| 摘要 |
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 DEG and 235 DEG 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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