Process for producing O,O'-diacyltartaric anhydride and process for producing O,O'-diacyltartaric acid
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United States of America Patent
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Sep 19, 1995
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N/A
app pub date -
Nov 29, 1993
filing date -
Nov 30, 1992
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Abstract
An industrial process for producing O,O'-diacyltartaric anhydride with high purity and high efficiency is disclosed. According to the process of the invention, a carboxylic acid of the formula (I): R.sup.1 COOH (I) (wherein R.sup.1 represents C.sub.1 -C.sub.4 alkyl group; phenyl group; or phenyl group substituted with 1-5 C.sub.1 -C.sub.4 alkyl groups or with 1-5 halogen atoms) is reacted with tartaric acid in the presence of a chlorinating agent.
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