催化学报 ›› 2012, Vol. 33 ›› Issue (11): 1802-1808.DOI: 10.1016/S1872-2067(11)60453-1

• 研究论文 • 上一篇    下一篇

Heterogenization of Indium for the Friedel-Craft Benzoylation of Toluene

Farook ADAM*, Kei Lin SEK   

  1. School of Chemical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia
  • 收稿日期:2012-06-30 修回日期:2012-08-28 出版日期:2012-11-16 发布日期:2012-11-16

Heterogenization of Indium for the Friedel-Craft Benzoylation of Toluene

Farook ADAM*, Kei Lin SEK   

  1. School of Chemical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia
  • Received:2012-06-30 Revised:2012-08-28 Online:2012-11-16 Published:2012-11-16

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-methylbenzonphenone) were obtained.

关键词: rice husk, sol-gel, indium, Friedel-Craft benzoylation, Toluene

Abstract: 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.

Key words: rice husk, sol-gel, indium, Friedel-Craft benzoylation, Toluene