Citation:
GAN Zheng-Yan, WUMANJIANG Eli, JIA Dian-Zeng, Xamxi Kamar. Lipase Catalyzed Hydrolysis of Safflower Oil in a Solvent-free Medium[J]. Chinese Journal of Applied Chemistry,
;2006, 23(8): 902-906.
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Enzymatic hydrolysis of safflower oil catalyzed by a lipase from Aspergillus niger was investigated in a solvent-free system,and the effect of reaction time on the hydrolysis was studied.In addition,the selectivity of the lipase was also examined by testing the monoglycerides content in the ester and the iodine values(Ⅳ) of the fatty acid and the ester.The experiment showed that the optimum conditions for an 1 h reaction were m(H2O):m(oil)=0.5:1,m(lipase):m(oil)=5:100,35℃,pH=7.0 and 0.2% CaCl2 and the optimum conditions for an 24 h reaction were m(H2O):m(oil)=1:1,m(lipase):m(oil)=1:100,26℃,pH=7.6 and no CaCl2.The lipase has no selectivity on either the fatty acid or the site of the ester bond on the acylglycerol.
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Keywords:
- hydrolysis,
- safflower oil,
- solvent-free medium,
- lipase
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