Anhydride separation process

Details Anhydride separation process Anhydride separation process

1976-08-06

1978-01-31

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26034675, 2603467, C07D30760, C07D30789

Patent

active

040715400

ABSTRACT:
An absorption process for separating a maleic or phthalic anhydride from a gaseous mixture containing the anhydride which comprises contacting the gaseous mixture with a liquid absorbent comprising polymethylbenzophenones, at least a portion of which benzophenones contain at least 3 methyl groups, at a temperature for the absorbent between about 20.degree. and 235.degree. C and at a pressure sufficient to effect absorption of the anhydride into the absorbent. Preferably the absorption process is used to remove maleic anhydride from a gas stream, preferably the absorbent includes dixylylketone, and preferably the absorption is carried out by countercurrent contacting in an absorber column.

REFERENCES:
patent: 3850758 (1974-11-01), Smith et al.
patent: 3891680 (1975-06-01), Katsumoto et al.

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