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    • 26. 发明公开
    • PARTICLES FORMED OF SILICA AND CARBON, AND METHOD FOR PRODUCING MIXTURE OF SILICA AND CARBON
    • 从颗粒二氧化硅和碳及其制造方法二氧化硅和碳的混合物
    • EP2730541A1
    • 2014-05-14
    • EP12806968.9
    • 2012-07-03
    • Taiheiyo Cement Corporation
    • ICHITSUBO, KoukiMASUDA, KentaSUZUKI, MasakazuKAWANO, KoheiKUMASAKA, Atsushi
    • C01B33/12C01B31/36C01B33/18
    • C01B31/36C01B32/956C01B33/193C01P2002/72C01P2004/01C01P2004/03C01P2004/61C01P2006/80
    • The invention provides a particle formed of silica and carbon which has a low impurities content and an excellent reactivity. In the particle formed of silica and carbon, the silica and carbon are each distributed throughout the particle interior, and the contents of boron (B) and phosphorus (P) are each 1 ppm or less. Also provided is a method of producing a silica and carbon-containing material which is an assembly of particles formed of silica and carbon, this method including: (B) a carbon mixing step of mixing an aqueous alkali silicate solution having a silicon (Si) concentration within the a liquid portion of at least 10 wt% with carbon so as to obtain a carbon-containing aqueous alkali silicate solution; and (C) a silica recovery step of mixing the carbon-containing aqueous alkali silicate solution obtained in the step (B) with a mineral acid so as to cause carbon (C) and silicon (Si) within the liquid portion to precipitate as particles formed of silica and carbon and thus obtaining a particle-containing liquid substance, then solid-liquid separating the particle-containing liquid substance so as to obtain a solid portion that contains a silica and carbon-containing material which is an assembly of particles formed of silica and carbon and a liquid portion that contains impurities.
    • 本发明提供了形成的二氧化硅和碳具有低杂质含量和优良的反应性的颗粒。 在形成的二氧化硅和碳,二氧化硅和碳的颗粒分别分布在整个颗粒内部,和硼(B)和磷(P)的含量各自为1ppm以下。 如此提供的是制造二氧化硅和含碳材料的所有这是在形成的二氧化硅和碳的颗粒集合体,该方法的方法,包括:(B)的羧酸混合,在具有硅wässrige碱金属硅酸盐溶液混合的步骤(Si)的 与碳的至少10重量%的液体中的部分内浓度,以便获得含碳wässrige碱金属硅酸盐溶液; 和(C),以便将液体部分以沉淀作为颗粒内引起碳(C)和硅(Si)中的工序(B)中得到的含碳wässrige碱金属硅酸盐溶液与无机酸混合的二氧化硅回收步骤 形成的二氧化硅和碳的和由此获得含有颗粒的液体物质,然后进行固液含有颗粒的液体物质分离,从而获得在部分的固体确实含有二氧化硅和含碳材料所有这些都设置在形成的颗粒的组件 二氧化硅和碳和液体部分含有杂质一样。