Anhydride separation process

Details Anhydride separation process Anhydride separation process

B - Operations, Transporting

01

D

260/374

B01D 19/00 (2006.01) C07C 51/573 (2006.01)

Patent

CA 1057766

ABSTRACT OF THE DISCLOSURE ANHYDRIDE SEPARATION PROCESS 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 nones at a temperature between about 20° and 235°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.

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