Preparation of vanadium phosphorus catalysts using olefinic halo

Details Preparation of vanadium phosphorus catalysts using olefinic halo Preparation of vanadium phosphorus catalysts using olefinic halo

1981-04-10

1982-09-21

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252437, B01J 2714

Patent

active

043506119

ABSTRACT:
The present invention provides a process for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce high yields of maleic anhydride with good selectivity. A vanadium compound is introduced into an olefinic halogenated organic liquid medium, a phosphorus-containing compound is added to the medium, reduction of at least a portion of the vanadium to a +4 valence state is effected either prior to or subsequent to the addition of the phosphorus-containing compound, and the resulting vanadium-phosphorus oxide catalyst precursor is recovered, dried and calcined.

REFERENCES:
patent: 3864280 (1975-02-01), Schneider
patent: 4016105 (1977-04-01), Ken
patent: 4017521 (1977-04-01), Schneider
patent: 4043943 (1977-08-01), Schneider
patent: 4116868 (1978-09-01), Mount et al.
patent: 4132670 (1979-01-01), Katsumoto et al.

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