Title:
PROCESS FOR SEPARATING OPTICAL ISOMERS
Document Type and Number:
WIPO Patent Application WO/1991/013046
Kind Code:
A1
Abstract:
A process for separating optical isomers in a pseudo-moving bed system, which comprises introducing a solution containing an optical isomer mixture and a desorbing liquid into a packed bed containing an optical resolution packing therein and having front and rear ends thereof connected to each other endlessly via a fluid passage to circulate a fluid unidirectionally and at the same time drawing out a solution containing one of the separated isomers and another solution containing the other isomer from the packed bed, wherein a port (13) for introducing a desorbing liquid, a port (14) for drawing out a solution containing a readily adsorbable optical isomer, i.e. an extract, a port (15) for introducing a solution containing an optical isomer mixture, and a port (16) for drawing out a solution containing a difficultly adsorbable optical isomer, i.e. a raffinate, are arranged in the packed bed in this order along the direction of fluid flow and the positions of these ports are successively moved in the direction of fluid flow in the packed bed intermittently. The industrial effect of this invention is remarkably excellent, because this process allows an optical isomer mixture to be separated continuously and efficiently, works well even with a reduced amount of a desorbing liquid used, and can deal with a large amount of optical isomers.
Inventors:
YAMASHITA AKIRA (JP)
SHOJI FUMIHIKO (JP)
SHOJI FUMIHIKO (JP)
Application Number:
PCT/JP1991/000213
Publication Date:
September 05, 1991
Filing Date:
February 20, 1991
Export Citation:
Assignee:
DAICEL CHEM (JP)
International Classes:
C07B57/00; C07C29/76; C07C33/22; C07C67/56; C07C69/16; B01D15/00; (IPC1-7): B01D15/00; C07B57/00; C07C29/76; C07C33/22; C07C67/56; C07C69/16
Foreign References:
| JPS5820208A | 1983-02-05 | |||
| US4402832A | 1983-09-06 | |||
| JPS6485106A | 1989-03-30 | |||
| GB2167052A | 1986-05-21 | |||
| JPH01216943A | 1989-08-30 | |||
| JPH01202658A | 1989-08-15 | |||
| JPH01199643A | 1989-08-11 | |||
| JPH01163654A | 1989-06-27 |
Other References:
See also references of EP 0471082A1
Attorney, Agent or Firm:
Furuya, Kaoru (1-8-11 Nihonbashi-Horidomech, Chuo-ku Tokyo 103, JP)
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