Catalyst for the manufacture of acrylonitrile

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

2006-07-04

2006-07-04

Saeed, Kamal A. (Department: 1626)

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

Catalyst or precursor therefor

Selenium or tellurium or compound containing same

C502S241000, C502S304000, C558S319000, C558S321000

Reexamination Certificate

active

07071140

ABSTRACT:
A catalyst comprising a complex of catalytic oxides comprising rubidium, cerium, chromium, iron, bismuth, molybdenum, and at least one of nickel or nickel and cobalt, optionally magnesium, and optionally one of phosphorus, antimony, tellurium, sodium, lithium, potassium, cesium, thallium, boron, germanium, tungsten calcium, wherein the relative ratios of these elements are represented by the following general formula:in-line-formulae description="In-line Formulae" end="lead"?RbaCebCrcMgdAeFefBigYhMo12Oxin-line-formulae description="In-line Formulae" end="tail"?wherein A is Ni or the combination of Ni and Co,Y is at least one of P, Sb, Te, Li, Na, K, Cs, Tl, B, Ge, W, Ca, Zn, a rare earth element, or mixtures thereof,a is about 0.01 to about 1,b is about 0.01 to about 3,c is about 0.01 to about 2,d is 0 to about 7,e is about 0.01 to about 10,f is about 0.01 to about 4,g is about 0.05 to about 4,h is 0 to about 3,x is a number determined by the valence requirements of the other elements present,wherein “b”+“c” is greater than “g” and wherein the catalyst is substantially free of manganese, a noble metal and vanadium. 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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