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Citation: MA Lin, XU Di, RUAN Ji-Wu, GU Lian-Quan. Solvent-free Transesterification Catalyzed by Lipase Powder[J]. Chinese Journal of Applied Chemistry, ;2003, 20(9): 853-856. shu

Solvent-free Transesterification Catalyzed by Lipase Powder

1.
School of Chemistry and Chemical Engineering, Zhongshan(Sun Yet-sen) University, Guangzhou 510275

Corresponding author: MA Lin,
Received Date: 24 January 2003
Available Online: 19 May 2003
Fund Project: 国家自然科学基金(20032020)资助项目 (20032020)

The solvent-free transesterification of ethyl decanoate with 1-hexanol has been carried out by cata-lysis through direct mixing of powdered lipase, Rhizopus arrbizus or Candida rugosa, with carrier and substrates. The results showed that water content, amount of silica gel and reaction time affected the rate or yield of the reaction. For a mixture of 25 mg of silica gel, 5 mg of Rhizopus arrbizus lipase powder, 18 μL of 50 mmol/L phosphate buffer(pH=7.0) or 10 mg of Candida rugosa lipase powder, 15 μL of buffer, the both lipases catalyzed reactions proceed readily, and after 20 h, yield greater than 90% could be achieved. The lipase mixed with silica gel can be reused many times.
- lipase,
- silica gel,
- solvent-free reaction,
- transesterification
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