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1. (WO2013122905) PROCESS FOR THE PRODUCTION OF ACID ANHYDRIDES FROM EPOXIDES

Pub. No.:    WO/2013/122905    International Application No.:    PCT/US2013/025683
Publication Date: Fri Aug 23 01:59:59 CEST 2013 International Filing Date: Wed Feb 13 00:59:59 CET 2013
IPC: C07C 67/38
C07D 307/60
C07D 303/12
Applicants: NOVOMER, INC.
Inventors: LEE, Han
SLOWIK, Michael, A.
Title: PROCESS FOR THE PRODUCTION OF ACID ANHYDRIDES FROM EPOXIDES
Abstract:
A method of making acid anhydrides from epoxide and carbon monoxide feedstocks is presented. In various aspects, the method includes steps of reacting the contents of a feed stream comprising an epoxide, a solvent, a carbonylation catalyst and carbon monoxide to produce a first carbonylation product stream comprising a beta-lactone, then reacting the contents of the first carbonylation product stream with additional carbon monoxide to produce a second carbonylation product stream comprising an acid anhydride, and separating at least a portion of the acid anhydride from the second carbonylation product stream to produce: i) an acid anhydride product stream comprising the separated portion of acid anhydride; and ii) a recycling stream comprising the carbonylation catalyst, and finally adding the recycling stream to the feed stream.