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。