...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Coordination chemistry reviews >Co-extraction of cations and anions in base metal recovery
【24h】

Co-extraction of cations and anions in base metal recovery

机译：贱金属回收中阳离子和阴离子的共萃取

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Solvent extraction is used increasingly in extractive hydrometallurgy. