Catalyst and catalyst precursor containing vanadium and antimony
AssigneeThe Standard Oil Company
InventorsMark A. Toft, James F. Brazdil, Jr., Linda C. Glaeser
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Abstract
Disclosed is a method of making a catalyst precursor by reacting the ion VO(O.sub.2).sup.+ in aqueous solution with an antimony compound that contains Sb having a valence of 3. In one embodiment, the VO(O.sub.2).sup.+ ion is made by reacting H.sub.2 O.sub.2 with a vanadium compound. Also disclosed is making a catalyst by drying and calcining such precursor. When the drying is effected by spray drying a new microspheroidal catalyst is produced. The catalysts useful for ammoxidation of propane are more attrition resistant than catalysts of the same empirical formula made by prior art methods.
Claims18
A method of making a catalyst precursor having vanadium and antimony in oxide form in the atomic ratio of Sb to V in the range from 0.8 to 4, by reacting the monoperoxovanadium ion, VO(O.sub.2).sup.+, while in aqueous solution with an antimony compound which contains Sb having a valence of 3, thereby reducing the average valence of the vanadium to less than 5 and oxidizing antimony to a valence state of 5.
A method of making a catalyst precursor having vanadium and antimony in oxide form in the atomic ratio of Sb to V in the range from 0.8 to 4, by reacting a vanadium compound with an aqueous hydrogen peroxide solution to form a dispersion containing the monoperoxovanadium ion, VO(O.sub.2).sup.+, in solution, and reacting the latter with an antimony compound which contains Sb having a valence of 3, thereby reducing the average valence of the vanadium to less than 5 and oxidizing antimony to a valence state of 5, wherein the ratio of moles of H.sub.2 O.sub.2 to atoms of V is at least 1.
Dependencies are inferred from the claim text.