METHOD OF SYNTHESIS CATALYSTS BASED ON VANADIUM ANTIMONATE USING SnO•xHO Russian patent published in 2003 - IPC

FIELD: chemical technology, catalysts. SUBSTANCE: invention relates to method of synthesis of tin-containing vanadium-antimony catalysts useful for catalytic ammoxidation of C₃-C₅-paraffins or olefins, particularly, to synthesis of catalysts used for ammoxidation of propane or isobutene or propylene or isobutylene to yield corresponding α,β- unsaturated mononitrile, acrylonitrile or methacrylonitrile. Invention describes method of synthesis of catalyst containing vanadium, antimony, tin and titanium in oxidized state that involves preparing aqueous suspension of parent substances as a charge containing compounds of elements to be incorporation in final catalyst, drying mixture and its calcination to form active catalyst. The source of charging tin is a solution containing SnO₂•xH₂O where n ≥ 0 dispersed in tetraalkylammonium hydroxide defined by the following formula: (C₂H_2n+1)₄NOH where 5 ≥ n ≥ 1. Invention describes also method of synthesis of catalyst of definite empirical formula and providing drying carrying out and calcinations up to 500 C and also methods of synthesis of α,β-unsaturated mononitrile in the presence of catalysts synthesized by the above described methods. EFFECT: enhanced activity and selectivity of catalyst. 16 cl, 2 ex