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    • 7. 发明授权
    • Separation method of zirconium and hafnium with acidic extractants
    • 锆和铪与酸性萃取剂的分离方法
    • US08557202B1
    • 2013-10-15
    • US13667404
    • 2012-11-02
    • Korea Institute of Science and Technology
    • Hwa Young LeeByung Won ChoJoong Kee Lee
    • C22B34/00
    • C22B3/0063C22B34/14Y02P10/234
    • A separation method of zirconium and hafnium according to an example of the present invention comprising, mixing step to prepare a crude liquid for extraction, by mixing a sulfuric acid solution including zirconium and hafnium, a catalyst, and an acidic extractant; and first extraction step to form a first extract solution layer comprising the acidic extractant in which the hafnium has been extracted and a sulfuric acid solution layer separated from the first extract solution layer, wherein the acidic extractant comprises any one selected from a group consisting of D2EHPA (Di-(2-ethylhexyl)phosphoric acid), PC88A (2-Ethylhexyl phosphonic acid mono-2-ethylhexyl ester), and a combination thereof. The separation method not only saves the amount of extractant used but also increases separation effect of zirconium and hafnium known to be difficult for separating each other, without using no toxic compound such as cyan.
    • 根据本发明实施例的锆和铪的分离方法,包括:混合步骤,通过混合包含锆和铪的硫酸溶液,催化剂和酸性萃取剂来制备用于萃取的粗液体; 以及第一提取步骤,形成包含其中提取了铪的酸性萃取剂和从第一提取液层分离的硫酸溶液层的第一萃取溶液层,其中酸性萃取剂包含选自D2EHPA (2-(2-乙基己基)磷酸),PC88A(2-乙基己基膦酸单-2-乙基己基酯)及其组合。 分离方法不仅节省了使用的萃取剂的量,而且增加了已知难以分离的锆和铪的分离效果,而不使用无毒化合物如青色。
    • 9. 发明申请
    • Process for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials
    • 从锌原料和二次原料电解生产超纯锌或锌化合物的方法
    • US20040031356A1
    • 2004-02-19
    • US10641250
    • 2003-08-14
    • Tecnicas Reunidas, S.A.
    • Daniel Martin San LorenzoGustavo Diaz NogueiraMiguel Angel Garcia Leon
    • C22B019/20
    • C22B19/22C22B3/0063C22B19/26Y02P10/234
    • The process comprises the following stages: a) leaching; b) solid-liquid separation; c) neutralization of the aqueous solution; d) solid-liquid separation of the zinc-rich solution; e) zinc extraction; f) purification of the organic solvent from the extraction stage; g) stripping the ionic zinc loaded in the organic solvent; h) recovering the zinc contained in the aqueous acid solution from the stripping. The following barriers to impurities have been established: gentle leaching; alkaline pulp treatment; treatment of a small stream of aqueous solution, collected before and/or after the zinc extraction at step e); high selectivity of the dissolved zinc extraction; treatment of the zinc loaded in the organic solvent; cleaning treatment of the zinc-laden organic solvent, with an ultra-pure acid solution; partial bleeding and treatment of the stripped organic solvent; bleed of small stream of the final product producing loop, which will be recycled to the organic loop.
    • 该过程包括以下阶段:a)浸出; b)固液分离; c)中和水溶液; d)富锌溶液的固液分离; e)锌提取; f)从萃取阶段纯化有机溶剂; g)汽提负载在有机溶剂中的离子锌; h)从汽提中回收酸性水溶液中所含的锌。 以下是杂质的障碍:温和浸出; 碱性纸浆处理; 处理在步骤e)的锌提取之前和/或之后收集的小水溶液流; 溶解锌提取的高选择性; 处理负载在有机溶剂中的锌; 用含锌的有机溶剂清洗处理,用超纯酸溶液; 剥离有机溶剂的部分渗出和处理; 流出最终产物生成环的小流,这将循环到有机回路。