Abstract:
A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum and calcium and characterized by the following empirical formula:
A a B b C c D d Fe e Bi f Mo 12 O x
where
A = one or more of Li, Na, K, Rb and Cs or mixtures thereof B = one or more of Mg, Mn, Ni, Co, Ag, Pb, Re, Cd and Zn or mixtures thereof C = one or more of Ce, Cr, Al, Sb, P, Ge, La, Sn, V and W or mixtures thereof D = one or more of Ca, Sr, Ba or mixtures thereof
and a = 0.01 to 1.0; b and e = 1.0 - 10; c, d, and f = 0.1 to 5.0 and x is a number determined by the valence requirements of the other elements present.
Abstract:
A process for preparing acrylonitrile comprises ammoxidising propylene in the presence of a complex oxide catalyst having the empirical formula:
A a B b C c D d Fe e Bi f Mo 12 O x
where A is Cs, K or mixtures thereof B is one or more of Mg, Mn, Ni, Co, Ag, Pb, Re, Cd and Zn or mixtures thereof C is one or more of Ce, Cr, P, Ge and mixtures thereof D is Ca and optionally one of Sr, Ba or mixtures thereof and a = 0.01 to 1.0 b and e = 1.0 to 10 c, d and f = 0.1 to 5.0 and x is a number determined by the valence requirements of the other elements present.
Abstract:
A process for regenerating molybdenum containing ammoxidation catalyst comprising replacing the molybdenum loss from the catalyst during the ammoxidation reaction wherein ammonium dimolybdenum is utilized as the source for replacement of the molybdenum loss from the original catalyst.
Abstract:
A process for improving the catalytic properties of a substantially crystalline iron bismuth molybdate oxide complex interim catalyst comprises incorporating at least one element from Groups IA, IB, IIB, IIIA and IIIB of the periodic Table into the catalyst by impregnation, none of the Group IA elements incorporated into the catalyst by impregnation being derived from a molybdate or silicate. The catalysts provide improved results in oxidation type reactions.
Abstract:
The invention is related to new catalysts containing iron, bismuth, molybdenum and various additional elements which exhibit extremely attractive catalytic properties for the oxidation and ammoxidation of various olefins. The invention is further related to the use of such catalysts in the ammoxidation of propylene and isobutylene to acrylonitrile and respectively, methacrylonitrile.