Catalytic Chlorination of Methylphenyldichlorosilane to Chlorinated Methylphenyldichlorosilanes over Ionic Liquids, [BMIM]Cl鈥? [Et3NH]Cl鈥? and [BPy]Cl鈥?i>nMClx (M = Al

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• 作者：Yujun Fu ; Hengbo Yin ; Aili Wang ; Yonghai Feng ; Lingqin Shen
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：July 8, 2015
• 年：2015
• 卷：54
• 期：26
• 页码：6619-6626
• 全文大小：503K
• ISSN：1520-5045

文摘

Ionic liquids [BMIM]Cl鈥?i>nMCl_x, [Et₃NH]Cl鈥?i>nMCl_x, and [BPy]Cl鈥?i>nMCl_x (M = Al, Fe, Zn; n = 1, 2, 2.5) were used for the catalytic chlorination of methylphenyldichlorosilane with gaseous chlorine to chlorinated methylphenyldichlorosilanes. The catalytic activities of the ionic liquids were in an order of ionic liquids containing Al_nCl^{鈥?/sup>_3n+1 鈮?ionic liquids containing Fe_nCl鈥?/sup>_3n+1 > ionic liquids containing Zn_nCl鈥?/sup>_2n+1, being inconsistent with the order of their Lewis acidities. Lewis acid sites present in the ionic liquids catalyzed the chlorination reaction, while Br枚nsted acid sites caused the cleavage of the phenyl-silicon bond. Methylchlorophenyldichlorosilane was mainly formed by the chlorination of methylphenyldichlorosilane over the ionic liquids.}