Diamine recovery process

Details Diamine recovery process Diamine recovery process

C - Chemistry, Metallurgy

08

G

402/234, 202/70,

C08G 69/26 (2006.01) B01D 3/32 (2006.01) C08G 69/28 (2006.01)

Patent

CA 1186339

ABSTRACT OF THE DISCLOSURE The efficiency of a rectifying zone for the recovery of diamine vapor from waler vapor being separated from a reaction zone in which a polyamide- forming salt is being heated to form a prepolymer is improved by adding a dicarboxylic acid to the reflux water at the top of the rectifying zone.

397565

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