Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Slurry Phase Reaction of Elemental Silicon with Methanol in the Presence of Copper: Direct Synthesis of Trimethoxysilane

  • Han, Joon-Soo (Organosilicon Chemistry Laboratory, Korea Institute of Science and Technology) ;
  • Cho, Joo-Hyun (Organosilicon Chemistry Laboratory, Korea Institute of Science and Technology,Organosilicon Chemistry Laboratory, Korea Institute of Science and Technology) ;
  • Lee, Myong-Euy (Department of Chemistry, Graduate School, Yonsei University) ;
  • Yoo, Bok-Ryul (Department of Chemistry, Graduate School, Yonsei University)
  • Published : 2009.03.20
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Abstract

Slurry phase reaction of elemental silicon with methanol has been studied in the presence of copper using a small amount of cuprous chloride as an activator in DBT (dibenzyltoluene) at various temperatures from 200 ${^{\circ}C}$ to 320 ${^{\circ}C}$. Trimethoxysilane (1a) with a Si-H unit was obtained as the major product and tetramethoxysilane (1b) as the minor product. The reaction worked well using a 0.5 wt % CuCl as an activator. The optimum temperature for this direct synthesis of 1a was 240 ${^{\circ}C}$. Methoxysilanes were obtained in 95% yield with 81% selectivity to 1a from 85% conversion of elemental silicon.

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