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稀土复合固体超强酸催化合成食用香料乳酸正丁酯

Catalytic synthesis of flavor n-butyl lactate by rare earth composite solid superacid

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【Author】 ZHANG Aihua1, DENG Bin2*, CHEN Liuping3, YU Qiu4 (1. College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China; 2. Department of Chemistry and Life Science, Xiangnan Institute, Chenzhou 423000, China; 3. College of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 520275, China; 4. Center of Basic Chemistry Experimentation, South China University of Technology, Guangzhou 510640, China)

【机构】吉首大学化学化工学院；湘南学院化学与生命科学系；中山大学化学与化学工程学院；华南理工大学基础化学实验中心湖南吉首416000；湖南郴州423000；广东广州520275；广东广州510640；

【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。通过正交试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次后酯化率仍超过96%。更多还原

【Abstract】 n-butyl lactate was synthesized from lactic acid and n-butanol with rare earth solid superacid SO42-/ZrO2-Nd2O3 as catalyst. The effect of primary factors on esterification was investigated by orthogonal experiment. The optimum reaction conditions were determined: based on 0.1 mol lactic acid, molar ratio of n-butanol to lactic acid 3.0:1, the amount of catalyst 0.55 g, 15 ml cyclohexane as water carrying agent, reaction time 2.0 h at reflux temperature. The esterification rate reached 98.7% under the optimum condition. Rare composite solid superacid SO42-/ZrO2-Nd2O3 catalyst can be reused by simple phase-separation; the esterification rate reached 96% after the catalyst was reused 7 times.更多还原

【关键词】稀土复合固体超强酸；乳酸正丁酯；催化；合成；
【Key words】 rare earth composite solid superacid； n-butyl lactate； catalysis； synthesis；

【基金】湖南省教育厅优秀青年科研基金项目(06B089)

【文献出处】中国酿造 ,China Brewing , 编辑部邮箱 ,2008年07期

【分类号】TQ655
【被引频次】7
【下载频次】126

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