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100 条记录 (耗时 0.014 秒)

    Silver crystals and production thereof
    41.
    发明授权
    Silver crystals and production thereof 失效
    银晶及其生产

    公开(公告)号：US3992197A

    公开(公告)日：1976-11-16

    申请号：US559532

    申请日：1975-03-18

    申请人： Paul W. Wetzold

    发明人： Paul W. Wetzold

    IPC分类号： B22F9/24 ,  C01G5/00 ,  C09D5/38 ,  C22B3/26 ,  C22B11/00 ,  C30B7/14 ,  C22B11/04

    CPC分类号： C22B11/04 ,  B22F9/24 ,  C01G5/003 ,  C09D5/38 ,  C22B3/0009 ,  C30B7/14 ,  Y02P10/234 ,  Y10S75/954

    摘要： Thin flat hexagonal silver crystals are formed by rapidly mixing at a temperature of 30.degree.-80.degree. C., a water solution of inorganic silver salt containing a chelating agent for ferric iron with a water solution of ferrous sulfate containing sulfuric acid and additional chelating agent. The preferred chelating agent is phosphoric acid, and the crystals which are formed are stabilized by the addition of a protective colloid such as polyvinyl alcohol.

    摘要翻译： 通过在30〜80℃的温度下快速混合，将含有铁的螯合剂的无机银盐水溶液与含有硫酸的硫酸亚铁的水溶液和另外的螯合剂形成薄平的六方晶银晶体 。 优选的螯合剂是磷酸，所形成的晶体通过加入保护胶体如聚乙烯醇来稳定。

    Ammonium thiosulfate complex of gold or silver and an amine
    47.
    发明授权
    Ammonium thiosulfate complex of gold or silver and an amine 失效
    金或银的硫代硫酸铵配合物和胺

    公开(公告)号：US06197214B1

    公开(公告)日：2001-03-06

    申请号：US09299339

    申请日：1999-04-26

    申请人： Michael J. Virnig ,  J. Michael Sierakoski

    发明人： Michael J. Virnig ,  J. Michael Sierakoski

    IPC分类号： C09K300

    CPC分类号： C01G5/003 ,  C01G7/003 ,  C07C279/16 ,  C07C2601/14 ,  C07G17/00 ,  C22B3/0012 ,  C22B3/0016 ,  C22B3/12 ,  C22B3/14 ,  C22B11/04 ,  Y02P10/234

    摘要： The process of recovering precious metals from ores containing precious metals, such as gold and silver, from an aqueous ammoniacal thiosulfate leach solution to provide a significant practical and economical process for the recovery of gold or silver. After leaching of the ore with an aqueous ammoniacal thiosulfate solution, the leach solution is contacted with a precious metal extraction reagent to extract the precious metal values from the leach solution, after which the precious metal values are stripped from the extraction reagent to form a concentrated solution of the precious metal values from which the precious metals may be recovered by conventional methods such as electrolysis. The extraction reagents are those having guanidyl functionality or a quaternary amine functionality mixed with a weak organic acid such as a phenol. In the process, novel thiosulfate complexes of the precious metals are formed with the quanidyl or the quaternary amine extractants.

    摘要翻译： 从含有硫代硫酸铵水溶液的含水金属中回收含贵金属的矿石中的贵金属的过程，为回收金或银提供了重要的实用经济的工艺。 在用含硫代硫酸铵水溶液浸出矿石后，将浸出溶液与贵金属萃取剂接触，从浸出溶液中提取贵金属值，然后从提取试剂中汽提出贵金属离子形成浓缩的 可以通过电解等常规方法回收贵金属的贵金属价值的溶液。 提取试剂是具有胍基官能度的那些或与弱有机酸如苯酚混合的季胺官能团。在该方法中，贵金属的新型硫代硫酸盐络合物与仲胺或季胺萃取剂形成。

    Process for the isolation of noble metals
    48.
    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

    申请人： Reinhold Schulze

    发明人： Reinhold Schulze

    IPC分类号： C22B11/00 ,  C01G5/00 ,  C01G7/00 ,  C01G55/00 ,  C22B3/16

    CPC分类号： C01G5/003 ,  C01G55/001 ,  C01G7/003 ,  C22B3/1616 ,  C22B3/24 ,  C22B3/42 ,  Y02P10/234

    摘要： 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.

