PROCESS FOR THE PREPARATION OF HALOGENATED CARBOXYLIC ANHYDRIDES

Title:

PROCESS FOR THE PREPARATION OF HALOGENATED CARBOXYLIC ANHYDRIDES

Document Type and Number:

WIPO Patent Application WO/2014/195929

Kind Code:

A3

Abstract:

The present invention relates to a process for the preparation of halogenated carboxylic anhydrides, e.g. for the preparation of trifluoroacetic anhydride. The preparation is achieved by reacting a halogenated carboxylic acid, e.g. trifluoroacetic acid, with sulfuric acid, oleum and/or disulfuric acid.

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Inventors:

FERNSCHILD GUENTER
FREHSE JOACHIM
POHLMEYER WILHELM

Application Number:

PCT/IB2014/063713

Publication Date:

April 16, 2015

Filing Date:

August 05, 2014

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Assignee:

SOLVAY (BE)

International Classes:

C07C51/56; C07C53/16; C07C53/18

Foreign References:

DE590237C	1934-01-04
CN101108797A	2008-01-23
US3576888A	1971-04-27
JP2011093808A	2011-05-12

Attorney, Agent or Firm:

MROSS, Stefan et al. (310, 1120 Bruxelles, BE)

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