摘要
研究了以纳米稀土复合固体超强酸SO42-/ZrO2-Nd2O3为催化剂,以乳酸和正丁醇为原料合成乳酸正丁酯。通过正交实验考察了影响酯化反应的主要因素,确定的最佳合成条件为:乳酸用量为0.1mol时,正丁醇与乳酸物质的量之比为3.0∶1,催化剂用量为0.55g,带水剂环己烷15mL,回流反应2.0h,酯化率可达98.7%。该催化剂回收简单,重复使用7次后,酯化率仍在96%以上。
N-butyl lactate was synthesized from lactic acid and n-butyl alcohol with rare earth solid superacid SO4^2-/ZrO2-Nd2O3 as catalyst,The effect of primary factors on esterification was investigated by orthogonal design experiment, The results showed that the optimum reaction conditions were：based on 0.1 mol lactic acid, molar ratio of n-butyl alcohol to lactic acid was 3.0 ： 1, the amount of catalyst was 0. 55 g, 15mL cyclohexane as water carrying agent, reaction time was 2.0 h at reflux temperature, the esterification yield was up to 98.7 under the optimum condition, rare composite solid superacid SO4^2-/ZrO2-Nd2O3 catalyst can be reused by simple phase-separation, the esterification yield was still up to 96% after the catalyst was reused 7 times.
出处
《中国调味品》
CAS
北大核心
2008年第8期48-51,共4页
China Condiment
基金
湖南省教育厅优秀青年科研基金项目(06B089)
