公开(公告)号：US09862612B2

公开(公告)日：2018-01-09

申请号：US14408006

申请日：2013-05-22

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Shinji Ishikawa ,  Toru Adachi ,  Taiichiro Yamashita

IPC: C01B33/033 ,  C01B33/021 ,  C01B32/00 ,  C01B32/05

CPC classification number: C01B33/033 ,  C01B32/00 ,  C01B32/05 ,  C01B33/021

Abstract: The method for producing silicon metal and porous carbon from rice hulls is provided. The method comprises a first step S1 of producing a rice hull charcoal M2 containing SiO2 and C by heat treatment of rice hulls M1; a second step S4 of exposing the rice hull charcoal M4 to at least any one of heated first inert gas G2 or reducing gas to produce SiC; a third step S5 of exposing SiC to a heating atmosphere containing Cl2 gas to produce SiCl4 and porous carbon P1; a fourth step S7 of reacting SiCl4 and Zn to produce silicon metal P2 and ZnCl2; and a fifth step S9 of electrolyzing ZnCl2 to produce Zn and Cl2 gas. The Cl2 gas in the fifth step S9 is used in the third step S5, and Zn in the fifth step S9 is used in the fourth step S7.

公开(公告)号：US20150104370A1

公开(公告)日：2015-04-16

申请号：US14408006

申请日：2013-05-22

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Shinji Ishikawa ,  Toru Adachi ,  Taiichiro Yamashita

IPC: C01B33/033 ,  C01B31/02

CPC classification number: C01B33/033 ,  C01B32/00 ,  C01B32/05 ,  C01B33/021

Abstract: The method for producing silicon metal and porous carbon from rice hulls is provided. The method comprises a first step S1 of producing a rice hull charcoal M2 containing SiO2 and C by heat treatment of rice hulls M1; a second step S4 of exposing the rice hull charcoal M4 to at least any one of heated first inert gas G2 or reducing gas to produce SiC; a third step S5 of exposing SiC to a heating atmosphere containing Cl2 gas to produce SiCl4 and porous carbon P1; a fourth step S7 of reacting SiCl4 and Zn to produce silicon metal P2 and ZnCl2; and a fifth step S9 of electrolyzing ZnCl2 to produce Zn and Cl2 gas. The Cl2 gas in the fifth step S9 is used in the third step S5, and Zn in the fifth step S9 is used in the fourth step S7.

Abstract translation: 提供了从稻壳生产硅金属和多孔碳的方法。 该方法包括：通过热处理稻壳M1生产含有SiO 2和C的稻壳炭M2的第一步骤S1; 将米壳炭M4暴露于加热的第一惰性气体G2或还原气体中的至少一种以产生SiC的第二步骤S4; 将SiC暴露于含有Cl 2气体的加热气氛中以产生SiCl 4和多孔碳P1的第三步骤S5; 使SiCl4和Zn反应生成硅金属P2和ZnCl 2的第四步骤S7; 以及电解ZnCl 2以产生Zn和Cl 2气体的第五步骤S9。 在第五步骤S9中使用第五步骤S9中的Cl2气体，在第四步骤S7中使用第五步骤S9中的Zn。