Benzylation of benzene with benzyl alcohol on zeolite catalysts

被引：42

作者：

Candu, N. ^{[1
]}

Florea, M. ^{[1
]}

Coman, S. M. ^{[1
]}

Parvulescu, V. I. ^{[1
]}

机构：

[1] Univ Bucharest, Dept Chem Technol & Catalysis, Fac Chem, Bucharest 030016, Romania

来源：

APPLIED CATALYSIS A-GENERAL | 2011年 / 393卷 / 1-2期

关键词：

Benzylation; Diphenylmethane; Benzyl alcohol; Zeolites; TEMPERATURE-PROGRAMMED DESORPTION; CONTAINING MESOPOROUS SILICAS; FRIEDEL-CRAFTS ALKYLATION; LIQUID-PHASE BENZYLATION; FE-MODIFIED ZSM-5; ACIDIC PROPERTIES; PROBE MOLECULES; BETA ZEOLITES; CHLORIDE; TOLUENE;

D O I：

10.1016/j.apcata.2010.11.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The catalytic liquid phase benzylation of benzene to diphenylmethane (DPM) with benzyl alcohol (BnOH) was investigated over various zeolite catalysts (HSZ 600 mordenite. CBV 20A mordenite, H-beta zeolites with Si/Al of 10.8 and 35.8, respectively) at 353-423 K and under atmospheric pressure, using three reaction methodologies: (A) by adding all benzyl alcohol at the beginning of the reaction, (B) by dropwise addition of benzyl alcohol (1-2 drops/min for 4 h) and (C) under continuous flow conditions. Nafion-embedded silica and AlCl3/MCM-41 were also tested for comparison. The conversion and product distribution largely depended on the experimental conditions and the zeolite nature. Under optimal conditions using the Beta zeolite (Si/Al molar ratio of 10.8) and the (C) methodology, selectivity to DPM of 88.9% for a conversion of BnOH of 99.2% were achieved. Recycling tests showed that the catalyst preserved its activity and selectivity to DPM after several cycles. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：206 / 214

页数：9

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