| A Durable Catalyst for Vapor Phase Nitration of Benzene with Nitric Acid |
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| 作者姓名： | Peng ZHOU Xin Ping WANG Tian Xi CAI* State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian |
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| 作者单位： | Peng ZHOU，Xin Ping WANG，Tian Xi CAI* State Key Laboratory of Fine Chemicals，School of Chemical Engineering，Dalian University of Technology，Dalian 116012 |
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| 摘 要： | Nitrobenzene is one of the most important chemical intermediates, for preparing drugs, pesticides and explosive etc. For more than a century, it has been commercially manufactured by reacting benzene with mixed acid in liquid phase under vigorous agitation. Despite the high efficiency, the mixed-acid process has some drawbacks, among which the huge amount of spent acid and wastewater are by far the most crucial, and this makes an alternative solution desirable. Nitration of benzene over sol…
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A Durable Catalyst for Vapor Phase Nitration of Benzene with Nitric Acid |
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| Peng ZHOU,Xin Ping WANG,Tian Xi CAI* State Key Laboratory of Fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian .A Durable Catalyst for Vapor Phase Nitration of Benzene with Nitric Acid[J].Chinese Chemical Letters,2002,13(10). |
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| Authors: | Peng ZHOU Xin Ping WANG Tian Xi CAI |
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| Institution: | State Key Laboratory of Fine Chemicals, School of Chemical Engineering,Dalian University of Technology, Dalian 116012 State Key Laboratory of Fine Chemicals, School of Chemical Engineering,Dalian University of Technology, Dalian 116012 State Key Laboratory of Fine Chemicals, School of Chemical Engineering,Dalian University of Technology, Dalian 116012 |
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| Abstract: | Experimental results in this work demonstrate that PW12-H2SO4/SiO2 catalyst is a good and durable catalyst for vapor phase nitration of benzene to nitrobenzene (NB) using 65% nitric acid at normal pressure. It retains the advantages of using H2SO4 as catalyst and the addition of phosphotungstic acid holds back the effusion of sulfuric acid. This new catalyst keeps high activity (the conversion of HNO3 is more than 92%), high selectivity of NB (more than 97%) and high space time yield (STY 1.5 kg NB/kg cat.h) even after 150 h on stream, under condition of 423 K, SV=3200 ml/g h. |
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| Keywords: | Nitration benzene solid acid nitric acid nitrobenzene |
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