Claims
- 1. A catalyst composition suitable for the vapor-phase oxidation of methacrolein to produce methacrylic acid consisting essentially of the oxides of molybdenum, copper, phosphorus, antimony, calcium, tungsten, and optionally arsenic and having the formula Mo.sub.a Cu.sub.b P.sub.c Sb.sub.d Ca.sub.e W.sub.f As.sub.g O.sub.h, where: a=12; b=0.05-3; c=0.1-5; d=0.01-0.6; e=0.1-6; f=0.01-3; g=0-3; and h=value determined by the valence and proportions of the other elements of the formula.
CROSS-REFERENCE TO OTHER APPLICATIONS
This is a continuation-in-part of U.S. Ser. No. 972,743 filed Dec. 26, 1978.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4001316 |
Ishini |
Jan 1977 |
|
4045478 |
Umemura et al. |
Aug 1977 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
972743 |
Dec 1978 |
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