Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1994-02-28
1996-03-12
Prescott, Arthur C.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
2101982, 210659, 562608, B01D 1508
Patent
active
054987520
ABSTRACT:
A process for recovering and reusing a solvent and optical isomers, characterized by using a simulated moving packed bed which comprises an inlet for an eluent, an outlet for an extract containing an optical isomer strongly adsorbable on the packing, an inlet for a liquid containing an optical isomer mixture and an outlet for a raffinate containing an optical isomer weakly adsorbable on the packing in this order in a packed bed containing packings for optical resolution and arranged in a solvent circulation passage, and in which the inlets and the outlets are intermittently and successively moved in the direction of liquid flow in the packed bed: recovering the solvent and the optical isomer(s) from The resultant extract and/or raffinate; returning the recovered solvent into the solvent circulation passage; or when the solvent is not recovered, heating the extract or raffinate to racemize an undesired optical isomer and reusing the resultant solution containing a racemic modification for the separation of the optical isomers with the simulated moving bed system.
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UOP Sorbex Processes, Nikki Universal Co., Ltd., Oct., 1989.
Negawa Masakazu
Shoji Fumihiko
Daicel Chemical Industries Ltd.
Prescott Arthur C.
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