abstract |
A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, consists of the combination of oxides of molybdenum, copper, phosphorus, antimony, and cesium and optionally may include one or more of the elements Ni, Zn, Ru, Rh, Pd, Pt, As, K, Rb, Sr, Ba, Cr, Nb, W, Mn and rare earth metals including La. |