Catalyst for the manufacture of acrylonitrile

Details Catalyst for the manufacture of acrylonitrile Catalyst for the manufacture of acrylonitrile

2003-11-19

2008-03-25

Wilson, James O. (Department: 1624)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C558S321000

Reexamination Certificate

active

07348291

ABSTRACT:
A catalyst comprising a complex of catalytic oxides comprising potassium, cesium, cerium, chromium, cobalt, nickel, iron, bismuth, molybdenum, wherein the relative ratios of these elements is represented by the following general formulain-line-formulae description="In-line Formulae" end="lead"?AaKbCscCedCreCofNigXhFeiBijMo12Oxin-line-formulae description="In-line Formulae" end="tail"?whereinA is Rb, Na, Li, Tl, or mixtures thereof,X is P, Sb, Te, B, Ge, W, Ca, Mg, a rare earth element, or mixtures thereof,a is 0 to about 1,b is about 0.01 to about 1,c is about 0.01 to about 1,d is about 0.01 to about 3,e is about 0.01 to about 2,f is about 0.01 to about 10,g is about 0.1 to about 10,h is 0 to about 4,i is about 0.1 to about 4,j is about 0.05 to about 4,x is a number determined by the valence requirements of the other elements present,and wherein the catalyst is substantially free of manganese and zinc. The catalyst is useful in processes for the ammoxidation of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile and mixtures thereof, respectively.

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