Process for the recovery of 2-pyrrolidone

Details Process for the recovery of 2-pyrrolidone Process for the recovery of 2-pyrrolidone

1978-11-28

1980-08-05

Tovar, Jose

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20726

Patent

active

042161517

ABSTRACT:
A process for the recovery of 2-pyrrolidone from the aqueous reaction product obtained in the preparation of 2-pyrrolidone from the hydrogenation of succinonitrile and subsequent reaction with water of the hydrogenation product thus obtained. The aqueous reaction mixture is adjusted to a pH value of 7 or lower and extracted with chloroform or methylene chloride to form an organic phase containing substantially all of the 2-pyrrolidone. The 2-pyrrolidone can be recovered from the organic phase by distillation, or by further extraction with water followed by crystallization from the aqueous phase thus formed or by evaporation of water.

REFERENCES:
patent: 3966763 (1976-06-01), Greene
patent: 4014900 (1977-03-01), Pusztaszeri
patent: 4036836 (1977-07-01), Greene
patent: 4042599 (1977-08-01), Greene
patent: 4050994 (1977-09-01), Anshus
patent: 4123438 (1978-10-01), Geurts et al.

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