Ammoxidation catalysts and methods for their preparation for use in the production of isophthalonitrile
AssigneeThe Standard Oil Company
InventorsChristos Paparizos, Wilfrid G. Shaw
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Abstract
Catalysts having the general formula: V.sub.1 Bi.sub.a Sb.sub.b Fe.sub.c X.sub.d Y.sub.c Z.sub.f O.sub.g wherein, X=Mo, Cu, W, Nb, Te, P, Sn, Ge, As Y=Co, Ni, Ce, La, Mn, Cr Z=Alkali, alkaline earth, B, Tl and, a=0.1-10,b=0.01-20,c=0.01-5,d=0-5,e=o-3,f=0-1, and g is determined by the valance requirements of the elements present, are produced by first forming and calcining an iron-antimony oxide composition which is subsequently combined with compounds of vanadium, bismuth and other elements. The catalysts are useful in the formation of phthalonitriles from the reaction of xylenes with oxygen and ammonia at elevated temperatures.
Claims9
A method for producing a catalyst suitable for ammoxidation comprising the steps of:
- a) forming an iron-antimony oxide composition including calcining and
- b) combining said composition with vanadium and bismuth compounds and optionally other metal compounds to produce a catalyst containing the elements and proportions represented by the general formula:
- V.sub.1 Bi.sub.a Sb.sub.b Fe.sub.c X.sub.d Y.sub.e Z.sub.f O.sub.g
- wherein,
- X=Mo, Cu, W, Nb, Te, P, Sn, Ge, As
- Y=Co, Ni, Ce, La, Mn, Cr
- Z=Alkali, alkaline earth, B, Tl and,
- a=0.1-10, b=0.01-20, c=0.01-5, d=0-5, e=0-3, f=0-1, and g is determined by the valance requirements of the elements present.
An ammoxidation catalyst composition having the general formuls:
- V.sub.1 Bi.sub.a Sb.sub.b Fe.sub.c X.sub.d Y.sub.e Z.sub.f O.sub.g
- wherein,
- X=Mo, Cu, W, Nb, Te, P, Sn, Ge, As
- Y=Co, Ni, Ce, La, Mn, Cr
- Z=Alkali, alkaline earth, B, Tl and,
- a=0.1-10, b=0.01-20, c=0.01-5, d=0-5, e=0-3, f=0-1, and g is determined by the valance requirements of the elements present, said catalyst being further characterized in that said catalyst is prepared by pre-forming an iron-antimony oxide composition including calcining before admixture with the other catalyst components.
Dependencies are inferred from the claim text.