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Recovery of gold and silver from ammoniacal thiosulfate solutions containing copper by resin ion exchange method.

机译:通过树脂离子交换法从含铜的氨硫代硫酸盐溶液中回收金和银。

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摘要

This research was undertaken to study the suitable physico-chemical conditions for the selective recovery of gold and silver from simulated thiosulfate leach liquors containing copper, gold or silver, ammonia and thiosulfate using three anion exchange resins. In particular, the effect of chemical variables such as thiosulfate, cupric ion and ammonia concentrations and the solution potential of the system on the batch loading of silver and gold onto the resins have been investigated in detail. Pourbaix diagrams have been constructed to understand the stability of this complex system under various Eh and pH conditions. The experimental results indicate that IRA-400 resin has the highest capacity for both silver and gold compared to IRA-68 and IRA-94. All the three resins investigated are not selective to silver and gold over copper. The elution studies using ammonium thiosulfate solutions have revealed that selective elution of silver from copper is not possible, while some selectivity can be achieved between gold and copper. (Abstract shortened with permission of author.)
机译:进行了这项研究,以研究使用三种阴离子交换树脂从含有铜,金或银,氨和硫代硫酸盐的模拟硫代硫酸盐浸出液中选择性回收金和银的合适物理化学条件。尤其是,已经详细研究了化学变量(例如硫代硫酸盐,铜离子和氨的浓度)以及系统的溶液电势对将银和金分批装载到树脂上的影响。已构造了Pourbaix图以了解该复杂系统在各种Eh和pH条件下的稳定性。实验结果表明,与IRA-68和IRA-94相比,IRA-400树脂具有最高的银和金容量。所研究的所有三种树脂对银和金的选择性均不如铜。使用硫代硫酸铵溶液的洗脱研究表明,不可能从铜中选择性洗脱银,而在金和铜之间可以实现一定的选择性。 (摘要经作者许可缩短。)

著录项

  • 作者

    Atluri, Vasudeva Prasad.;

  • 作者单位

    The University of Arizona.;

  • 授予单位 The University of Arizona.;
  • 学科 Engineering Chemical.;Engineering Materials Science.;Engineering Metallurgy.;Engineering Mining.
  • 学位 M.S.
  • 年度 1987
  • 页码 219 p.
  • 总页数 219
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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