Catalyst for the manufacture of acrylonitrile
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United States of America Patent
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Mar 25, 2008
Grant Date -
Jun 10, 2004
app pub date -
Nov 19, 2003
filing date -
Dec 2, 2002
priority date (Note) -
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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 formula A.sub.aK.sub.bCs.sub.cCe.sub.dCr.sub.eCo.sub.fNi.sub.gX.sub.hFe.sub.iBi.s-ub.jMo.sub.12O.sub.x wherein A 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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