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    • 3. 发明授权
    • Production of iron orthophosphate
    • 生产正磷酸铁
    • US08574518B2
    • 2013-11-05
    • US13203337
    • 2010-02-19
    • Gunnar BuehlerKilian Schwarz
    • Gunnar BuehlerKilian Schwarz
    • C01G49/00C01B25/26
    • C01B25/375B82Y30/00C01P2004/62C01P2004/64C01P2006/10C01P2006/80H01M4/5825
    • A process for the production of iron (III) orthophosphate of the general formula FePO4×nH2O (n≦2.5) comprising: a) producing an aqueous solution containing Fe2+ ions by introducing, iron (II), iron (III) or mixed iron (II, III) compounds selected from hydroxides, oxides, oxide hydroxides, oxide hydrates, carbonates and hydroxide carbonates, together with elementary iron, into a phosphoric acid-bearing aqueous medium, to dissolve Fe2+ ions and to react Fe3+ with elementary Fe in a comproportionation reaction to give Fe2+; b) separating solids from the phosphoric-acid aqueous Fe2+ solution, and c) adding an oxidation agent to the phosphoric-acid aqueous Fe2+ solution to oxidize iron (II) in the solution to precipitate iron (III) orthophosphate of the general formula FePO4×nH2O. The invention includes the product of the process and its use to make LiFePO4 for batteries.
    • 一种制备通式FePO4×nH2O(n@2.5)的正磷酸铁(III)的方法,包括:a)通过引入铁(II),铁(III)或混合铁(),制备含有Fe 2+离子的水溶液 II,III)选自氢氧化物,氧化物,氧化物氢氧化物,氧化物水合物,碳酸盐和氢氧化物碳酸盐的化合物与元素铁一起转化成含磷酸的水性介质,以溶解Fe 2+离子并使Fe 3+与基本的Fe反应在比例 反应得到Fe2 +; b)从磷酸Fe2 +水溶液中分离固体,和c)向磷酸水溶液中加入氧化剂以氧化溶液中的铁(II),以沉淀出通式FePO4的正磷酸铁(Ⅲ)× nH2O。 本发明包括该方法的产物及其制备用于电池的LiFePO 4的用途。