초록 ▼

A mixed metal oxide catalytic system consisting of molybdenum, vanadium, palladium, lanthanum, niobium and X, wherein X is copper and/or chromium, providing higher yields of acrylic acid and acrolein in the low temperature oxidation of propylene with a molecular oxygen-containing gas without the pro

A mixed metal oxide catalytic system consisting of molybdenum, vanadium, palladium, lanthanum, niobium and X, wherein X is copper and/or chromium, providing higher yields of acrylic acid and acrolein in the low temperature oxidation of propylene with a molecular oxygen-containing gas without the production of side products such as CO.

대표청구항 ▼

[ What is claimed is:] [1.] A catalyst for selective oxidation of propylene to acrylic acid and acrolein containing a catalyst composition comprising the elements Mo, V, La, Pd, Nb, X, and oxygen and having the following formula:EQU Mo.sub.a V.sub.b La.sub.c Pd.sub.d Nb.sub.e X.sub.f O.sub.y ;wherei

[ What is claimed is:] [1.] A catalyst for selective oxidation of propylene to acrylic acid and acrolein containing a catalyst composition comprising the elements Mo, V, La, Pd, Nb, X, and oxygen and having the following formula:EQU Mo.sub.a V.sub.b La.sub.c Pd.sub.d Nb.sub.e X.sub.f O.sub.y ;wherein X=Cu or Cr or mixtures thereof;a is 1;b is 0.01 to 0.9;c is >0 to 0.2;d is 0.0000001 to 0.2;e is 0.0000001 to 0.2;f is 0.0000001 to 0.2; andwherein the numerical values of a, b, c, d, e, and f represent the relative gram-atom ratios of the elements Mo, V, La, Pd, Nb, and X, respectively, in the catalyst and y is a number required to satisfy the valence requirements of the elements Mo, V, La, Pd, Nb, and X.