Process for the isolation of noble metals
    4.
    发明授权
    Process for the isolation of noble metals 失效
    贵金属分离方法

    公开(公告)号:US4925485A

    公开(公告)日:1990-05-15

    申请号:US686421

    申请日:1984-12-26

    Inventor: Reinhold Schulze

    Abstract: The present invention involves the isolation or leaching of noble metals from materials containing noble metals, e.g. ores, by treating the noble metal- containing materials with a cyclic thiourea derivative under acid pH conditions. Removal is effected by adsorption onto charcoal or by an ion exchanger, for example. Preferred cyclic thioureas are N,N'-ethylenethiourea and N,N'-propylenethiourea and the acid pH conditions may be achieved by sulfuric acid or hydrochloric acid solutions containing 0.01 to 2.0% by weight of the cyclic thiourea.

    Abstract translation: 本发明涉及从含贵金属的材料中分离或浸出贵金属,例如, 通过在酸性pH条件下用环状硫脲衍生物处理含贵金属的物质。 例如,通过吸附到木炭上或通过离子交换器进行去除。 优选的环状硫脲是N,N'-亚乙基硫脲和N,N'-丙基硫脲,酸性pH条件可以通过含有0.01至2.0重量%的环硫脲的硫酸或盐酸溶液来实现。

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