Process for the production of polyamine mixtures of the polyamin

Details Process for the production of polyamine mixtures of the polyamin Process for the production of polyamine mixtures of the polyamin

1992-05-01

1994-05-10

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521155, 564331, 564333, 564335, C08G 1800

Patent

active

053107691

ABSTRACT:
A process for production of polyamines of the diphenylmethane series through a condensation reaction of aniline with formaldehyde in the presence of an acid catalyst, neutralization of the acid catalyst after reaction completion, and distillation of the resultant polyamine mixture is described. The key feature of the process is the abrupt increase in reaction temperature after the condensation reaction or after the first rearrangement step.

REFERENCES:
patent: 2683730 (1954-07-01), Seeger et al.
patent: 4259526 (1981-03-01), Dunlap et al.
Chemical Abstracts, vol. 86, No. 4, Jan. 24, 1977, Abstract No. 17282s.

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