Process for preparing phosphorus-vanadium mixed oxide catalysts

Details Process for preparing phosphorus-vanadium mixed oxide catalysts Process for preparing phosphorus-vanadium mixed oxide catalysts

1983-12-28

1985-07-09

Gantz, D. E.

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

Catalyst or precursor therefor

Phosphorus or compound containing same

549259, B01J 2714, C07D30760

Patent

active

045282803

ABSTRACT:
Phosphorus-vanadium mixed oxide catalysts are prepared by contacting a tetravalent vanadium compound, dissolved in an aqueous, non-oxidizing acid medium, with crystalline diphosphoric acid to form a phosphorus-vanadium mixed oxide catalyst precursor. The resulting catalyst precursor-containing solution is subjected to a series of concentration/dilution cycles to induce crystallization of the catalyst precursor. The crystals are collected, dried, formed into desired structures, and calcined at temperatures from about 300.degree. C. to about 600.degree. C.

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