| 摘要 |
PROBLEM TO BE SOLVED: To readily obtain the subject separating agent capable of separating an optical isomer useful for agrochemicals, medicines, etc., and having strong mechanical strengths by modifying a hydroxy group of a zeolite with an optically active compound. SOLUTION: The objective separating agent is obtained by treating a hydroxy group of a zeolite (especially, a faujasite-type or aβ-type zeolite) especially having >=2.1 ratio of silica/alumina (mol/mol) and preferably subjected to a dealuminination treatment with a chlorinating agent such as thionyl chloride, and modifying the chlorinated site with 1-40 wt.% optically active compound (e.g. an optically active alcohol and an optically active hydroxycarboxylic acid) based on the weight of the zeolite before the modification. Especially an optical isomer of a carboxylic acid or a derivative thereof can be separated by using the separating agent in a batch type and/or a moving bed type method.
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