| TiO2/SiO2催化酯交换合成草酸二苯酯 |
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| 引用本文： | 边 丽,王胜平,马新宾.TiO2/SiO2催化酯交换合成草酸二苯酯[J].河北工业科技,2009,26(4):211-214,227. |
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| 作者姓名： | 边 丽 王胜平 马新宾 |
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| 作者单位： | 1. 天津大学化工学院绿色合成与转化教育部重点实验室,天津,300072;河北工程大学理学院,河北邯郸,056038
2. 天津大学化工学院绿色合成与转化教育部重点实验室,天津,300072 |
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| 摘 要： | 使用负载型TiO2/SiO2催化剂催化了草酸二乙酯和苯酚酯交换反应合成草酸二苯酯。采用NH3-TPD探讨了催化剂表面酸性强弱对草酸二乙酯和苯酚酯交换反应的影响。结果表明,催化性能与TiO2/SiO2催化剂上存在的酸中心强度密切相关,弱酸中心的存在导致了催化剂良好的催化活性。同时考察了不同反应温度、回流温度、原料物质的量比和反应时间等对反应性能的影响。当TiO2负载量为10%(质量分数)时,TiO2/SiO2的催化性能最佳,草酸二乙酯的转化率为49.5%,草酸二苯酯的收率为11.8%,乙基苯基草酸酯的收率为37.7%,目的产物草酸二苯酯和乙基苯基草酸酯的总选择性为100%。
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| 关 键 词： | TiO2/SiO2 酯交换 草酸二苯酯 草酸二乙酯 乙基苯基草酸酯 |
| 收稿时间： | 2009/3/6 0:00:00 |
| 修稿时间： | 2009/4/13 0:00:00 |
Synthesis of diphenyl oxalate by transesterification over TiO2/SiO2catalysts |
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| BIAN Li,WANG Sheng-ping and MA Xin-bin.Synthesis of diphenyl oxalate by transesterification over TiO2/SiO2catalysts[J].Hebei Journal of Industrial Science & Technology,2009,26(4):211-214,227. |
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| Authors: | BIAN Li WANG Sheng-ping and MA Xin-bin |
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| Institution: | BIAN Li1,2,WANG Sheng-ping1,MA Xin-bin1(1.Key Laboratory for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China,2.College of Sciences,Hebei University of Engineering,Handan Hebei 056038,China) |
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| Abstract: | The transesterification of diethyl oxalate(DEO) with phenol to produce ethyl phenyl oxalate(EPO) and diphenyl oxalate(DPO) was carried out over TiO2/SiO2 catalysts.The catalysts were characterized by temperature programmed desorption of ammonia(NH3-TPD),and the relationship between the catalytic properties of TiO2/SiO2 and the weak acid sites on the surface of TiO2/SiO2 was studied in detail.NH3-TPD illuminated that the weak acid sites were responsible for transesterification between DEO and phenol.The effe... |
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| Keywords: | TiO2/SiO2 |
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