公开(公告)号：US4213937A

公开(公告)日：1980-07-22

申请号：US726018

申请日：1976-09-22

申请人： Francois A. Padovani ,  Michael B. Miller ,  James A. Moore ,  James H. Fowler ,  Malcom N. June ,  James D. Matthews ,  T. R. Morton ,  Norbert A. Stotko ,  Lewis B. Palmer

发明人： Francois A. Padovani ,  Michael B. Miller ,  James A. Moore ,  James H. Fowler ,  Malcom N. June ,  James D. Matthews ,  T. R. Morton ,  Norbert A. Stotko ,  Lewis B. Palmer

IPC分类号： B01J8/18 ,  C01B33/02 ,  C01B33/00

CPC分类号： B01J8/1836 ,  C01B33/02 ,  B01J2208/00132 ,  B01J2208/00194 ,  B01J2208/00274 ,  B01J2208/00371 ,  B01J2208/00407 ,  B01J2208/00415 ,  B01J2208/0053

摘要： A balanced, closed cycle silicon refinery system has been developed for producing electronic grade silicon from industrial grade silicon. Impurities comprising approximately 1% of the industrial grade silicon are removed in the refinery system to produce the purified silicon, while only a relatively small percentage of make-up chemicals are added to the system. In the refinery, hydrogen chloride is reacted with the impure silicon in a halide reactor to provide trichlorosilane and silicon tetrachloride and hydrogen. The trichlorosilane and/or silicon tetrachloride are passed through purification means, and then reacted with the hydrogen from the halide reactor in a fluidized bed reactor to produce the purified silicon and an effluent comprised of unreacted trichlorosilane, silicon tetrachloride, hydrogen, and the by-product hydrogen chloride. These materials are passed through a separator and the trichlorosilane and silicon tetrachloride and hydrogen are returned to the silicon reactor while the hydrogen chloride is returned to the halide reactor to be reacted with additional industrial grade silicon.

摘要翻译： 已经开发了一种平衡的封闭循环硅精炼系统，用于从工业级硅生产电子级硅。 包含大约1％的工业级硅的杂质在炼油系统中被除去以产生纯化的硅，而仅将相对小百分比的化妆品添加到系统中。 在炼油厂，氯化氢与卤化物反应器中的不纯硅反应，得到三氯硅烷和四氯化硅和氢气。 三氯硅烷和/或四氯化硅通过纯化装置，然后在流化床反应器中与来自卤化物反应器的氢气反应，以产生纯化的硅和由未反应的三氯硅烷，四氯化硅，氢气和副产物组成的流出物， 产物氯化氢。 将这些材料通过分离器，并将三氯硅烷和四氯化硅和氢气返回到硅反应器，同时氯化氢返回到卤化物反应器以与另外的工业级硅反应。