Solvent extraction of platinum group metals
    35.
    发明授权
    Solvent extraction of platinum group metals 失效
    铂族金属溶剂萃取

    公开(公告)号:US4382067A

    公开(公告)日:1983-05-03

    申请号:US338054

    申请日:1982-01-08

    申请人: Richard A. Grant

    发明人: Richard A. Grant

    IPC分类号: C01G55/00 C22B3/26

    摘要: This invention relates to the separation and purification of the platinum group metals; more particularly it relates to the separation of mixtures of Pt and/or Pd from Rh and/or Ru.In more detail, the present invention relates to a process for the separation or purification of platinum group metals in which either platinum, iridium (IV) and/or palladium (II) are present in aqueous solution together with one or more other platinum group or base metals comprising the steps of:(a) adjusting the acidity, if necessary, to provide a pH less than 7;(b) contacting the said aqueous solution with an organic phase containing at least one nitrogen containing organic compound selected from the group consisting of primary, secondary and tertiary amines and quarternary ammonium compounds and at least one oxygen containing organic compound selected from the group consisting of alcohols, phenols and carboxylic acids;(c) removing from contact with the said solution the said organic phase now containing the platinum, iridium (IV) and/or palladium (II) extracted together with the nitrogen- and oxygen-containing organic compounds; and(d) contacting the organic phase obtained at stage (c) above with a strongly acidic solution and thus stripping the platinum, iridium and/or palladium from the said organic phase and obtaining an aqueous solution of the said metals.

    摘要翻译: 本发明涉及铂族金属的分离和纯化; 更具体地涉及Pt和/或Pd与Rh和/或Ru的混合物的分离。 更详细地说,本发明涉及一种用于分离或纯化铂族金属的方法,其中铂,铱(IV)和/或钯(II)与一种或多种其它铂族基团一起存在于水溶液中,或 包括以下步骤:(a)如果需要,调节酸度以提供小于7的pH; (b)使所述水溶液与含有至少一种选自伯胺,仲胺和叔胺和季铵化合物的至少一种含氮有机化合物和至少一种含氧有机化合物接触,所述有机化合物选自: 醇,酚和羧酸; (c)除去与所述溶液的接触,所述有机相现在含有与含氮和氧的有机化合物一起提取的铂,铱(IV)和/或钯(II); 和(d)使上述阶段(c)获得的有机相与强酸性溶液接触,从而从所述有机相中汽提铂,铱和/或钯并获得所述金属的水溶液。

    Ruthenium recovery process by solvent extraction
    38.
    发明授权
    Ruthenium recovery process by solvent extraction 失效
    钌回收工艺通过溶剂萃取

    公开(公告)号:US4282112A

    公开(公告)日:1981-08-04

    申请号:US116588

    申请日:1980-01-29

    摘要: Process for the recovery of the ruthenium present in an aqueous nitric solution, wherein the ruthenium is extracted in an organic solvent by contacting the nitric solution with an organic phase comprising an organophosphorous compound having at least one electron donor sulphur atom in the presence of a compound able to displace NO.sup.+ ions of the ruthenium complexes present in the nitric solution. Application to the recovery of ruthenium contained in a nitric solution obtained by dissolving irradiated fuel elements.

    摘要翻译: 用于回收存在于硝酸水溶液中的钌的方法,其中通过在化合物存在下使硝酸溶液与包含具有至少一个电子给体硫原子的有机磷化合物的有机相接触,在有机溶剂中萃取钌 能够置换存在于硝酸溶液中的钌络合物的NO +离子。 适用于通过溶解照射的燃料元素而获得的硝酸溶液中所含的钌的回收。

    Separation and selective recovery of platinum and palladium by solvent
extraction
    40.
    发明授权
    Separation and selective recovery of platinum and palladium by solvent extraction 失效
    通过溶剂萃取分离和选择性回收铂和钯

    公开(公告)号:US4041126A

    公开(公告)日:1977-08-09

    申请号:US642146

    申请日:1975-12-18

    IPC分类号: C01G55/00 C22B3/28

    摘要: A process for the separation and selective recovery of platinum and palladium values from an acidic aqueous medium which comprises contacting the medium with a mixed organic extraction reagent comprising a water immiscible organic solvent having dissolved therein an organically substituted secondary amine compound capable of forming complexes of platinum and palladium that are preferentially soluble in the organic solvent and whereby the contacting results in creation of an organic extract phase and an aqueous raffinate phase. After phase separation, palladium is selectively recovered by contacting the organic phase with an aqueous solution of an acidified reducing agent. Platinum is separately recovered by contacting the organic phase with an aqueous alkaline solution. The process may be employed as a method for concentrating solutions of platinum or palladium.

    摘要翻译: 一种用于从酸性水性介质中分离和选择性回收铂和钯值的方法,其包括使介质与含有水溶性有机溶剂的混合有机萃取剂接触,所述混合有机萃取剂溶解有能够形成铂络合物的有机取代的仲胺化合物 和优选可溶于有机溶剂的钯,由此接触导致产生有机萃取相和含水萃余相。 相分离后,通过使有机相与酸化还原剂的水溶液接触来选择性地回收钯。 通过使有机相与碱性水溶液接触来分别回收铂。 该方法可以用作浓缩铂或钯溶液的方法。