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

Patent ·
OSTI ID:871334
 [1];  [2];  [3];  [3]
  1. Cary, NC
  2. Durham, NC
  3. Kingsport, TN
+ Show Author Affiliations

Disclosed is a process for the preparation of .alpha.,.beta.-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, phosphorus and, optionally, a third component selected from titanium, aluminum or, preferably silicon.

Research Organization:
RESEARCH TRIANGLE INSTITUTE
DOE Contract Number:
AC22-94PC94065
Assignee:
Eastman Chemical Company (Kingsport, TN)
Patent Number(s):
US 5710328
OSTI ID:
871334
Country of Publication:
United States
Language:
English

References (7)

Vapor-Phase Aldol Condensation of Formaldehyde with Propionic Acid on Vanadium Pentoxide—Phosphorus Pentoxide journal January 1988
Editorial journal January 1987
Reaction of propionic acid with methylal over vanadium-silicon-phosphorus oxide journal January 1990
The production of methacrylic acid by the vapor-phase aldol condensation of propionic acid with formaldehyde journal July 1990
The Production of Methacrylic Acid by the Vapor-Phase Aldol Condensation over V–Si–P Ternary Oxide Catalyst journal April 1990
Reaction of Methyl Propionate with Methylal over V–Si–P Ternary Oxide Catalysts journal December 1990
Preparation of high-surface-area titanium-vanadium binary pyrophosphate catalysts journal March 1989

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-unsaturated
-unsaturated carboxylic
/999/
acids
alpha
aluminum
anhydride
anhydrides
beta
carboxylic
carboxylic acid
carboxylic acids
catalyst
catalyst comprising
component
component selected
comprises
comprises contacting
comprising
contacting
contacting formaldehyde
disclosed
formaldehyde
mixed
mixed oxide
mixed oxides
optionally
oxides
phosphorus
preferably
preparation
presence
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silicon
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third
titanium
vanadium