Patent number: 5498588
Abstract: The process of manufacturing a catalyst having the following empirical formula:VSb.sub.m A.sub.a D.sub.d O.sub.xwhere A is one or more of Ti, Sn, Fe, Cr, Ga, Li, Mg, Ca, Sr, Ba, Co, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B and Mn,D is one or more of Li, Ag, Fe, Co, Cu, Cr, Mn, (VO).sup.2+, (PW.sub.12 O.sub.40).sup.3- and (PMo.sub.12 O.sub.40).sup.3-m is from about 0.5 to 10a is 0.01 to 10d is 0.0001 to 2.0, preferably 0.0001 to 0.1;x=number of oxygen ions necessary to satisfy the valency requirementcomprising forming a catalyst precursor having the formula VSbmAaOx wherein m, A, a and x are defined above, adding at least one D element to the surface of said catalyst precursor and calcining the surface modified catalyst precursor to produce said catalyst.
Type:
Grant
Filed:
September 9, 1994
Date of Patent:
March 12, 1996
Assignee:
The Standard Oil Company
Inventors:
James F. Brazdil, Fernando A. P. Cavalcanti