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METHOD FOR CYCLICALLY PREPARING MONOMER BORON AND COPRODUCING SODIUM CRYOLITE USING SODIUM FLUOBORATE AS INTERMEDIATE MATERIAL
METHOD FOR CYCLICALLY PREPARING MONOMER BORON AND COPRODUCING SODIUM CRYOLITE USING SODIUM FLUOBORATE AS INTERMEDIATE MATERIAL
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机译:氟硼酸钠为中间材料循环制备单价硼并共同生产冰晶酸钠的方法
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摘要
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; 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.
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