Preparation of vanadium antimonate based catalysts using SnO2,nH20

摘要

A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula:        VSb_mA_aD_dO_x   whereAis one or more Ti, Sn, where Sn is always presentDis one or more Li, Mg, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn,Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Aland Mn whereinmis 0.5 to 10ais greater than zero to 10dis zero to 10xis determined by the oxidation state of the cations present, comprising making an aqueous slurry of a mixture of source batch materials comprising compounds of said elements to be included in the final catalyst, followed by drying and heat calcining the mixture to an active catalyst, wherein the source batch material for the tin is a solution which comprises SnO₂·xH₂O wherein x ≥ 0 dispersed in tetraalkyl ammonium hydroxide wherein the tetraalkyl ammonium hydroxide is defined by the following formula:        C_nH_2n+1NOH   wherein 5 ≥ n ≥ 1,drying said slurry and calcining the mixture to an upper calcination temperature of at least 500°C.