Recovery of N-methyl-2-pyrrolidone

Details Recovery of N-methyl-2-pyrrolidone Recovery of N-methyl-2-pyrrolidone

1989-03-03

1989-08-22

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20116, C07D207267

Patent

active

048597813

ABSTRACT:
In a process for recovery N-methyl-2-pyrrolidone from a liquid aqueous medium (preferably a brine) by liquid-liquid extraction, the improvement comprises using a branched aliphatic C5-C7 alcohol as extractant. In a particular embodiment, the liquid aqueous medium is an effluent from a poly(arylene sulfide) process.

REFERENCES:
patent: 3290329 (1966-12-01), Doerfel
patent: 3687907 (1972-08-01), Crouch et al.
patent: 3697487 (1972-10-01), Cines
patent: 4501902 (1985-02-01), Clearly

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