| 王晓宇,高鹏飞,高春光,赵永祥.SiO2气凝胶负载无水四氯化锡催化顺酐与正丁醇酯化反应的研究[J].分子催化,2012,(1):39-45 |
| SiO2气凝胶负载无水四氯化锡催化顺酐与正丁醇酯化反应的研究 |
| Esterification of Maleic Anhydride with Butanol over Tin Tetrachloride Supported on Silica Aerogels Catalyst |
| 投稿时间：2011-12-20 修订日期：2012-02-08 |
| DOI： |
| 中文关键词: 酯化反应 顺酐 正丁醇 SiO2气凝胶 无水四氯化锡 |
| 英文关键词:Esterification Maleic anhydride Butanol Silica aerogels Tin tetrachloride |
| 基金项目:国家自然科学基金；山西省科技攻关计划 |
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| 中文摘要: |
| 首次制备了气凝胶SiO2负载无水四氯化锡催化剂（Sn/Si，Sn负载量约为6wt%，Cl为4wt%）并应用于顺酐与正丁醇的酯化反应。结果表明，酯化产物主要为马来酸二丁酯（DBM）与富马酸二丁酯（DBF），其优化条件为：载体SiO2气凝胶焙烧温度500℃，物料摩尔比 顺酐：正丁醇：催化剂 = 1：2：0.0028，反应时间6h。并且通过XRD，FTIR，DRUV-vis，N2 物理吸附以及元素分析技术对所合成催化剂进行表征。结果表明：无水四氯化锡成功负载于SiO2气凝胶表面，在催化酯化反应当中实现了86.10%的顺酐转化率，此结果接近于国内外所报道的均相体系成果，同时在催化回收利用六次后，其活性仍得到很好的保持。 |
| 英文摘要: |
| Dibutyl maleate (DBM) and dibutyl fumarate (DBF) are important intermediates extensively used in industrial application. The current paper reports a study on the efficacy of tin tetrachloride supported on silica aerogels catalyst (Sn/Si) in the esterification of maleic anhydride (MA) with butanol (BO) at reflux in which DBM and DBF are synthesized directly. The catalyst was characterized by X-ray powder diffraction (XRD), Infrared (FTIR) spectra, UV-vis diffuse reflectance spectra (DRUV-vis), N2 sorption and element analysis. The optimal reaction conditions were confirmed as follows: calcination temperature of silica aerogels was 500 ?C, reaction time was 6 h, mol ratio of reactants was 1 : 2 : 0.0028 (MA : BO : Sn/Si). The conversion of MA was up to 86.10 % almost tends to the homogeneous catalyst system. And the Sn/Si catalyst kept a reasonable activity after 6 times reused cycles. |
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