Title:
ラクタムの精製法
Document Type and Number:
Japanese Patent JP4234928
Kind Code:
B2
Abstract:
A lactam of high purity is recovered by using three distillation columns. A lactam is purified by cyclizing hydrolysis of an aminonitrile which consists of the elimination of ammonia and possibly solvent. The lactam is then recovered by distillation in the presence of a base, and from the distillation is recovered a head fraction comprising compounds more volatile than the lactam, a fraction comprising the lactam of high purity and a tail fraction comprising a lactam and compounds of boiling points greater than the lactam. The tail fraction is treated to recover most of the lactam which is recycled. An independent claim is also included for the installation to effect the process.
Inventors:
Daniel Amoros
Philippe Lecomte
Pierre Cocle
Philippe Lecomte
Pierre Cocle
Application Number:
JP2001586254A
Publication Date:
March 04, 2009
Filing Date:
May 28, 2001
Export Citation:
Assignee:
Rhodia Polyamide Intermedium
International Classes:
C07D201/16; C07D201/08; C07D223/12; C07D223/10
Domestic Patent References:
| JP10511668A | ||||
| JP57016860A | ||||
| JP56008360A | ||||
| JP1132558A | ||||
| JP57042684A |
Foreign References:
| WO1998005636A1 |
Attorney, Agent or Firm:
Motohiro Kurauchi
Hiroshi Kazama
Hiroshi Kazama