Process for the preparation of a mixture of .epsilon.-caprolacta

Details Process for the preparation of a mixture of .epsilon.-caprolacta Process for the preparation of a mixture of .epsilon.-caprolacta

1998-08-21

2000-01-04

Shah, Mukund J.

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

Organic compounds

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

540538, C07D20112, C07D20102, C07D20108

Patent

active

060111534

ABSTRACT:
Process for the preparation of a mixture of .epsilon.-caprolactam, 6-aminocaproic acid and 6-aminocaproic amide by heating an aqueous mixture containing ammonia and oligomers of 6-aminocaproic acid and/or of 6-aminocaproic amide, the aqueous mixture containing 0.5-7 wt. % of equivalent ammonia (calculated as NH.sub.3) and the temperature lying between 280.degree. C. and 330.degree. C., in which by "equivalent ammonia" is meant free ammonia and ammonia present in the form of a terminal amide group of one of the compounds present in the aqueous mixture.

REFERENCES:
patent: 3485821 (1969-12-01), Sheehan et al.
patent: 4599199 (1986-07-01), Fuchs et al.
patent: 4730040 (1988-03-01), Vagt et al.
patent: 5395974 (1995-03-01), McKinney
Abstract JP 47010715, Mar. 30, 1972.

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