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    • 5. 发明公开
    • Process for recovery of zirconium by solvent extraction
    • Verfahren zur Gewinnung von Zirkonium durch Solventextraktion。
    • EP0154448A2
    • 1985-09-11
    • EP85301135.1
    • 1985-02-20
    • Iron Ore Company of Canada
    • Witte, Margaret KentFrey, Carla Corinne
    • C22B34/14
    • C22B3/0066C01G25/003C01G25/02C01G27/003C01G27/02C01P2006/80Y02P10/234
    • A process for the recovery of zirconium from an aqueous acid solution by solvent extraction is disclosed. The process includes contacting the aqueous acid solution, which may also contain titanium and other metallic impurities, with an organic solution of a water-insoluble organic solvent and a suitable dialkyl-organophosphinic acid whereby zirconium and hafnium are selectively extracted from the aqueous solution into the organic solution with only minor amounts of coextracted titanium and other metallic impurities. The zirconium and hafnium may be subsequently stripped from the pregnant organic solution by contacting the solution with an aqueous ammonium carbonate solution whereby the zirconium and hafnium are selectively extracted from the organic solution into the aqueous ammonium carbonate solution with only trace amounts of coextracted titanium and other metallic impurities. A high purity zirconium/hafnium oxide may subsequently be precipitated from the pregnant aqueous ammonium carbonate solution by a controlled heating process.
    • 公开了通过溶剂萃取从酸性水溶液中回收锆的方法。 该方法包括使含有钛和其它金属杂质的酸性水溶液与水不溶性有机溶剂和合适的二烷基 - 有机膦酸的有机溶液接触,由此将锆和铪从水溶液中选择性提取到 只有少量共提取钛和其他金属杂质的有机溶液。 随后可以通过使该溶液与碳酸铵水溶液接触从而将锆和铪从有机溶液中剥离,由此锆和铪从有机溶液中有选择地提取到碳酸铵水溶液中,只用微量共提取的钛和其它 金属杂质。 随后可以通过受控的加热方法从怀孕的碳酸铵水溶液中沉淀出高纯度的锆/氧化铪。