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Preparation of .alpha., .beta.-unsaturated carboxylic acids and anhydrides

  • US 5,710,328 A
  • Filed: 11/27/1995
  • Issued: 01/20/1998
  • Est. Priority Date: 11/27/1995
  • Status: Expired due to Term
First Claim
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1. Process for the preparation of α



  • -unsaturated carboxylic acids and anhydrides thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic anhydride in the presence of a catalyst comprising mixed oxides of vanadium and phosphorus.

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