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Patent US4524015 - Oxygen absorbent - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA particulate or granular oxygen absorbent comprising at least one ascorbic compound selected from ascorbic acid, ascorbic acid salts or mixtures thereof, an alkali metal carbonate, an iron compound, carbon black and water and the absorbent coated with a finely divided powder are disclosed....http://www.google.com/patents/US4524015?utm_source=gb-gplus-sharePatent US4524015 - Oxygen absorbentAdvanced Patent SearchPublication numberUS4524015 APublication typeGrantApplication numberUS 06/521,167Publication dateJun 18, 1985Filing dateAug 5, 1983Priority dateAug 9, 1982Fee statusLapsedPublication number06521167, 521167, US 4524015 A, US 4524015A, US-A-4524015, US4524015 A, US4524015AInventorsHideyuki Takahashi, Toshio Komatsu, Yoshiaki InoueOriginal AssigneeMitsubishi Gas Chemical Company, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (3), Referenced by (62), Classifications (11), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetOxygen absorbentUS 4524015 AAbstract A particulate or granular oxygen absorbent comprising at least one ascorbic compound selected from ascorbic acid, ascorbic acid salts or mixtures thereof, an alkali metal carbonate, an iron compound, carbon black and water and the absorbent coated with a finely divided powder are disclosed.
What is claimed is: 1. A particulate or granular oxygen absorbent comprising at least one ascorbic compound selected from ascorbic acid, ascorbic acid salts or mixtures thereof, an alkali metal carbonate, an iron compound, carbon black and water.
BACKGROUND OF THE INVENTION This invention relates to particulate oxygen absorbent having good flowability.
SUMMARY OF THE INVENTION The present inventors have carried out wide research to find a particulate oxygen absorbent having sufficient flowability. We found that if carbon black is used as a filler for an oxygen absorbent, a particulate or granular oxygen absorbent with good flowability can be prepared. We also found that its flowability can be improved by coating the resulting particulate or granular oxygen absorbent with finely divided powder which is only slightly soluble in water.
DETAILED DESCRIPTION OF THE INVENTION The term "oxygen absorbent" in the specification and the claim means an agent for absorbing or removing oxygen.
EXAMPLE 1 ______________________________________Sodium ascorbate 10 partsCarbon black     10 partsNa2 CO3             5 partsNaHCO3      12 partsFerrous sulfate   2 partsheptahydrate______________________________________
EXAMPLES 2 AND 3 AND COMPARATIVE RUN 1               TABLE 1______________________________________    Comparative run 1                Example 2 Example 3______________________________________Sodium ascorbate      10 parts      10 parts  10 partsCarbon black      --            10 parts  10 partsActivated carbon      10 parts      --        --Na2 CO3       5 parts       5 parts   5 partsNaHCO3      12 parts      12 parts  12 partsFeCl2.4H2 O       2 parts       2 parts   2 parts______________________________________
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Grace &amp; Co.-Conn.Dispersion comprising tin sulfate or ferrous sulfate for reducing chromate in cementWO1989002709A1 *Sep 26, 1988Apr 6, 1989Pillsbury CoOxygen removalWO1994009084A1 *Oct 13, 1993Apr 28, 1994Aquanautics CorpPolymer compositions containing oxygen scavenging compoundsWO2010085927A1 *Jan 31, 2009Aug 5, 2010Moessmer RaimundComposition and system for detecting oxygen and biological ligandsWO2012020287A1 *Mar 18, 2011Feb 16, 2012Universidad De Los AndesOxygen-absorbing compound encapsulated in a silica matrix and method for the production thereof* Cited by examinerClassifications U.S. Classification252/188.28, 252/383, 502/406, 423/219, 502/401International ClassificationA23L3/3436, C09K15/02Cooperative ClassificationA23L3/3436, C09K15/02European ClassificationC09K15/02, A23L3/3436Legal EventsDateCodeEventDescriptionAug 26, 1997FPExpired due to failure to pay maintenance feeEffective date: 19970518Jun 15, 1997LAPSLapse for failure to pay maintenance feesJan 21, 1997REMIMaintenance fee reminder mailedDec 3, 1992FPAYFee paymentYear of fee payment: 8Dec 5, 1988FPAYFee paymentYear of fee payment: 4Aug 5, 1983ASAssignmentOwner name: MITSUBISHI GAS CHEMICAL COMPANY, INC., 5-2, MARUNOFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:TAKAHASHI, HIDEYUKI;KOMATSU, TOSHIO;INOUE, YOSHIAKI;REEL/FRAME:004162/0757Effective date: 19830728RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google