Process for preparing (meth)acrylic anhydride

Details Process for preparing (meth)acrylic anhydride Process for preparing (meth)acrylic anhydride

2006-07-11

2006-07-11

Zucker, Paul A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid anhydrides

Reexamination Certificate

active

07074957

ABSTRACT:
A process for the batchwise preparation of (meth)acrylic anhydride, in which acetic anhydride is reacted with (meth)acrylic acid and the acetic acid is at least partly removed gradually as it is formed. In the process, the acetic acid removed is at least partly replaced by introducing into the reaction medium, during the reaction, acetic anhydride and/or (meth)acrylic acid. The (meth)acrylic anhydride obtained by this process may be used in the synthesis of (meth)acrylic thioesters, (meth)acrylic amides and (meth)acrylic esters, in polymerization reactions or as crosslinking agents.

REFERENCES:
patent: 4857239 (1989-08-01), Hurtel et al.
patent: 2002/0161260 (2002-10-01), Schmitt et al.

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