Process for recovery of .epsilon.-caprolactam

Details Process for recovery of .epsilon.-caprolactam Process for recovery of .epsilon.-caprolactam

1974-06-11

1976-03-16

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20116

Patent

active

039445437

ABSTRACT:
Polymerizable quality .epsilon.-caprolactam having an alkalinity of less than 0.05 meq. per kg. of lactam is produced in the improved disclosed process which includes extracting an aqueous lactam-rich solution with an organic solvent having a high distribution coefficient for the lactam with respect to the aqueous solution, and evaporating the lactam-rich organic solvent solution and recovering by distillation the lactam. Evaporation of the organic solvent requires considerably less thermal energy than evaporation of a similar aqueous solution.

REFERENCES:
patent: 2221369 (1940-11-01), Cass
patent: 2758991 (1956-08-01), Kretzers et al.
patent: 3336298 (1967-08-01), De Rooij
patent: 3852272 (1974-12-01), De Rooij
patent: 3852273 (1974-12-01), De Rooij

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