公开(公告)号：CS183740B2

公开(公告)日：1978-07-31

申请号：CS417074

申请日：1974-06-12

Applicant: STAMICARBON

Inventor： GOETTSCH REIJER ,  DE ROOIJ ABRAHAM H

IPC: B01D9/02 ,  C07D201/16

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.

公开(公告)号：HU171342B

公开(公告)日：1977-12-28

申请号：HUSA002353

申请日：1972-05-04

Applicant: STAMICARBON

Inventor： DE ROOIJ ABRAHAM H

IPC: C07D223/02 ,  C07D201/16 ,  C07D295/00

公开(公告)号：CA989831A

公开(公告)日：1976-05-25

申请号：CA141067

申请日：1972-05-02

Applicant: STAMICARBON

Inventor： DE ROOIJ ABRAHAM H

IPC: C07D223/02 ,  C07D201/16