Comparison of mesoporous Al-MCM-41 molecular sieves in the production of p-cymene for isopropylation of toluene

被引：91

作者：

Selvaraj, M ^{[1
]}

Pandurangan, A ^{[1
]}

Seshadri, KS ^{[1
]}

Sinha, PK ^{[1
]}

Krishnasamy, V ^{[1
]}

Lal, KB ^{[1
]}

机构：

[1] CWMF, BARC Facilit, Kalpakkam 603102, Tamil Nadu, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2002年 / 186卷 / 1-2期

关键词：

mesoporous molecular sieves; Al-MCM-41; synthesis; characterization; isopropylation; p-cymene;

D O I：

10.1016/S1381-1169(02)00134-6

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：

Mesoporous aluminosilicate Al-MCM-41 with Si/Al = 93 and 104 were synthesized using cetyltrimethylammonium bromide as the structuring agent and the materials were characterized using several techniques. The mesoporous structure was confirmed by X-ray diffraction (XRD) technique. The surface area, pore size and wall thickness was calculated by BET equation and BJH method using nitrogen sorption technique. Fourier transform-infrared (FF-IR) spectroscopy was used in order to obtain information on incorporated aluminum atoms in the mesoporous structure of Al-MCM-41. Thermogravimetric-differential thermal analyzer (TG-DTA) was used to determine the thermal stability of the materials. The effect of reaction temperature, WHSV and isopropanol: toluene ratios on the selectivity of p-cymene were studied. The Al-MCM-41 (93) catalyst exhibited excellent selectivity in the production of p-cymene by the isopropylation of toluene using isopropanol as the propylating agent. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：173 / 186

页数：14

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