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US 4,374,757 AGranted
Catalyst and process for producing methacrylic acid
AssigneeThe Halcon SD Group, Inc.
InventorSargis Khoobiar
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Abstract
A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, and cesium in predetermined relative atomic ratios.
Claims1
A cataylst composition suitable for the vapor-phase oxidation of methacrolein to produce methacrylic acid having the formula Mo.sub.a Cu.sub.b P.sub.c Sb.sub.d Cs.sub.e O.sub.f where:
- a=12;
- b=0.05-3;
- c=0.1-5;
- d=0.01-3;
- e=0.1-3;
- and f=value determined by the valence and proportions of the other elements of the formula.
3 more elements
Dependencies are inferred from the claim text.