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    Solvent and process for recovery of hydroxide from aqueous mixtures
    57.
    发明授权
    Solvent and process for recovery of hydroxide from aqueous mixtures 失效
    从含水混合物中回收氢氧化物的溶剂和方法

    公开(公告)号：US06322702B1

    公开(公告)日：2001-11-27

    申请号：US09404104

    申请日：1999-09-23

    申请人： Bruce A. Moyer ,  C. Kevin Chambliss ,  Peter V. Bonnesen ,  Tamara J. Keever

    发明人： Bruce A. Moyer ,  C. Kevin Chambliss ,  Peter V. Bonnesen ,  Tamara J. Keever

    IPC分类号： B01D1100

    CPC分类号： B01D11/0492 ,  C22B3/0009 ,  C22B26/10 ,  Y02P10/234

    摘要： Hydroxide values and associated alkali metal may be recovered from alkaline aqueous solutions using classes of fluorinated alcohols in a water immiscible solvent. The alcohols are characterized by fluorine substituents which are proximal to the acidic alcohol protons and are located to adjust the acidity of the extractant and the solubility of the extractant in the solvent. A method for stripping the extractant and solvent to regenerate the extractant and purified aqueous hydroxide solution is described.

    摘要翻译： 氢氧化物值和相关的碱金属可以使用在水不混溶溶剂中的氟化醇类从碱性水溶液中回收。 醇的特征在于氟取代基，其邻近酸性醇质子并且位于调节萃取剂的酸度和萃取剂在溶剂中的溶解度。 描述了用于汽提萃取剂和溶剂以再生萃取剂和纯化的氢氧化水溶液的方法。

    Method of recovering gold powder
    58.
    发明授权
    Method of recovering gold powder 失效
    黄金回收方法

    公开(公告)号：US5942024A

    公开(公告)日：1999-08-24

    申请号：US862835

    申请日：1997-05-23

    申请人： Abe Yoshifumi ,  Inomata Takehiko

    发明人： Abe Yoshifumi ,  Inomata Takehiko

    IPC分类号： C22B11/00 ,  C22B3/26 ,  C22B11/06 ,  B22F9/24

    CPC分类号： C22B3/0009 ,  C22B11/06 ,  Y02P10/234

    摘要： A method comprising the steps of solvent extracting a gold bearing chlorination leach solution with DBC, scrubbing the resulting gold bearing organic phase with hydrochloric acid and reducing gold is capable of recovering gold in high purity by:(1) adjusting the concentration of hydrochloric acid in the gold bearing chlorination leach solution to 0.5-1.75 N before the solvent extraction and then scrubbing the resulting gold bearing organic phase with 0.25-0.75 N hydrochloric acid; and/or(2) performing five-stage scrubbing with hydrochloric acid by either one of the following three approaches: i) after three-stage scrubbing, centrifugal separation is effected and separation is then performed by filtration with a filter having an opening size of 0.05-5 .mu.m, with the resulting organic phase being then subjected to two-stage scrubbing; ii) after five-stage scrubbing, centrifugal separation is effected and separation is then performed by filtration with a filter having an opening size of 0.05-5 .mu.m; or iii) after three-stage scrubbing, centrifugal separation is effected and separation is then performed by filtration with a filter having an opening size of 0.05-5 .mu.m, with the resulting organic phase being subjected to two additional stages of scrubbing, followed by centrifugal separation and separation by filtration with a filter having an opening size of 0.05-5 .mu.m.

    摘要翻译： 一种方法，包括以下步骤：用DBC溶剂提取含金氯酸浸出溶液，用盐酸洗涤所得含金有机相并还原金，能够通过以下步骤回收高纯度的金：（1）调节盐酸中的盐酸浓度 金离子氯化浸出溶液至0.5-1.75 N，然后进行溶剂萃取，然后用0.25-0.75 N盐酸洗涤得到的带有金相的有机相; 和/或（2）通过以下三种方法之一用盐酸进行五级洗涤：i）在三级洗涤之后，进行离心分离，然后通过用开口尺寸为 0.05-5μm，然后将所得有机相进行两步洗涤; ii）五级洗涤后，进行离心分离，然后用开口尺寸为0.05-5μm的过滤器过滤分离; 或iii）三段洗涤之后，进行离心分离，然后用开口尺寸为0.05-5μm的过滤器过滤分离，所得有机相进行另外两个洗涤阶段，随后进行 用开口尺寸为0.05-5μm的过滤器过滤离心分离和分离。