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    • 15. 发明公开
    • Method for cyclically preparing boron and coproducing sodium cryolite using sodium fluoborate as intermediate material
    • 一种用于硼和同时生产钠的环状制造方法与氟硼酸钠冰晶石作为中间
    • EP2631217A1
    • 2013-08-28
    • EP12195388.9
    • 2012-12-04
    • Shenzhen Sunxing Light Alloys Materials Co., Ltd
    • Chen, XueminYu, YuemingYe, QingdongYang, JunZhou, Zhi
    • C01B35/06C01B35/02C01B31/20
    • C01B35/023B82Y30/00B82Y40/00C01B32/50C01B35/06C01F7/54C01F7/762C25C3/18
    • The disclosure discloses a method for cyclically preparing monomer boron and coproducing sodium cryolite using sodium fluoborate as an intermediate material, which includes the following steps: A) adding hydrofluoric acid to boric acid or boron oxide to enable a reaction to form fluoboric acid; B) adding a sodium carbonate aqueous solution to the fluoboric acid to enable a reaction to form the sodium fluoborate; C) putting the sodium fluoborate into a reactor, adding aluminium to react with the sodium fluoborate to form the monomer boron and sodium cryolite, or, putting the aluminium into the reactor, and adding the sodium fluoborate to react with the aluminium to form the monomer boron and sodium cryolite; D) extracting the sodium cryolite, sending the sodium cryolite to a rotary reaction kettle together with concentrated sulphuric acid to enable a reaction to form hydrogen fluoride gas and aluminium sodium sulphate, collecting the hydrogen fluoride gas and dissolving it into water to obtain the hydrofluoric acid; E) recycling the obtained hydrofluoric acid to Step A to leach the boric acid or boron oxide. The disclosure can recycle the coproduct sodium cryolite, thereby shortening the process of preparing monomer boron, reducing the comprehensive cost of production, improving the production efficiency and reducing environmental pollution.
    • 本公开盘松的方法用于循环地制备单体硼和氟硼酸使用钠作为中间材料,其包括以下步骤联产钠冰晶石:a)将氢氟酸与硼酸或氧化硼,以使反应以形成氟硼酸; B)加入碳酸钠溶液至wässrige氟硼酸,以使反应以形成氟硼酸钠; C)把氟硼酸钠到反应器中,添加铝与氟硼酸钠反应以形成单体硼和钠冰晶石,或者,把铝进入反应器,并添加氟硼酸钠,以与铝反应以形成所述单体 硼和钠冰晶石; D)提取钠冰晶石,用浓硫酸一起发送钠冰晶石到旋转式反应釜中,以使反应形成氟化氢气体和硫酸铝钠,收集氟化氢气体,并将其溶解在水中以获得氢氟酸 ; E)回收获得的步骤A到浸出硼酸或氧化硼的氢氟酸。 本发明可以回收副产物冰晶石钠,从而缩短制备单体硼,降低了生产成本全面,提高生产效率和减少环境污染的过程。