Purification of crude caprolactam

Details Purification of crude caprolactam Purification of crude caprolactam

1979-09-24

1981-02-03

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20116

Patent

active

042487811

ABSTRACT:
A process for purifying crude caprolactam which has been obtained by rearrangement of cyclohexanone-oxime in the gas phase over a catalyst containing boron trioxide, wherein caprolactam is crystallized out, by cooling, from a melt which contains, per 100 parts by weight of crude caprolactam, from 5 to 30 parts by weight of primary alkanols or fatty acids which have a carbon chain of 6 to 10 carbon atoms and are substituted by alkyl radicals of 1 to 5 carbon atoms, and from 0 to 5 parts by weight of water, and is separated from the mother liquor.

REFERENCES:
patent: 2813858 (1957-11-01), Joris
patent: 3476744 (1969-11-01), Berther

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