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    PROCESS FOR THE PREPARATION OF PURE SILICA
    2.
    发明申请
    PROCESS FOR THE PREPARATION OF PURE SILICA 审中-公开
    制备纯二氧化硅的方法

    公开(公告)号：WO2003072501A1

    公开(公告)日：2003-09-04

    申请号：PCT/IL2003/000145

    申请日：2003-02-26

    Applicant: ATI-ALUMINUM TECHNOLOGIES ISRAEL LTD. ,  SHAPIRA, Lev ,  HAREL, Simcha

    Inventor： SHAPIRA, Lev ,  HAREL, Simcha

    IPC: C01B33/10

    CPC classification number: C01B33/103 ,  C01B33/186 ,  C01P2006/12 ,  C01P2006/80 ,  C01P2006/90

    Abstract: A production process for producing high-purity silica from a crude silica source by means of fluosilic acid, including the steps of: (a) subjecting the crude silica souce and the fluosilicic acid to a reaction in a reaction stage, so as to produce silicon tetrafluoride and water; (b) selectively evaporating the silicon tetrafluoride with respect to at least a portion of at least one impurity derived from the crude silica source, and (c) reacting the silicon tetrafluoride with water to produce the high-purity silica, wherein the reaction stage (a) is performed at a temperature above 75°C.

    Abstract translation: 一种通过氟硅酸从粗二氧化硅源生产高纯度二氧化硅的生产方法，包括以下步骤：（a）在粗反应阶段对粗二氧化硅硅油和氟硅酸进行反应，以生产硅 四氟化物和水; （b）相对于来自粗二氧化硅源的至少一种杂质的至少一部分选择性地蒸发四氟化硅，和（c）使四氟化硅与水反应以产生高纯度二氧化硅，其中反应阶段 a）在75℃以上的温度下进行

    METHOD OF LEACHING BERYLLIUM VALUES USING HYDROFLUORIC ACID
    3.
    发明申请
    METHOD OF LEACHING BERYLLIUM VALUES USING HYDROFLUORIC ACID 审中-公开
    使用氢氟酸浸出二价铬的方法

    公开(公告)号：WO2004043862A1

    公开(公告)日：2004-05-27

    申请号：PCT/IL2003/000954

    申请日：2003-11-12

    Applicant: MTI - METAL TECHNOLOGIES ISRAEL LTD. ,  HAREL, Simcha ,  SHAPIRA, Lev ,  BARNEA, Eli ,  ZISNER, Tuvia

    Inventor： HAREL, Simcha ,  SHAPIRA, Lev ,  BARNEA, Eli ,  ZISNER, Tuvia

    IPC: C01F3/02

    CPC classification number: C22B35/00 ,  C01F3/02 ,  C22B3/10 ,  Y02P10/234

    Abstract: A production process for dissolving beryllium in a beryllium feed source by means of fluorine-containing compound such as hydrofluoric acid in an aqueous medium, including the steps of: (a) providing the beryllium feed source, and (b) reacting the beryllium feed source with the fluorine-containing compound in a reaction stage to produce dissolved beryllium values in the aqueous medium, and (c) processing the dissolved beryllium values to produce a refined beryllium-containing product.

    Abstract translation: 一种通过在含水介质中的含氟化合物如氢氟酸将铍溶解在铍原料源中的方法，包括以下步骤：（a）提供铍原料源，和（b）使铍原料源 与含氟化合物在反应阶段在水性介质中产生溶解的铍值，（c）处理溶解的铍值以产生精制含铍的产物。

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