EP 1087942 A1 20010404 - 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
Application
Priority
- US 9913407 W 19990614
- US 9465098 A 19980615
- US 9465198 A 19980615
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
IPC 8 full level
C07D 201/16 (2006.01)
CPC (source: EP)
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
DOCDB simple family (publication)
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; KR 20010052680 A 20010625; PL 344860 A1 20011119
DOCDB simple family (application)
US 9913407 W 19990614; AU 5082599 A 19990614; BR 9911231 A 19990614; CA 2335114 A 19990614; CN 99809499 A 19990614; EP 99935319 A 19990614; ID 20002616 A 19990614; JP 2000554700 A 19990614; KR 20007013928 A 20001208; PL 34486099 A 19990614