Process for the production of anhydrides

Details Process for the production of anhydrides Process for the production of anhydrides

1990-10-31

1992-06-30

Shen, Cecilia

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549231, 549232, 549233, 549247, 549248, 549249, 549256, 549257, 549258, 549259, 549260, 549261, C07D30760

Patent

active

051264633

ABSTRACT:
This invention provides a process for the production of an anhydride by the vapor phase reaction of a hydrocarbon with substantially pure oxygen in the presence of a suitable catalyst. In the improved process, the anhydride product is removed, carbon monoxide, present in the reactor effluent as a by-product, is oxidized to carbon dioxide and part of the gaseous effluent, comprised mainly of carbon dioxide and unreacted hydrocarbon, is recycled to the reactor. Removal of carbon monoxide from the recycle stream reduces the hazard of a fire or explosion in the reactor or associated equipment. The use of carbon dioxide as the principal diluent increases heat removal from the reactor, thereby increasing the production capacity of the reactor.

REFERENCES:
patent: 3904652 (1975-09-01), Frank
patent: 4231943 (1980-11-01), Paradis et al.
patent: 4352755 (1982-10-01), Higgins et al.
patent: 4515973 (1985-05-01), Wrobleski
patent: 4562268 (1985-12-01), Wrobleski et al.
patent: 4699985 (1987-10-01), Bither, Jr.
patent: 4987239 (1991-01-01), Ramachandran et al.

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