HZSM-5、P-HZSM-5、H-Theta-1、H-Y和h -丝光沸石分子筛催化烷基芳醚的热裂解

Q4 Chemical Engineering

分子催化 Pub Date : 1994-08-12 DOI:10.1016/0304-5102(94)00057-3

Raphael C. Mordi , Roy Fields, John Dwyer

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引用次数: 3

摘要

在沸石(HZSM-5, P-HZSM-5, H-Theta-1, H-Y和h -丝光沸石)上，考察了流动和间歇条件下苯甲醚和苯乙酚的热裂解。产物混合物的主要成分是苯酚、重排产物(甲酚和乙基苯酚)和烷基化底物(甲基磺酸和乙基苯酚)。所有分子筛对甲酚和乙基苯酚均表现出邻位选择性，而中孔分子筛(HZSM-5、P-HZSM-5和H-Theta-1)对甲基苯酚和乙基苯酚表现出对位选择性，而大孔分子筛(HY和HM)表现出邻位选择性。观察到的选择性被认为是由于这些沸石的动力学效应(扩散)和过渡态选择性。

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Thermolysis of alkyl aryl ethers catalysed by HZSM-5, P-HZSM-5, H-Theta-1, H-Y and H-Mordenite zeolites

The thermolysis of anisole and phenetole under flow and batch conditions was examined over zeolites (HZSM-5, P-HZSM-5, H-Theta-1, H-Y and H-mordenite). The major components of the product mixture were phenol, the rearranged products (cresols and ethylphenols) and alkylated substrates (methylanisoles and ethylphenetoles). All the zeolites showed ortho selectivity in cresols and ethylphenols while the medium-pore zeolites (HZSM-5, P-HZSM-5 and H-Theta-1) showed para selectivity in methylanisoles and ethylphenetoles in contrast to the large-pore zeolites (HY and HM) which showed ortho selectivity. The observed selectivities are thought to be due to both kinetic effects (diffusion) and transition state selectivity over these zeolites.

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来源期刊

分子催化 Chemical Engineering-Catalysis

CiteScore

1.50

自引率

0.00%

发文量

2959

期刊介绍： Journal of Molecular Catalysis (China) is a bimonthly journal, founded in 1987. It is a bimonthly journal, founded in 1987, sponsored by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, under the supervision of Chinese Academy of Sciences, and published by Science Publishing House, which is a scholarly journal openly circulated both at home and abroad. The journal mainly reports the latest progress and research results on molecular catalysis. It contains academic papers, research briefs, research reports and progress reviews. The content focuses on coordination catalysis, enzyme catalysis, light-ribbed catalysis, stereochemistry in catalysis, catalytic reaction mechanism and kinetics, the study of catalyst surface states and the application of quantum chemistry in catalysis. We also provide contributions on the activation, deactivation and regeneration of homogeneous catalysts, solidified homogeneous catalysts and solidified enzyme catalysts in industrial catalytic processes, as well as on the optimisation and characterisation of catalysts for new catalytic processes. The main target readers are scientists and postgraduates working in catalysis in research institutes, industrial and mining enterprises, as well as teachers and students of chemistry and chemical engineering departments in colleges and universities. Contributions from related professionals are welcome.