| 二氧化硅负载磷钨酸催化合成2-乙酰噻吩 |
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| 引用本文： | 程丽华,黄敏,农兰平,赵锦辉.二氧化硅负载磷钨酸催化合成2-乙酰噻吩[J].精细石油化工,2009,26(2). |
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| 作者姓名： | 程丽华 黄敏 农兰平 赵锦辉 |
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| 作者单位： | 茂名学院化工与环境工程学院,广东,茂名,525000 |
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| 基金项目： | 广东省茂名市科技计划项目 |
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| 摘 要： | 考察了几种杂多酸催化合成2-乙酰噻吩的催化活性,筛选出催化活性较高的磷钨酸作为前驱体,利用不同载体、采用不同的负载方法制备负载型催化剂,并考察其催化合成2-乙酰噻吩的催化活性。结果表明,采用浸泡法,SiO_2负载磷钨酸的催化活性最高。在H_3PW_(12)O_(40)/SiO_2催化剂用量为1%(以总物料量计)、n (噻吩):n(乙酐)=2:1,反应温度80℃,反应时间120 min条件下,2-乙酰噻吩的产率达85.92%,选择性达99.9%,催化剂可重复使用。
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| 关 键 词： | 磷钨酸 杂多酸 载体 浸泡法 二氧化硅 2-乙酰噻吩 |
CATALYTIC SYNTHESIS OF 2-ACETYLTHIOPHENE OVER SiO2-SUPPORTED HETEROPOLYACID |
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| Cheng Lihua,Huang Min,Nong Lanping,Zhao Jinhui.CATALYTIC SYNTHESIS OF 2-ACETYLTHIOPHENE OVER SiO2-SUPPORTED HETEROPOLYACID[J].Speciality Petrochemicals,2009,26(2). |
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| Authors: | Cheng Lihua Huang Min Nong Lanping Zhao Jinhui |
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| Affiliation: | Cheng Lihua,Huang Min,Nong Lanping and Zhao Jinhui (College of Chemical and Environmental Engineering,Maoming University,Maoming 525000,Guangdong,China) |
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| Abstract: | The catalytic activity of a few types of heteropolyacid for the synthesis of 2-acetylthiophene was investigated.H_3PW_(12)O_(40) was identified as the optimum heteropolyacid.The effects of supports and loading methods were studied.The results showed that H_3PW_(12)O_(40) impregnated SiO_2 gives the highest yield of 2-acetylthiophene.Under the optimum conditions,i.e.,30%H_3PW_(12)O_(40)/SiO_2,1% (w) catalyst based on the total reaction mixture,molar ratio of thiophene to acetic anhydride 2:1, reaction temper... |
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| Keywords: | phosphotungstic acid polyoxometalate supports dipping silicon dioxide 2-acetylthiophene |
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