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http://dx.doi.org/10.9713/kcer.2018.56.2.291

Reaction Scheme on the Direct Synthesis of Methylchlorosilanes  

Kim, Jong Pal (Department of Chemical Engineering, Dongeui University)
Lee, Kwang Hyun (Department of Chemical Engineering, Dongeui University)
Publication Information
Korean Chemical Engineering Research / v.56, no.2, 2018 , pp. 291-296 More about this Journal
Abstract
Direct synthesis of methylchlorosilanes was developed by Rochow with addition of copper on the silicon surface as a catalyst and many research were followed. Most of research were focused on the increase of reaction activity through addition of promoters and concentrated on the increase of selectivity of DMDC. However, there are very few studies about the reaction mechanism. Although formation of DMDC was explained in literature, formation of other silanes were not mentioned at all. This reseach focused on the explanation about formation of all silanes obtained during direct reaction and TPD. Reaction paths were proposed by means of dissociative adsorption of methyl chloride and spillover of surface Cl and H. Surface silicon sites were considered as $=SlCl_2$ and $=Sl(CH_3)Cl$. The synthesis of all methylchlorosilanes were explained by the adsorption of methyl group on the silicon sites and by the surface diffusion of nearby Cl and H. The proposed reaction mechanism explains the formation of all silanes during the reaction and also during the TPD process.
Keywords
Rochow reaction; Direct synthesis; Silanes; Reaction scheme;
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