Purification of caprolactam

Details Purification of caprolactam Purification of caprolactam

1976-11-10

1980-12-16

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D 2016

Patent

active

042396824

ABSTRACT:
A process for the purification of acid-containing crude caprolactam obtained by the rearrangement of cyclohexanone oxime, wherein the crude caprolactam is mixed with from 0.8 to 2.0 equivalents of a base, from 3 to 6 parts by weight of toluene, based on caprolactam and from 2 to 10 parts by weight of water, based on inorganic constituents, separating the mixture into a toluene phase and two aqueous phases the upper of which containing all contaminants and discarding this phase.

REFERENCES:
patent: 2221369 (1940-11-01), Cass
patent: 2973355 (1961-02-01), Bauer
patent: 3948888 (1976-04-01), Schwarz et al.

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