Diamine recovery process

Details Diamine recovery process Diamine recovery process

1981-03-05

1983-04-19

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in two or more physically distinct zones

526 68, 526 70, 526 71, 528335, C08G 6926

Patent

active

043806155

ABSTRACT:
The efficiency of a rectifying zone for the recovery of diamine vapor from water 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.

REFERENCES:
patent: 2163584 (1939-06-01), Carothers et al.
patent: 3185672 (1965-05-01), Clemo et al.
patent: 3296217 (1967-01-01), Tate
patent: 3402152 (1968-09-01), Brignac et al.
patent: 3900450 (1975-08-01), Jaswal et al.
patent: 3937686 (1976-02-01), Augstkalns
patent: 3960820 (1976-06-01), Pinney

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