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Position: Home > Articles > Synthesis of L-ascorbyl palmitate catalyzed by lipase Science and Technology of Food Industry 2011 (8) 350-352+417

L-抗坏血酸棕榈酸酯的酶法合成

作  者:
李红;陶静;李颖
单  位:
郑州轻工业学院食品与生物工程学院
关键词:
L-抗坏血酸棕榈酸酯;Novozyme435;叔戊醇;四丁基溴化铵
摘  要:
详细研究了脂肪酶在有机溶剂中催化合成L-抗坏血酸棕榈酸酯的反应,并且对影响产物浓度的几种主要因素进行讨论(如脂肪酶、溶剂、温度、底物比、添加剂),首次通过加入相转移剂提高反应产物浓度,确定了合成L-抗坏血酸棕榈酸酯的最适反应条件:3mL叔戊醇为溶剂,催化剂为Novozyme435,其最佳用量为0.05g,底物棕榈酸与抗坏血酸摩尔比3:1,0.3g4A分子筛作为吸水剂,0.3g四丁基溴化铵作为相转移剂,反应温度50℃,反应时间72h,得到产物浓度为16.6mg/mL。
译  名:
Synthesis of L-ascorbyl palmitate catalyzed by lipase
作  者:
LI Hong,TAO Jing,LI Ying(School of Food and Biological Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)
关键词:
L-ascorbyl palmitate;Novozyme 435;tert-amyl alcohol;tetrabutylammonium bromide
摘  要:
The synthesis of L-ascorbyl palmitate catalyzed by lipase in organic phase was studied.The optimized process conditions,such as enzyme,solvent,temperature,reactants and additive were determined.In the presence of 0.05g Novozyme435 as catalyst,0.3g of 4A molecular sieve and 0.3g of n-Bu4NBr as additive in 3mL tert-amyl alcohol at 50℃,16.6mg/mL of L-ascorbyl palmitate was obtained in the reaction of palmitic acid and VC with the molar ratio of 3:1 after 72h.

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