PROCESS FOR THE PREPARATION OF UNSATURATED ALDEHYDES AND ACIDS FROM PROPYLENE OPTIONALLY SUBSTITUTED IN TWO POSITIONS

摘要

1523141 Oxidation catalyst STANDARD OIL CO 15 July 1975 [22 July 1974 5 Aug 1974] 29589/75 Heading B1E [Also in Division C2] An oxidation catalyst used for the preparation of unsaturated aldehydes (see Division C2) formula wherein X is Ce, Th, Pr, Nb, Ge, Y, Zr, Ru, Ga, In, Cu, La, Ta, Sb or mixtures thereof; A is alkali metal or Tl or mixture thereof; D is Ni, Co, Mg, Mn, Zn, Cd, Ca, Sr or mixture thereof, except that D is not Mn unless X is Sb; E is P; As, B, S, Al or mixture thereof; a is greater than O but less than S; b and d are 0-4 except that b is not zero if X is Ga, In, La, Nb, Ge or Ta; c, f and g are 0.1-12; and X is a positive number. The catalyst may be supported, e.g. on alumina, silica, titania, zirconia or silicon carbide. The Examples relate to silicasupported catalysts formed by mixing a silica sol with solutions of compounds of the elements to be present, evaporating and calcining.