Inorganic Chemicals Industry ›› 2021, Vol. 53 ›› Issue (3): 30-33.doi: 10.11962/1006-4990.2020-0217

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress on separation process of methyl dichlorosilane from trichlorsilane

Yang Dian(),Wang Fang,Wan Ye,Sun Qiang,Zhang Zheng,Shi Qinghe   

  1. National Engineering Laboratory for the Preparation of Polysilicon Materials,China Silicon Cprporation Ltd.,Luoyang 471000,China
  • Received:2020-09-22 Online:2021-03-10 Published:2021-03-11

Abstract:

The content of methyl dichlorosilane in trichlorosilane would seriously affect the quality of polysilicon,therefore,the control of methyl dichlorosilane has been significant on the quality of polysilicon.The effectual removal process of methyl dichlorosilane impurity including conventional distillation,adsorption,reaction distillation and extractive distillation method was emphatically summarized.Advantages and disadvantages of these above methods were compared and analyzed.Adsorption and reactive distillation process were effective separation technology of methyl dichlorosilane.Furthermore,extractive distilla-tion has been an important research field in separation of methyl dichlorosilane.Finally,the development trends of those separation process was prospected.

Key words: trichlorosilane, methyl dichlorosilane, adsorption, reactive distillation, extractive distillation

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