Process for the distillation of a mixture of isomeric...

Details Process for the distillation of a mixture of isomeric... Process for the distillation of a mixture of isomeric...

C - Chemistry, Metallurgy

07

C

C07C 263/18 (2006.01) B01D 3/14 (2006.01) C07B 63/00 (2006.01) C07C 263/20 (2006.01) C07C 265/14 (2006.01)

Patent

CA 2466464

A mixture of isomeric diisocyanatodiphenylmethanes composed of at least 2,2'-diisocyanato-diphenylmethane, 2,4'-diisocyanatodiphenylmethane and 4,4'-diisocyanatodiphenyl-methane is distilled in at least one stage and a divided-wall column is used in at least one distillation stage.

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