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Chemistry and Industry of Forest Products ›› 2015, Vol. 35 ›› Issue (1): 45-50.doi: 10.3969/j.issn.0253-2417.2015.01.007

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Catalytic Synthesis of Terpene Alcohol Aromatic Ester with Carica papaya Lipase in Non-aqueous System

SU Er-zheng1, YOU Peng-yong2, WEI Dong-zhi2   

  1. 1. Enzyme & Fermentation Technology Laboratory, College of Light Industry Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
    2. New World Institute of Biotechnology, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2014-02-25 Online:2015-02-25 Published:2015-03-05

Abstract: In order to establish economic, green and efficient synthesis process of terpene alcohol aromatic ester, naturally immobilized Carica papaya lipase (CPL) was prepared from the crude papain, and was used to catalyze the synthesis of terpene alcohol aromatic ester in non-aqueous system. The effects of terpene alcohol type, organic solvent type, and initial water activity on the CPL catalyzed reaction were investigated. The results showed that the primary terpene alcohols (geraniol and citronellol) were more suitable substrates, solvents with moderate polarity such as n-hexane were suitable reaction medium, and initial water activity of 0.328 benefitted the catalytic activity of CPL in organic solvents. Under these conditions, the substrate conversion rate was 95.2%, which was similar to those of commercial lipases. The reusability of CPL in organic solvent was poor. Three treatment methods by introduction of the ionic liquid were investigated on their effects on CPL catalyzed performance. It was found that wrapping the CPL with trace amount of ionic liquid before use could significantly enhance the CPL stability. The catalytic activity of CPL still remained more than 90% after being used in the organic solvent for 15 batches.

Key words: non-aqueous system, Carica papaya lipase, terpene alcohol, aromatic ester

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