Preparation of vanadium phosphorus catalysts

Details Preparation of vanadium phosphorus catalysts Preparation of vanadium phosphorus catalysts

1980-05-19

1981-10-13

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252437, B01J 2714

Patent

active

042947227

ABSTRACT:
The present invention provides a method 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 improved yields of maleic anhydride with good selectivity. A vanadium compound is at least partially solubilized in an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, and unsolubilized vanadium having a particle size larger than about 0.1 mm diameter is removed from the medium before addition of a phosphorus-containing compound.

REFERENCES:
patent: 3385796 (1968-05-01), Kerr
patent: 3474041 (1969-10-01), Kerr
patent: 4002650 (1977-01-01), Bremer et al.
patent: 4016105 (1977-04-01), Kerr
patent: 4043943 (1977-08-01), Schneider
patent: 4064070 (1977-12-01), Harrison
patent: 4132670 (1979-01-01), Katsumoto et al.
patent: 4153577 (1979-05-01), Barone
patent: 4179404 (1979-12-01), Barone

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