Heterogenization of Indium for the Friedel-Craft Benzoylation of Toluene

• 作者: Farook ADAM*, Kei Lin SEK
• 来源期刊: 催化学报
• 学科: 化学
• 关键词: rice husk sol-gel indium Friedel-Craft benzoylation Toluene
• 年，卷（期）: 2012,（11）
• 页码范围: 1802-1808
• 分类号: O643
• 语种: 中文
• DOI: 10.1016/S1872-2067(11)60453-1

摘要

Indium incorporated silica samples with different indium contents were synthesized using a template free sol-gel method. The silica used was extracted from rice husk (RH) and the resulting catalyst was labeled as RH-xIn (x=5%,10%,15%, and 20%). From the N2 adsorption analysis the presence of type IV isotherm in RH-blank and RH-xIn indicated the mesoporous nature of the catalysts. In the XRD pattern, a broad band at ca.2θ=25° was observed for all the catalysts which showed them to be amorphous. TEM micrographs revealed that the material is composed of nanoparticles. Friedel-Craft benzoylation of toluene was carried out using the RH-xIn catalyst. The optimum conditions for the benzoylation of toluene were determined and at 373 K,100%conversion and 89%selectivity for the para-product (i.e.4-methylbenzophenone) were obtained.