| SBA-15固载酸性离子液体催化酯化反应性能 |
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| 引用本文： | 胡晶晶,赵地顺,胡甜甜,李静静,翟建华.SBA-15固载酸性离子液体催化酯化反应性能[J].化工学报,2016,67(5):1907-1914. |
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| 作者姓名： | 胡晶晶 赵地顺 胡甜甜 李静静 翟建华 |
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| 作者单位： | 河北科技大学化学与制药工程学院, 河北 石家庄 050018 |
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| 基金项目： | 国家自然科学基金项目(20576026)。 |
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| 摘 要： | 为了减少离子液体用量及解决催化剂分离问题,采用键合法制备了以SBA-15为载体的固载化离子液体催化剂C3SO3HCP]HSO4/SBA-15,通过FT-IR、TG、XRD、BET和TEM分析了催化剂的结构和稳定性。并将其应用于催化丁二酸酐和乙醇的酯化反应。结果表明:C3SO3HCP]HSO4被成功固定在SBA-15上,且具有较高的热稳定性和催化活性,克服了非均相催化剂活性不高与均相催化剂难以分离的不足。在催化剂用量为反应物总质量的5%、n(C4H4O3):n(C2H5OH)=1:3,反应温度80℃;反应时间4 h、带水剂用量为反应物总质量的30%的条件下,酯收率达93.7%,且该催化剂循环使用8次后,仍具有较高的催化活性。此外,还考察了以C3SO3HCP]HSO4/SBA-15为催化剂催化合成系列酯也获得了较高的酯收率,且易于与产物酯分离。
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| 关 键 词： | SBA-15 固定化 离子液体 酯化反应 催化剂 |
| 收稿时间： | 2015-10-14 |
| 修稿时间： | 2015-11-16 |
Synthesis and performance of heterogeneous catalyst of immobilized acidic ionic liquid on SBA-15 for esterification |
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| HU Jingjing,ZHAO Dishun,HU Tiantian,LI Jingjing,ZHAI Jianhua.Synthesis and performance of heterogeneous catalyst of immobilized acidic ionic liquid on SBA-15 for esterification[J].Journal of Chemical Industry and Engineering(China),2016,67(5):1907-1914. |
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| Authors: | HU Jingjing ZHAO Dishun HU Tiantian LI Jingjing ZHAI Jianhua |
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| Affiliation: | College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China |
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| Abstract: | To decrease the usage of ionic liquid and facilitate the separation of catalyst from the product, a novel Brønsted acidic ionic liquid catalyst of 1-(3-sulfopropyl)caprolactam hydrogen sulfate (C3SO3HCP]HSO4) supported on SBA-15 was prepared through covalent bond grafting method. In order to achieve structural information and stability of catalysts, the samples were characterized by FT-IR, TG, XRD, BET and TEM techniques. The catalytic activities of the immobilized ionic liquid for the esterification of succinic anhydride with ethanol were investigated. It showed that C3SO3HCP]HSO4 has been successfully immobilized onto the SBA-15 with relatively good thermal stability and catalytic activity, which overcomes the drawbacks of low activity of heterogeneous catalyst, and difficult separation of homogeneous catalyst from the reaction system. Under the optimized conditions of 5%(mass) of catalyst dosage, n(C4H4O3):n(C2H5OH)=1:3, 80℃ of reaction temperature, 4 h of reaction time, and 30%(mass) of water carrying agent dosage, the yield of diethyl succinate was up to 93.7%. The SBA-15 immobilized ionic liquids remained satisfactory catalytic activity for the synthesis of diethyl succinate after 8 cycles. Moreover, the IL/SBA-15 exhibited relatively high yield of diethyl succinate for a series of esterification and the product could be separated easily from the reaction system. |
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| Keywords: | SBA-15 immobilization ionic liquid esterification catalyst |
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