    摘要翻译： 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。

    Utilization of oxygen in leaching and/or recovery procedures employing carbon
    49.
    发明授权
    Utilization of oxygen in leaching and/or recovery procedures employing carbon 失效
    使用碳在浸出和/或回收程序中使用氧气

    公开(公告)号：US4816234A

    公开(公告)日：1989-03-28

    申请号：US102742

    申请日：1987-09-23

    申请人： Robert J. Brison ,  Carl L. Elmore ,  Phillip Mitchell

    发明人： Robert J. Brison ,  Carl L. Elmore ,  Phillip Mitchell

    IPC分类号： C01G5/00 ,  C01G7/00 ,  C22B11/08 ,  B01D11/00 ,  C22B3/00

    CPC分类号： C22B11/08 ,  C01G5/003 ,  C01G7/003 ,  C22B3/0005 ,  C22B3/42 ,  Y02P10/234

    摘要： In gold and/or silver cyanide leaching-adsorption processes employing solid adsorbents such as activated charcoal, the overall efficiency in the recovery of gold and/or silver from ores or the like is greatly increased by contacting the cyanide slurry containing the gold and/or silver, with oxygen gas instead of normal air. A generally pure oxygen gas can be bubbled into a vessel containing the slurry, and a cover (e.g. a floating cover) may be provided on the vessel to reduce the oxygen transfer out of the solution and to facilitate pressurization of the system with an oxygen atmosphere. The procedures of the invention are applicable to carbon-in-pulp (CIP), and carbon-in-leach (CIL) processes and related processes using resins. Deaeration of the ore slurry can be practiced prior to the introduction of the oxygen.

    摘要翻译： 在使用活性炭等固体吸附剂的金和/或氰化银浸出 - 吸附方法中，通过使包含金和/或金的氰化物浆料接触，使来自矿石等的金和/或银的回收的总效率大大增加 银，用氧气代替正常的空气。 可以将通常纯的氧气鼓泡到含有浆料的容器中，并且可以在容器上提供覆盖物（例如浮动盖）以减少氧气从溶液中的转移并促进系统与氧气氛的加压 。 本发明的方法适用于使用树脂的纸浆（CIP）和碳浸出（CIL）工艺和相关工艺。 矿浆的脱气可以在引入氧之前进行。

    Recovery of precious metals from a thiourea leach
    50.
    发明授权
    Recovery of precious metals from a thiourea leach 失效
    从硫脲浸出中回收贵金属

    公开(公告)号：US4778519A

    公开(公告)日：1988-10-18

    申请号：US35388

    申请日：1987-04-07

    申请人： Batric Pesic

    发明人： Batric Pesic

    IPC分类号： C01G5/00 ,  C01G7/00 ,  C22B7/02 ,  C22B11/00 ,  C22B11/04

    CPC分类号： C01G7/003 ,  C01G5/003 ,  C22B11/04 ,  C22B11/042 ,  C22B11/044 ,  C22B11/046 ,  C22B3/24 ,  C22B7/02 ,  Y02P10/214 ,  Y02P10/234 ,  Y02P10/236

    摘要： A method is provided for recovering gold and silver from precious metal bearing materials including ores, leaching residues, flue dust, electronic scrap, jewelry scrap, etc. In the method, the gold and silver are extracted from the precious metal bearing materials with a thiourea solution to form a thiourea leach, and the thiourea leach is contacted with carbon to adsorb the gold and silver and provide loaded carbon. The method is characterized by the step of contacting an alkaline solution of thiousulfate ion with the loaded carbon thereby desorbing the precious metals form the carbon. In one modification of the method, an additional step includes adding a salt to the aqueous thiousulfate solution. When needed, the method includes the step of protecting the thiousulfate ion from oxidizing agents. This is done by adding a reducing agent such as sodium sulfite to the thiousulfate solution. When copper is present, the method includes the addtional step of removing copper from the carbon prior to exposing the carbon to the thiourea solution containing the precious metals.

    摘要翻译： 提供从贵金属轴承材料（包括矿石，浸出残渣，烟尘，电子废料，珠宝废料等）中回收金和银的方法。在该方法中，金和银从含有硫脲的贵金属轴承材料中提取 溶液形成硫脲浸出，硫脲浸出物与碳接触以吸附金和银并提供负载的碳。 该方法的特征在于使硫酸根离子的碱性溶液与负载的碳接触，从而从碳解吸贵金属。 在该方法的一个修改中，另外的步骤包括向硫酸水溶液中加入盐。 当需要时，该方法包括保护硫酸根离子免于氧化剂的步骤。 这是通过向硫酸盐溶液中加入还原剂如亚硫酸钠来完成的。 当存在铜时，该方法包括在将碳暴露于含有贵金属的硫脲溶液之前从碳上除去铜的附加步骤。