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    Method for Suppressing the Leachability of Certain Metals
    2.
    发明申请
    Method for Suppressing the Leachability of Certain Metals 审中-公开
    抑制某些金属的浸出性的方法

    公开(公告)号：US20060198773A1

    公开(公告)日：2006-09-07

    申请号：US11306704

    申请日：2006-01-09

    Applicant: Hans-Joachim Lunk ,  Ricky Morgan ,  Henry Stevens

    Inventor： Hans-Joachim Lunk ,  Ricky Morgan ,  Henry Stevens

    IPC: C22B34/30 ,  C01G41/00 ,  C01G37/14 ,  C01G37/00

    CPC classification number: B09C1/002 ,  A62D3/33 ,  A62D2101/24 ,  A62D2101/43 ,  B09C1/08 ,  C22B13/00 ,  C22B34/36

    Abstract: The interaction of Sn, Sb and Pb with tungsten in contact with an aqueous medium has a synergistic effect in which the leachability of each metal is suppressed. This means that tungsten has the ability to suppress the leachability of these same metals, in particular lead. For example, tungsten may be added to the lead-contaminated soil in order to suppress lead contamination of the ground water by forming lead tungstate which has a very low solubility.

    Abstract translation: Sn，Sb和Pb与钨与水介质接触的相互作用具有抑制每种金属的浸出性的协同效应。 这意味着钨具有抑制这些相同金属，特别是铅的可浸出性的能力。 例如，可以通过形成具有非常低的溶解度的钨酸铅来将钨添加到铅污染的土壤中，以便抑制地下水的铅污染。

    Recovery of base materials from geothermal brines
    3.
    发明授权
    Recovery of base materials from geothermal brines 失效
    从地热盐水回收基础材料

    公开(公告)号：US5229003A

    公开(公告)日：1993-07-20

    申请号：US763446

    申请日：1991-09-19

    Applicant: Willem P. C. Duyvesteyn

    Inventor： Willem P. C. Duyvesteyn

    IPC: C22B19/20 ,  B01D11/04 ,  C22B20060101 ,  C22B3/32 ,  C22B13/00 ,  C25C1/16

    CPC classification number: C22B19/20 ,  C22B11/04 ,  C22B13/00 ,  C22B19/26 ,  C22B3/0022 ,  C22B3/42 ,  Y02P10/234

    Abstract: A process is provided for the recovery of substantially pure zinc from geothermal brine also containing recoverable amounts of lead and silver. The process comprises selectively extracting lead and silver from the brine and then contacting the brine impoverished in lead and silver with a substantially insoluble organic extractant (e.g., an ion exchange resin [IX] or an organic solvent [SX]) selective to the extraction of zinc to produce a spent brine, and a zinc-loaded organic extractant. The zinc-loaded organic extractant is separated from the spent brine and the zinc-loaded extractant is contacted with an aqueous solution to remove the zinc as an aqueous zinc chloride solution. The pH of the zinc solution is adjusted, if necessary, to a level to condition the solution to promote the extraction thereof by a cationic organic solvent. The zinc is then extracted from the zinc-loaded aqueous solution using a cationic organic solvent (SX) or an ion exchange resin (IX) selective to the extraction of zinc, thereby producing a zinc-loaded cationic extractant which is separated from the aqueous solution. The zinc is then stripped from the zinc-loaded cationic extractant using an amount of sulfuric acid by volume sufficient to provide an electrolyte solution containing a concentration of zinc sufficient for the recovery thereof by electrowinning. Thus, the process may comprise an SX-SX, or an IX-SX, or an SX-IX or an IX-IX system.

    Abstract translation: 提供了一种从含有可回收量的铅和银的地热卤水回收基本上纯的锌的方法。 该方法包括从盐水中选择性提取铅和银，然后使在铅和银中被贫困的盐水与基本上不溶的有机萃取剂（例如，离子交换树脂[IX]或有机溶剂[SX]）接触， 锌以产生废盐水，以及负载锌的有机萃取剂。 将锌负载的有机萃取剂与废盐水分离，并将负载锌的萃取剂与水溶液接触以除去作为氯化锌水溶液的锌。 如果需要，将锌溶液的pH调节至使溶液调节以促进其通过阳离子有机溶剂萃取的水平。 然后使用对萃取锌有选择性的阳离子有机溶剂（SX）或离子交换树脂（IX）从锌负载的水溶液中提取锌，从而制备与水溶液分离的负载锌的阳离子萃取剂 。 然后使用一定量的足够的硫酸量从负载锌的阳离子萃取剂中剥离锌，以提供含有足以通过电解沉积回收的锌浓度的电解质溶液。 因此，该过程可以包括SX-SX或IX-SX或SX-IX或IX-IX系统。

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