| H3PW12O40／SiO2催化合成苹果酯-B |
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| 引用本文： | 杨水金,徐玉林,喻苏,蔡千喜.H3PW12O40／SiO2催化合成苹果酯-B[J].化学工业与工程技术,2013(6):11-14. |
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| 作者姓名： | 杨水金 徐玉林 喻苏 蔡千喜 |
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| 作者单位： | [1]湖北师范学院化学与环境工程学院,湖北黄石435002 [2]湖北黄石二中,湖北黄石435000 |
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| 基金项目： | 湖北省自然科学基金（2005ABA053）资助项目. |
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| 摘 要： | 以H3PW12O40／SiO2为催化剂，对以乙酰乙酸乙酯和1，2-丙二醇为原料合成苹果酯-B的反应条件进行了研究。考察了原料物质的量比、催化剂用量（质量）、带水剂用量（质量）、反应时间对产品收率的影响。试验结果表明H3PW12O40／SiO2是合成苹果酯-B的良好催化剂，最佳反应条件为：n（乙酰乙酸乙酯）：n（1，2-丙二醇）=1：1．5，催化剂质量为反应物总质量的0．8％，带水剂环己烷6mL，反应时间90min。上述条件下，苹果酯-B的收率可达68．9％。
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| 关 键 词： | 苹果酯-B磷钨酸 负载 杂多酸 催化 缩酮反应 |
Catalytic synthesis of fructone-B with H3PW12O40/SiO2 |
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| YANG Shuijin,XU Yulin,YU Su,CAI Qianxi.Catalytic synthesis of fructone-B with H3PW12O40/SiO2[J].Journal of Chemical Industry & Engineering,2013(6):11-14. |
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| Authors: | YANG Shuijin XU Yulin YU Su CAI Qianxi |
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| Affiliation: | 1 College of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435002, China; 2. No. 2 Middle School of Huangshi, Huangshi 435000, China) |
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| Abstract: | The reaction conditions of synthesizing fructone-B from ethyl acetoacetate with 1,2-propanediol using H3 PW12 O40/SiO2 as catalysts are studied. The influence factors such as the molar ratio of raw materials, the dosage of catalyst, the volume of water-car- rying agent and the reaction time on product yield are investigated. The results show that the H3PWnO40/SiO2 is an excellent catalyst for synthesizing fructone-B, and the optimum conditions are obtained as follow： the molar ratio of ethyl acetoacetate to 1,2-propanediol is 1 ： 1.5, the mass faction of catalyst is 0. 8%, the volume of cyclohexane as the water-carrying agent is 6 mL and the reaction time is 90 min. Under the mentioned conditions, the product yield can reach over 68.9%. |
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| Keywords: | Fructone-B Pbosphotungstic acid Support Heteropoly acid Catalysis Ketalation |
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