Process for producing maleic anhydride

Details Process for producing maleic anhydride Process for producing maleic anhydride

1998-07-21

2000-07-25

Dentz, Bernard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549256, 549258, 549262, C07D30734

Patent

active

060938358

ABSTRACT:
A process for producing maleic anhydride is described, which comprises (i) reacting a hydrocarbon with oxygen in a vapor phase in the presence of a catalyst to yield a reaction mixture gas containing maleic anhydride, (ii) bringing the reaction mixture gas into contact with an organic solvent to collect the maleic anhydride in the organic solvent, (iii) separating at least part of the maleic anhydride from the organic solvent, (iv) washing with an aqueous alkali solution at least part of the organic solvent from which maleic anhydride has been separated, and (v) reusing the resultant washed organic solvent and the residual organic solvent for contact with the reaction mixture gas.

REFERENCES:
patent: 4118403 (1978-10-01), White
patent: 4472527 (1984-09-01), Otake et al.
patent: 4520127 (1985-05-01), Otake et al.
patent: 5631387 (1997-05-01), Brown et al.
Gabriele Centi, et al., "Mechanistic Aspects of Maleic Anhydride Synthesis from C.sub.4 Hydrocarbons over Phosphorus Vanadium Oxide," Chem. Rev. 1988, 88, pp. 55-80.
European Search Report issued on Mar. 4, 1999, in corresponding PCT Application No. 98 11 3683.

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