Disclosed is an oxidation catalyst which is particularly useful for the conversion of unsaturated aldehydes to the corresponding unsaturated carboxylic acid. The catalyst has the following empirical formula Mo.sub.a V.sub.b W.sub.c Mn.sub.d O.sub.e.
This is a continuation of application Ser. No. 176,298, filed Aug. 30, 1971, now abandoned, which is a divisional application of application Ser. No. 796,651 filed Feb. 3, 1969, now U.S. Pat. No. 3,644,509.
Catalysts having improved attrition resistance are produced by incorporating a substantially uniform appearing coating of completely calcined, catalytically active oxide material onto an inert porous support containing sorbed aqueous silica sol. Such catalysts are useful in the gas phase oxidation of unsaturated aldehydes to unsaturated acids, especially acrolein to acrylic acid.
Cyclohexanone and/or cyclohexanol can be oxidized in the vapor phase to phenol by contacting the cyclohexanone and/or cyclohexanol with a suitable oxidation catalyst in the presence of molecular oxygen. Suitable catalysts are solids comprising Mo, W, Sb and/or V oxides or complexes thereof. The catalysts may be promoted with additional elements.
4547588 - Process for producing methacrylic acid - Owned by The Halcon SD Group, Inc. (New York, NY) [*] Notice:The portion of the term of this patent subsequent to March 5, 2002 has been disclaimed.
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 and/or calcium and optionally may include one or more of the elements Ni, Zn, Ru, Rh, Pd, Pt, As, K, Rb, Sr, Ba, Cr, V, Nb, W, Mn, Re, and rare earth metals including La.
