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Expired
Application number
GB20589/48A
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Acordis UK Ltd
Original Assignee
British Celanese Ltd
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Publication date
Application filed by British Celanese LtdfiledCriticalBritish Celanese Ltd
Publication of GB653197ApublicationCriticalpatent/GB653197A/en
C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
C07C51/42—Separation; Purification; Stabilisation; Use of additives
C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
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Chemical & Material Sciences
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Organic Chemistry
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Chemical Kinetics & Catalysis
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General Chemical & Material Sciences
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Engineering & Computer Science
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Oil, Petroleum & Natural Gas
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
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Abstract
Propionic acid is purified by treating with hydrogen peroxide at approximately 25 DEG C. for 24 hours. The acid so obtained may be dehydrated directly with acetic anhydride to give propionic anhydride and acetic acid. 1-10 per cent by weight of aqueous hydrogen peroxide of 30-3 per cent strength based on the weight of propionic acid may be employed with propionic acid of more than 99 per cent purity. An example is given.
GB20589/48A1947-08-161948-08-04Purification of propionic acid
ExpiredGB653197A
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