Process for the preparation of maleic anhydride catalyst

Details Process for the preparation of maleic anhydride catalyst Process for the preparation of maleic anhydride catalyst

1977-07-29

1979-05-15

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

26034675, B01J 2714, C07D30789

Patent

active

041547039

ABSTRACT:
Maleic anhydride is prepared by the catalytic oxidation of unsaturated hydrocarbons having 4 to 6 carbon atoms, at a temperature of from 350.degree. to 500.degree. C., in the presence of a catalyst which is produced by a method wherein a mixture of a titanium oxide and a vanadium compound in an atomic ratio of from 1 to 15 is calcined at a temperature of from 630.degree. to 1000.degree. C. to prepare a precursory catalyst, and wherein a gas mixture containing an organic phosphorus compound and a carrier gas is brought into contact with a mass of the percursory catalyst at a supply rate of the phosphorus compound being from 0.01 to 10 millimoles/hr per 1 ml of the mass of the percursory catalyst and at a temperature of from 350.degree. to 600.degree. C. during when a total amount of from 0.3 to 30 millimoles of the phosphorus compound per 1 ml of the mass of the precursory catalyst passes through the mass of the precursory catalyst.

REFERENCES:
patent: B356887 (1975-01-01), Schneider
patent: 3894971 (1975-07-01), Reuter
patent: 3907833 (1975-09-01), Slinkard et al.

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