发明授权
- 专利标题： Preparation of sulfur-containing organosilicon compounds using a buffered phase transfer catalysis process
- 专利标题（中）： 使用缓冲相转移催化方法制备含硫有机硅化合物
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申请号： US09895719申请日： 2001-06-29
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公开(公告)号： US06534668B2公开(公告)日： 2003-03-18
- 发明人: Michael Wolfgang Backer , Howard Marvin Bank , John Michael Gohndrone , William Charles Maki , Charles Edmund Skinner , Anil Kumar Tomar , Hongjun Yue
- 申请人： Michael Wolfgang Backer , Howard Marvin Bank , John Michael Gohndrone , William Charles Maki , Charles Edmund Skinner , Anil Kumar Tomar , Hongjun Yue
- 主分类号： C07F708
- IPC分类号： C07F708
摘要：
A process for the production of sulfur containing organosilicon compounds of the formula: (RO)3−mRmSi—Alk—Sn—Alk—SiRm(OR)3−m where R is independently a monovalent hydrocarbon of 1 to 12 carbon atoms; Alk is a divalent hydrocarbon of 1 to 18 carbon atoms; m is an integer of 0 to 2, n is a number from 1 to 8; based on phase transfer catalysis techniques is disclosed. The process comprises reacting: (A) a sulfide compound having the formula M2Sn or MHS, where H is hydrogen, M is ammonium or an alkali metal, n is as defined above, with (B) a silane compound of the formula; (RO)3−mRmSi—Alk—X where X is Cl, Br or I, and m is the same as above, and optionally, (C) sulfur in the presence of a phase transfer catalyst and an aqueous phase containing a buffer. The improvement of the present invention is characterized by adding a buffer to the aqueous phase, which minimizes or prevents gelling of the sulfur containing organosilicon compounds. The present invention also teaches a process for the production of sulfur containing organosilicon compounds by controlling the pH of the aqueous phase.