Enantioselective Esterification of(DL)-Menthol by Lipase in Ionic Liquid[BMIM][PF

化学工业与工程

Chemcial Industry and Engineering

2008, Vol. 25

Issue (6) :493-498 DOI:

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Enantioselective Esterification of(DL)-Menthol by Lipase in Ionic Liquid[BMIM][PF_6]

YUAN Yi,JIANG Xiao-yan(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)

(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

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Abstract Enantioselective esterification of(DL)-menthol by Candida rugosa lipase was studied in ionic liquid of 1-butyl-3-methyl-imidazolium hexafluorophosphate and hexane respectively using propionic anhydride as an acylating agent.It was found that the reaction rate was much higher in the ionic liquid than those in hexane.Moreover,the conversion and enantioselectivity in the ionic liquid were also higher than that in hexane.Maximal percentage of conversion was obtained in 2 h to 8 h in the ionic liquid when the enzyme load was higher than 130 U/mL.In hexane,the reaction percentage of conversion did not reach a maximum point when the enzyme load was as high as 167 U/mL.Moreover,higher water content in the ionic liquid was favorable for obtaining higher enantioselectivity,however it lowered the reaction rate and(DL)-menthol conversion.

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Received 2008-11-15; published 2008-11-15

Cite this article:

YUAN Yi,JIANG Xiao-yan.Enantioselective Esterification of(DL)-Menthol by Lipase in Ionic Liquid[BMIM][PF_6][J] Chemcial Industry and Engineering, 2008,V25(6): 493-498

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