Process for production of maleic anhydride

Details Process for production of maleic anhydride Process for production of maleic anhydride

1986-01-27

1987-12-15

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549260, C07D30760

Patent

active

047134640

ABSTRACT:
Catalyst containing a vanadium/phosphorus complex oxide, for the oxidation of hydrocarbons to maleic anhydride. The catalyst contains 1 to 1.3 atoms of phosphorus per atom of vanadium. The pore volume of those pores which have a radius of 100 to 1,000 .ANG. is at least 30 percent of the total pore volume of the pores which have a radius of less than 10,000 .ANG.. The method for preparing the catalyst involves introducing a phosphorus-containing compound into an organic solvent, and continuously adding a vanadium-containing compound over the course of 0.5 to 4 hours. 1 to 1.3 atoms of phosphous is employed per atom of vanadium. The water formed during the reaction is removed continuously and directly from the reaction mixture. Thereafter the reaction mixture is separated. The V-P-O complex oxide is isolated as a solid, dried at a temperature of 90.degree. to 150.degree. C. and activated at a temperature of 200.degree. to 300.degree. C. to provide the catalyst.

REFERENCES:
patent: 4178298 (1979-12-01), Stefani et al.
patent: 4520127 (1985-05-01), Otake et al.
J. S. Littler and W. A. Waters, J. Chem. Soc., (1959), pp. 1299 to 1305.
Koppel et al., Zeit. Anorg. Chem. 45, pp. 346 to 351, (1905).

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