Process for the manufacture of maleic anhydride

Details Process for the manufacture of maleic anhydride Process for the manufacture of maleic anhydride

1993-03-15

1994-02-22

Dentz, Bernard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

502209, C07D30760

Patent

active

052888800

ABSTRACT:
The present invention provides a process for the manufacture of maleic anhydride by the vapor phase catalytic oxidation of n-butane with molecular oxygen by the use of a specially prepared phosphorus vanadium-oxygen composite catalyst containing specific kind of a divalent metal. The catalyst used in the present invention is prepared from a mixture of vanadyl hydrogen orthophosphate and at least one compound selected from the group consisting of a divalent metal hydrogen orthophosphate (Divalent metal is selected from Mg, Ca, Ba, Mn, Fe, Co, Ni, Cu, and Zn.), a divalent metal ammonium orthophosphate (Divalent metal is the same as above.), and a divalent metal orthophosphate (Divalent metal is the same as above.), with the atomic ratio of the divalent metal/vanadium of 0.003-0.5, by calcining the mixture at 300.degree.-400.degree. C., and then pretreating said catalyst in an inert gas or a mixed gas containing n butane and molecular oxygen at 350.degree.-700.degree. C. Maleic anhydride can be manufactured at a high conversion, a high selectivity and a high yield according to the present invention.

REFERENCES:
patent: 3862146 (1975-01-01), Boghosian
patent: 3987063 (1976-10-01), Lemal et al.
Shokubai, vol. 33, No. 2 pp. 115-118 (1991).

Affiliated with

Also associated with

Rating

Process for the manufacture of maleic anhydride does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the manufacture of maleic anhydride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the manufacture of maleic anhydride will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-172684