Environmentally benign process for benzylation of toluene to mono-benzylated toluene over highly active and stable hierarchical zeolite catalyst

被引：8

作者：

Nandiwale, Kakasaheb Y. ^{[1
]}

Thakur, Pratika ^{[1
]}

Bokade, Vijay V. ^{[1
]}

机构：

[1] CSIR Natl Chem Lab, Catalysis & Inorgan Chem Div, Pune 411008, Maharashtra, India

来源：

APPLIED PETROCHEMICAL RESEARCH | 2015年 / 5卷 / 02期

关键词：

Toluene; Benzyl chloride; Benzylation; Mono-benzylated toluene; Hier-HZ-5(78);

D O I：

10.1007/s13203-014-0096-4

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The liquid-phase benzylation of toluene with a benzylating agent like benzyl chloride (BC) is an important process for the production of mono-benzylated toluene (MBT), which is an industrially important compound used in pharmaceutical intermediates, fragrances, monomers for polycarbonate resins, heat-transfer fluids, aromatic solvents and fine chemicals. Selective synthesis of MBT by benzylation of toluene with BC over hierarchical micro-mesoporous-H-ZSM-5 (modified zeolite) catalyst was systematically studied for the first time. Hierarchical micro-mesoporous composites of H-ZSM-5 were obtained by treating parent H-ZSM-5 with different alkali (aq. NaOH) concentration. The synthesized catalysts were characterized by powder X-ray diffraction (XRD), BET surface area, TPAD, etc. The 100 % BC conversion with 100 % MBT selectivity was obtained over Hier-HZ-578 (Hierarchical H-ZSM-5) at lower molar ratio (toluene: BC) of 4:1 than 10:1 molar ratio reported, so far. The invented catalyst was also observed to be reusable for six catalytic cycles (one fresh and five recycles). The detailed optimization of process parameters such as molar ratio, catalyst loading and reaction time and temperature is also discussed.

引用

页码：113 / 119

页数：7

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