Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB33374/28A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
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IG Farbenindustrie AG
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Publication date
Application filed by IG Farbenindustrie AGfiledCriticalIG Farbenindustrie AG
Publication of GB300563ApublicationCriticalpatent/GB300563A/en
C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
C07C51/54—Preparation of carboxylic acid anhydrides
C07C51/573—Separation; Purification; Stabilisation; Use of additives
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Chemical & Material Sciences
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Organic Chemistry
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Engineering & Computer Science
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Oil, Petroleum & Natural Gas
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Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means
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Abstract
300,563. I. G. Farbenindustrie Akt.- Ges. Nov. 14, 1927, [Convention date]. [The subject-matter was laid open to inspection under Sect. 91 of the Acts, Feb. 12, 1928]. Addition to 285,090. Acetic anhydride.-In the process of the parent Specification for condensing acetic anbydride from a mixture of its vapour with water vapour by treatment with organic solvents in a column, a dephlegmation is placed at the top of the column, and the organic solvent, such as benzene, toluene, or benzene and trichlorethylene is admitted only at the bottom of the column.
GB33374/28A1927-11-141928-11-14Process for dehydrating vapour mixtures containing acetic anhydride and water
ExpiredGB300563A
(en)