Process for preparing (meth)acrylic anhydride
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United States of America Patent
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Jul 11, 2006
Grant Date -
Jan 23, 2003
app pub date -
Jun 28, 2002
filing date -
Jul 6, 2001
priority date (Note) -
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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.
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