三氯氢硅
四氯化硅
化学
催化作用
试剂
碳化硅
危险废物
氯化氢
硅
有机化学
废物管理
工程类
作者
Alexander G. Sturm,Uhut S Karaca,Myron Heinz,Thorsten Felder,Kenrick M. Lewis,Norbert Auner,Max C. Holthausen
出处
期刊:Chemsuschem
[Wiley]
日期:2023-01-26
卷期号:16 (5)
被引量:1
标识
DOI:10.1002/cssc.202201953
摘要
Trichlorosilane is the key intermediate for the large-scale production of polycrystalline silicon in the Siemens and Union Carbide processes. Both processes, however, are highly inefficient, and over two thirds of the trichlorosilane employed is converted to unwanted silicon tetrachloride accumulating in millions of tons per year on a global scale. In this combined experimental and theoretical study we report an energetically and environmentally benign synthetic protocol for the highly selective conversion of SiCl4 to HSiCl3 using organohydridosilanes as recyclable hydrogen transfer reagents in combination with onium chlorides as efficient catalysts. We put the same protocol to further use demonstrating the quantitative conversion of higher oligosilane residues, which form as another unwanted and potentially hazardous byproduct of Siemens processes, to HSiCl3 in a low-temperature recycling step.
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