Process for the purification of .epsilon.-caprolactam

Details Process for the purification of .epsilon.-caprolactam Process for the purification of .epsilon.-caprolactam

1982-05-07

1984-07-03

Sever, Frank

Distillation: processes, separatory

Plural distillations performed on same material

One a filming distillation

203 74, 203 89, 203 91, 203100, 2602393A, B01D 310, B01D 314

Patent

active

044578075

ABSTRACT:
A process is provided for recovering epsilon-caprolactam of a purity in excess of 99.9 wt. %, in a two-stage distillation operation. Each stage comprises an evaporator and a rectification column having a pressure drop across the theoretical trays thereof of less than about 2.5 MBAR.

REFERENCES:
patent: 3686077 (1972-08-01), Dekoning
patent: 3939153 (1976-02-01), Fowler
patent: 4326925 (1982-04-01), Senni et al.

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