim to be correct.  Al-Kindi does describe the distillation of wine, but that does not necessarily mean that he managed to distill alcohol.  In fact, in the same passage he compares the distillation of wine with the distillation of vinegar.  In all probability, Al-Kindi's apparatus did not have the proper cooling mechanism, which meant that he could boil wine, but he could not increase the alcohol content of the distillate.
Marwanelasmar (talk) 17:06, 27 August 2019 (UTC)
thread_title:  Claim of Alcohol Distillation During the 9th Century 

message: The 'Bold text'  — Preceding unsigned comment added by 42.111.130.30 (talk) 05:42, 14 July 2020 (UTC)
thread_title:  Aravindhan 

message: In the history section it is written that Tadeo Alderotti developed fractional distillation. However according to this source (https://books.google.co.in/books?id=gdLk3YPZiLEC&pg=PA44&dq=although+avicenna+is+credited+distillation+history&hl=en&sa=X&ved=2ahUKEwjg4f-Om-b0AhXozjgGHT0iD8IQ6AF6BAgMEAM#v=onepage&q=Fractional%20distillation%20&f=false) fractional distillation appeared in latin translation of work of an anonymous arab scientist.
2405:204:3480:618E:6DCA:954F:F10B:14BC (talk) 16:37, 15 December 2021 (UTC)
replies: text: Yes, you're entirely right. The attribution of fractional distillation to Taddeo Alderotti was a serious error here: the source (Holmyard 1957, pp. 51–52) merely mentions that Alderotti used fractional distillation in his new process for purifying alcohol. I've corrected that, and also added a paragraph on fractional distillation (using, a.o., the source you gave here; thanks for that!), which actually is already attested in the 9th-century works attributed to Jabir ibn Hayyan. ☿ Apaugasma (talk ☉) 18:26, 15 December 2021 (UTC)
replies: text: Thank you 🙏2409:4050:2E4B:9E86:CFDB:A3EE:74B5:143B (talk) 19:04, 15 December 2021 (UTC)
thread_title:  History of fractional distillation