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    METHOD FOR PRODUCING HIGH-PURITY CHLOROPOLYSILANE
    2.
    发明公开
    METHOD FOR PRODUCING HIGH-PURITY CHLOROPOLYSILANE 有权
    工艺生产高纯度CHLOROPOLYSILAN

    公开(公告)号：EP2792640A4

    公开(公告)日：2015-08-26

    申请号：EP12858134

    申请日：2012-12-06

    申请人： TOAGOSEI CO LTD

    发明人： ISHIKAWA KOUJI ,  TAKASHIMA KANEMASA ,  TAGUCHI HIROMU

    IPC分类号： C01B33/107 ,  C01B33/08

    CPC分类号： C01B33/107 ,  C01B33/08 ,  C01B33/10742

    摘要： [Problem] Chloropolysilane having a low metallic impurity concentration has been required to be obtained in order to be used for semiconductor applications. However, it is difficult by distillation to remove impurities such as a titanium compound having a vapor pressure close to that of chloropolysilane and an aluminum compound having a sublimating property. Meanwhile, when the content of metallic impurities such as aluminum and titanium reduces in metallic silicon that is a raw material, chlorination reaction is less likely to occur unless a reaction temperature is raised and that causes equipment to be restricted. It is found that a chlorination reaction can be carried out at a relatively low temperature by heating a mixture of granular metallic silicon and metallic copper or a copper compound in an inert atmosphere even when the metallic silicon has a high purity and does not contain aluminum and titanium and that chloropolysilane of high purity can be obtained by further adding metallic silicon as needed after the chlorination reaction is started.

    GECL4 AND/OR SICL4 RECOVERY PROCESS FROM OPTICAL FIBERS OR GLASSY RESIDUES AND PROCESS FOR PRODUCING SICL4 FROM SIO2 RICH MATERIALS
    9.
    发明公开
    GECL4 AND/OR SICL4 RECOVERY PROCESS FROM OPTICAL FIBERS OR GLASSY RESIDUES AND PROCESS FOR PRODUCING SICL4 FROM SIO2 RICH MATERIALS 审中-公开
    用于光纤或玻璃渣和工艺蒸汽回收GeCl4和/或四氯化硅用于生产四氯化硅从SIO2丰富的材料

    公开(公告)号：EP2222602A1

    公开(公告)日：2010-09-01

    申请号：EP08857957.8

    申请日：2008-12-01

    申请人： Institut National de la Recherche Scientifique

    发明人： BERGERON, Mario ,  LANGLAIS, Alain

    IPC分类号： C01G17/04 ,  C01B33/08

    CPC分类号： C01G17/04 ,  C01B33/1071 ,  C03C1/024

    摘要： A method is provided for producing GeCl4 with or without SiCl4 from optical fibers, the method comprises the steps of: reacting comminuted optical fibers including germanium and optionally silicon oxides with a reagent including a solid carbonaceous reducing agent, chlorine and a boron compound to obtain a gaseous product including gaseous GeCl4, gaseous SiCl4, and gaseous BCl3 in accordance with the reactions: 2BCl3(g) + 1.5GeO2 = 1.5GeCl4(g) + B2O3; 2BCl3(g) + 1.5 SiO2 = 1.5 SiCl4(g) + B2O; B2O3 + 1.5C + 3Cl2 = 2BCl3(g) + 1.5CO2; and then condensing the gaseous GeCl4, BCl3 and optionally SiCl4 into liquid GeCl4, BCl3 and optionally SiCl4. The invention further provides a method for producing SiCl4 (and optionally GeCl4) from glassy residues obtained from optical fiber manufacturing and wasted optical cables. The method includes the steps of: reacting comminuted glassy residues with a reagent including a solid carbonaceous reducing agent, a salt, a boron compound to obtain a gaseous product including SiCl4, BCl3, and optionally GeCl4; and then condensing the gaseous SiCl4, BCl3 (with or without GeCl4) into liquid SiCl4, BCl3 and GeCl4. There is also provided a method for producing SiCl4 from a SiO2 containing material.