Citation: Peng ZHOU, Xin Ping WANG, Tian Xi CAI. A Durable Catalyst for Vapor Phase Nitration of Benzene with Nitric Acid[J]. Chinese Chemical Letters, ;2002, 13(10): 1013-1016. shu

A Durable Catalyst for Vapor Phase Nitration of Benzene with Nitric Acid

State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012

Received Date: 4 January 2002

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.
- Nitration,
- benzene,
- solid acid,
- nitric acid,
- nitrobenzene
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