Preparation of caprolactam from 6-aminocaproic acid, esters and

Details Preparation of caprolactam from 6-aminocaproic acid, esters and Preparation of caprolactam from 6-aminocaproic acid, esters and

1987-12-15

1988-08-30

Bond, Robert T.

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

Organic compounds

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

C07D20108

Patent

active

047678569

ABSTRACT:
In an improved process for preparing caprolactam by heating 6-aminocaproic acid, an ester or amide or mixture thereof in the presence of an inert reaction medium which is liquid under the reaction conditions and has a boiling point above that of caprolactam, the improvement comprises using as the reaction medium a hydrocarbon, maintaining a temperature of from 150.degree. to 350.degree. C., charging the 6-aminocaproic acid, ester, amide or mixture thereof at a rate commensurate with their rate of conversion, and separating caprolactam from the reaction mixture at a rate commensurate with its rate of formation.

REFERENCES:
patent: 3485821 (1969-12-01), Sheehan
patent: 3857510 (1974-12-01), Rogic et al.
patent: 3988319 (1976-10-01), Mares
patent: 4470928 (1984-09-01), Kimura et al.
patent: 4551528 (1985-11-01), Dockner et al.
Industrial & Engineering Chemistry Process Design and Development vol. 17, No. 1, 1978, Mares and Sheehan, Kinetics of Caprolactam Formation from 6-Aminocaproic Acid, Ester, and Amides.

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