Method of recovering gold from dilute gold solution
    1.
    发明授权
    Method of recovering gold from dilute gold solution 有权
    从稀金溶液中回收金的方法

    公开(公告)号:US08911533B2

    公开(公告)日:2014-12-16

    申请号:US13422505

    申请日:2012-03-16

    摘要: Disclosed is a method of recovering gold from an aqueous solution having a gold concentration of 10 mg/L or lower, using a plurality of extraction apparatuses for bringing the aqueous solution into contact with an extraction agent, arranged to configure a multi-stage extraction process, the method allowing the aqueous solution to continuously flow from the first-stage extraction process to the next-stage extraction process, while recycling the extraction medium used in each stage twice or more times for the extraction process of the same stage, without back extraction and reduction.

    摘要翻译: 公开了一种使用多个用于使水溶液与提取剂接触的提取装置从金浓度为10mg / L以下的水溶液中回收金的方法,其被配置为构成多级提取方法 ,允许水溶液从第一阶段提取过程连续流动到下一阶段提取过程的方法,同时在相同阶段的萃取过程中将每个阶段中使用的萃取介质再循环两次或更多次,而无需回萃 并减少。

    METHOD FOR RECOVERING GOLD BY SOLVENT EXTRACTION
    3.
    发明申请
    METHOD FOR RECOVERING GOLD BY SOLVENT EXTRACTION 有权
    通过溶剂萃取回收金的方法

    公开(公告)号:US20130104701A1

    公开(公告)日:2013-05-02

    申请号:US13702232

    申请日:2011-06-07

    IPC分类号: C22B3/00 C25C1/20

    摘要: The invention relates to a method for recovering gold by solvent extraction from an acidic chloride-containing aqueous solution or from slurry containing gold-bearing solids using a diester-based reagent that is poorly soluble in water as organic extraction solution. In accordance with the method, gold is extracted extremely effectively, but other precious metals and many other metals quite sparingly. Gold is stripped from the extraction phase with pure water, from which the gold can be reduced either chemically or electrochemically.

    摘要翻译: 本发明涉及一种通过溶剂萃取从含酸性氯化物的水溶液或含有含金固体的浆料中回收金的方法,该方法使用难溶于水作为有机萃取溶液的二酯基试剂。 按照这种方法,黄金被非常有效地提取,而其他贵金属等许多金属则相当谨慎。 用纯水从萃取相中除去黄金,从中可以化学或电化学还原金。

    Production of high purity stable ferrate salts
    4.
    发明授权
    Production of high purity stable ferrate salts 失效
    生产高纯度稳定的高铁酸盐

    公开(公告)号:US4500499A

    公开(公告)日:1985-02-19

    申请号:US500126

    申请日:1983-06-01

    IPC分类号: C01G49/00 C22B3/26 C01D13/00

    摘要: An improved process for producing stable, high purity alkali metal or alkaline earth metal ferrate salt products is disclosed. In this process, crude ferrate salts, after being precipitated and separated from a chilled mother liquor, are purified first with a chilled anhydrous, water miscible extraction solvent to remove residual process contaminants therefrom followed by chilled oxidation resistant rinse solvent step, miscible with said extractant, followed by a drying step so as to produce a stable, purified ferrate product which can be safely stored without special provisions. Both batch and continuous modes of operation are disclosed.

    摘要翻译: 公开了一种用于生产稳定的高纯度碱金属或碱土金属高铁酸盐产品的改进方法。 在此过程中,粗制高铁酸盐在从冷却的母液中析出并分离后首先用冷冻的无水水溶性萃取溶剂进行纯化,以除去残留的工艺污染物,然后通过冷冻抗氧化冲洗溶剂步骤,与所述萃取剂混溶 ,然后进行干燥步骤,以产生稳定的纯化的高铁酸盐产品,其可以在没有特别规定的情况下安全储存。 公开了批处理和连续操作模式。

    Purification of solutions of gallium values by liquid/liquid extraction
    5.
    发明授权
    Purification of solutions of gallium values by liquid/liquid extraction 失效
    通过液/液萃取纯化镓值溶液

    公开(公告)号:US4372923A

    公开(公告)日:1983-02-08

    申请号:US326178

    申请日:1981-11-30

    摘要: Highly pure (>99.99%) aqueous solutions of gallium chloride are obtained by (i) liquid/liquid extracting an aqueous hydrochloric acid solution of gallium values with an organic phase which comprises a quaternary ammonium chloride extractant, (ii) separating the organic phase from the aqueous phase, (iii) selectively washing said organic phase by intimately contacting same with an aqueous solution of hydrochloric acid to remove any remaining impurities, whereby purified gallium values are transferred from said organic phase into an aqueous solution thereof, and (iv) then separating said organic phase from said resulting aqueous phase, whereby said aqueous phase comprises pure gallium chloride.

    摘要翻译: 通过以下步骤获得高纯度(> 99.99%)氯化镓水溶液:(i)用包含季铵氯化物萃取剂的有机相液体/液体提取镓值的盐酸水溶液,(ii)将有机相从 水相,(iii)通过与盐酸水溶液紧密接触来选择性洗涤所述有机相,以除去任何剩余的杂质,由此将纯化的镓值从所述有机相转移到其水溶液中,然后(iv)然后 从所得到的水相中分离出所述有机相,由此所述水相包括纯氯化镓。

    Process for separating and recovering rhodium and iridium from their
mixtures with other precious metals
    7.
    发明授权
    Process for separating and recovering rhodium and iridium from their mixtures with other precious metals 失效
    从其与其他贵金属的混合物中分离和回收铑和铱的方法

    公开(公告)号:US4081271A

    公开(公告)日:1978-03-28

    申请号:US780103

    申请日:1977-03-22

    申请人: Renato Ugo

    发明人: Renato Ugo

    摘要: Process for separating and recovering rhodium and/or iridium from the other precious metals (Pd, Pt, Ru, Os, Au, Ag), according to which a solution containing the precious metals in any form is treated for a time between 15 minutes and 10 hours with carbon monoxide in the presence of a quantity of water or primary or secondary alcohols at least equal in weight to the total quantity of precious metals present, the crystalline precipitate which forms, and which contains all the noble metals except Rh and Ir in a state of high purity is separated and the Rh and/or Ir are recovered practically totally from the solution.

    摘要翻译: 从其他贵金属(Pd,Pt,Ru,Os,Au,Ag)中分离和回收铑和/或铱的方法,根据该方法,将含有任何形式的贵金属的溶液处理15分钟至 在一定量的水或伯或仲醇的存在下,与一氧化碳至少等于存在的贵金属的总量,形成的结晶沉淀物,并含有除Rh和Ir之外的所有贵金属, 分离出高纯度的状态,并且几乎完全从溶液中回收Rh和/或Ir。

    Silver crystals and production thereof
    10.
    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

    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。