Global Patent Index - EP 1087942 A1

EP 1087942 A1 2001-04-04 - SEPARATION OF EPSILON CAPROLACTAM FROM ISOMERS

Title (en)

SEPARATION OF EPSILON CAPROLACTAM FROM ISOMERS

Title (de)

EPSILON-CAPROLACTAM-TRENNUNG VON ISOMEREN

Title (fr)

SEPARATION D'EPSILON-CAPROLACTAME D'ISOMERES

Publication

EP 1087942 A1 (EN)

Application

EP 99935319 A

Priority

  • US 9913407 W
  • US 9465098 A
  • US 9465198 A

Abstract (en)

[origin: WO9965873A1] This invention relates to a process for separating epsilon caprolactam from a feed mixture comprising epsilon caprolactam and one or more epsilon caprolactam isomers selected from the group consisting of 4-ethyl-2-pyrrolidinone, 5-methyl-2-piperdinone, 3-ethyl-2-pyrrolidinone and 3-methyl-2-piperdinone or octahydrophenazine which process comprises contacting under adsorption conditions said mixture with an adsorbent, selectively adsorbing said epsilon caprolactam isomers or octahydrophenazine to substantial exclusion of said epsilon caprolactam, removing the non-adsorbed portion of the feed mixture from contact with the adsorbent, and thereafter recovering high purity epsilon caprolactam. The epsilon caprolactam isomers or octahydrophenazine can be recovered by desorption under desorption conditions. The process can be conducted in a batch or semi-batch manner or in a continuous manner using moving bed or simulated moving bed technologies.

IPC 1-7 (main, further and additional classification)

C07D 201/16

IPC 8 full level (invention and additional information)

C07D 201/16 (2006.01)

CPC (invention and additional information)

C07D 201/16 (2013.01)

Citation (search report)

See references of WO 9965873A1

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IT LI MC NL PT SE

EPO simple patent family

WO 9965873 A1 19991223; AU 5082599 A 20000105; BR 9911231 A 20010306; CA 2335114 A1 19991223; CN 1312798 A 20010912; EP 1087942 A1 20010404; ID 29234 A 20010816; JP 2002518372 A 20020625; PL 344860 A1 20011119

INPADOC legal status


2001-08-29 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20010703

2001-04-04 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001122

2001-04-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FR GB GR IT LI MC NL PT SE