Oxide catalyst and process for producing maleic anhydride by usi

Details Oxide catalyst and process for producing maleic anhydride by usi Oxide catalyst and process for producing maleic anhydride by usi

1994-06-27

1996-03-12

Dentz, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549260, 502209, B01J 27198

Patent

active

054987318

ABSTRACT:
An oxide catalyst for producing maleic anhydride by vapor phase oxidation of a hydrocarbon having 4 carbon atoms, obtainable by (1) reacting a pentavalent vanadium compound and a pentavalent phosphorus compound in an organic solvent in the presence of a reducing agent capable of reducing the pentavalent vanadium to the tetravalent state to produce the crystalline composite oxide particles containing tetravalent vanadium and pentavalent phosphorus, (2) dry-pulverizing the obtained crystalline composite oxide particles in a high-speed gas flow, (3) mixing the pulverized particles with an aqueous solution containing tetravalent vanadium and pentavalent phosphorus to form a slurry, and (4) spray-drying the slurry and then calcining.

REFERENCES:
patent: 4351773 (1982-09-01), Milberger et al.
patent: 4472527 (1984-09-01), Otake et al.
patent: 4510258 (1985-04-01), Suciu et al.

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