Process for recovery of polyarylpolyamines

Details Process for recovery of polyarylpolyamines Process for recovery of polyarylpolyamines

1983-11-23

1989-01-17

Hines, Robert V.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564330, 564333, C07C 8750

Patent

active

047989092

ABSTRACT:
An arylamine such as aniline is condensed with formaldehyde in the presence of aqueous hydrochloric acid to form a mass containing the hydrogen chloride salt of a polyarylpolyamine. The mass is contacted with additional aniline thereby forming an organic phase and an aqueous phase, the 4,4'-polyarylpolyamine overwhelmingly being liberated from its salt form in the aqueous phase and being transferred to the organic phase. High recoveries of the 4,4'-diamino polycondensate are achieved.

REFERENCES:
patent: 4130588 (1978-12-01), Martin et al.

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