【摘要】 在有机溶剂中,以脂肪酶Novo435为催化剂,蔗糖八乙酸 酯与油酸乙酯通过转酯化反应合成了同时含有油酸酰基 和乙酸酰基的混合型蔗糖酯,当蔗糖八乙酸酯与油酸乙酯 的物质的量之比为1:1时,油酸乙酯的转化率达95％。正 交实验给出该转酯化反应的最适条件是:以叔戊醇为反应 介质,反应温度为40℃,脂肪酶用量为5000U／1mmol蔗 糖酯,分子筛用量为500mg/1mmol蔗糖酯。更多还原

【Abstract】 The synthesis of sucrose ester containing ethanoyl and oleoyl was performed by transesterification between sucrose octaacetate and ethyi oleate in organic solvents, using lipases Novo435 as the catalyst. An ethyl oleate conversion of 95% can be obtained as molar rate of sucrose octaacetate to ethyl oleate is 1:1. The result of orthogonal experiment indicated that the best transesterification condition is to use 2-methyl-2-butanol as solvent, reaction temperature 40℃, lipases 5000U and sieves 500mg to 1mmol sucrose ester.更多还原