Synthesis of Dimethyldichlorosilane by Catalytic Disproportionation of Methyltrichlorosilane Over A H2SO4 Activated Chinese Bentonite

Disproportionation of methyltrichlorosilane (MTS) to produce dimethyldichlorosilane (DMCS) was firstly carried out over a bentonite from Zhejiang province (China) after H 2 SO 4 activation. The results demonstrated that the bentonite activated with 30 wt% H 2 SO 4 solution exhibited an excellent act...

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Bibliographic Details
Published in:Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 2011-10, Vol.186 (10), p.2135-2144
Main Authors: Ao, Zhiyong, Zhang, Ning, Jian, Lijuan, Fu, Qiong, Zhang, Fang, Chen, Chao
Format: Article
Language:English
Subjects:
acid activation
bentonite
dimethyldichlorosilane
Disproportionation
methyltrichlorosilane
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Summary:Disproportionation of methyltrichlorosilane (MTS) to produce dimethyldichlorosilane (DMCS) was firstly carried out over a bentonite from Zhejiang province (China) after H 2 SO 4 activation. The results demonstrated that the bentonite activated with 30 wt% H 2 SO 4 solution exhibited an excellent activity with 92% conversion of MTS and 41% yield of DMCS at 673 K under atmospheric pressure. The catalysts were characterized by inductively coupled plasma atomic emission spectroscopy (ICP-AES), X-ray powder diffraction (XRD) and N 2 absorption-desorption. The acidic sites of these bentonites were studied by in situ FTIR spectra of pyridine adsorption. It revealed that the coexistence of Lewis (L) and Brønsted (B) acidic sites facilitated the formation of DMCS and reaction temperature played important roles in the disproportionation reaction. GRAPHICAL ABSTRACT
ISSN:1042-6507
1563-5325
DOI:10.1080/10426507.2011.590167