Process for the purification of caprolactam

Details Process for the purification of caprolactam Process for the purification of caprolactam

1974-10-31

1976-06-29

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20116

Patent

active

039667120

ABSTRACT:
Object of the invention is a process for the purification of a caprolactam obtained by catalytic rearrangement of cyclohexanone oxime in the gaseous phase comprising crystallization said caprolactam which main impurity consists of cyclohexanone oxime from dimethylformamide, dimethylacetamide, methyl formate, ethyl formate, methyl acetate, tetrahydrofuran, 1,3 dioxane, 1,4 dioxane, propanol, butanol or amyl alcohol or from a mixture of these solvents, followed by distillation.

REFERENCES:
patent: 2988546 (1961-06-01), Lippincott et al.
patent: 3347852 (1967-10-01), Ishikawa et al.
patent: 3476744 (1969-11-01), Berther et al.
patent: 3485820 (1969-12-01), Hofmann et al.

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