화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.18, No.1, 237-242, January, 2012
DOI10.1016/j.jiec.2011.11.023  Export Citation
[BMIM]Cl-nAlCl3 ionic liquid-catalyzed redistribution reaction between methyltrichlorosilane and low-boiling residue to dimethyldichlorosilane
Aili Wang, Yiqian Jiang, Weiguang Chen, Hengbo Yin†, Yanjun Liu, Yutang Shen, Tingshun Jiang, and Zhanao Wu
  • Faculty of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
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Methyltrichlorosilane and low-boiling residue from the synthesis of methylchlorosilanes via the direct reaction of silicon and methyl chloride were effectively converted to high-valued dimethyldichlorosilane catalyzed by 1-butyl-3-methylimidazolium chloroaluminate, [BMIM]Cl-nAlCl3, ionic liquid catalysts. The yield of dimethyldichlorosilane reached 69.1% when the redistribution reaction between methyltrichlorosilane and low-boiling residue was catalyzed by [BMIM]Cl-6AlCl3 at a reaction temperature of 150℃ for 300 min. The conversion of methyltrichlorosilane was 87.8%. And the conversions of tetramethylsilane, methylhydrodichlorosilane, and dimethylhydrochlorosilane present in low-boiling residue were ca. 100%, respectively. The ionic liquids could be recycled efficiently. This research provided an eco-friendly and economical route for the treatment of methyltrichlorosilane and low-boiling residue, which were the by-products in the direct synthesis of methylchlorosilanes. The possible reaction route was also discussed.
Keywords:Methyltrichlorosilane;Low-boiling residue;Lewis acid ionic liquids;Redistribution reaction
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