Processing polycaprolactam extraction liquors

Details Processing polycaprolactam extraction liquors Processing polycaprolactam extraction liquors

1975-03-20

1976-11-16

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 78S, 159 47UA, 159 47R, 159 47WL, C07D20116

Patent

active

039923720

ABSTRACT:
A process for processing polycaprolactam extraction liquors by evaporation of water and distillation of the residue in which the evaporation of water is carried out in a plurality of stages and the evaporation energy for the removal of the bulk of the water is taken from the heat liberated in the rearrangement of cyclohexanone oxime to caprolactam in oleum or sulfuric acid by using the extraction water for cooling the rearrangement mixture and utilizing the heat absorbed by the extraction water for the concentration of this extraction water by evaporation of water.

REFERENCES:
patent: 2221369 (1946-11-01), Cass
patent: 2249177 (1941-07-01), Schlack
patent: 2749212 (1956-06-01), Crowder
patent: 2839122 (1958-06-01), Laguilharre
patent: 3439724 (1969-04-01), Mason

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