Catalyst for oxidation reactions and process for its production

Details Catalyst for oxidation reactions and process for its production Catalyst for oxidation reactions and process for its production

1985-10-18

1987-05-26

Dees, Carl F.

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

Catalyst or precursor therefor

Phosphorus or compound containing same

502170, 502172, 502201, 502202, B01J 27198, B01J 3100, B01J 2102

Patent

active

046686525

ABSTRACT:
Catalyst containing a vanadium/phosphorus complex oxide, for the oxidation of hydrocarbons to maleic anhydride. The catalyst contains 1 to 1.3 atoms of phosphorus per atom of vanadium. The pore volume of those pores which have a radius of 100 to 1,000 .ANG. is at least 30 percent of the total pore volume of the pores which have a radius of less than 10,000 .ANG.. The method for preparing the catalyst involves introducing a phosphorus-containing compound into an organic solvent, and continuously adding a vanadium-containing compound over the course of 0.5 to 4 hours. 1 to 1.3 atoms of phosphorus is employed per atom of vanadium. The water formed during the reaction is removed continuously and directly from the reaction mixture. Thereafter the reaction mixture is separated. The V-P-O complex oxide is isolated as a solid, dried at a temperature of 90.degree. to 150.degree. C. and activated at a temperature of 200.degree. to 300.degree. C. to provide the catalyst.

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