Process for recovering caprolactam

Details Process for recovering caprolactam Process for recovering caprolactam

2006-11-28

2006-11-28

Kifle, Bruck (Department: 1624)

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

Reexamination Certificate

active

07141668

ABSTRACT:
The invention relates to a process for recovering caprolactam from a mixture comprising caprolactam, water, light and heavy components, by subjecting the mixture to a first vacuum distillation resulting in a first bottom product comprising heavy components and caprolactam and in a fist overhead product comprising caprolactam, water, unsaturated lactams and light components; and subjecting at least part of the unsaturated lactams to a hydrogenation.

REFERENCES:
patent: 4457807 (1984-07-01), Rulkens
patent: 4563308 (1986-01-01), Plantema
patent: 4882430 (1989-11-01), Neubauer

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