Method for producing high-purity caprolactam

Details Method for producing high-purity caprolactam Method for producing high-purity caprolactam

1989-03-30

1990-02-13

Bond, Robert T.

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

Organic compounds

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

C07D20116

Patent

active

049008218

ABSTRACT:
A method for producing high-purity caprolactam from a mixture comprising a melt of crude caprolactam and water, which comprises cooling the mixture in a crystallizer under a reduced pressure of from 1 to 22 Torr while maintaining the water concentration in the mixture at a level of from 0.5 to 10% by weight, to crystallize high-purity caprolactam, and then separating the resulting crystals.

REFERENCES:
patent: 2813858 (1987-11-01), Joris
patent: 3426744 (1969-11-01), Berther et al.

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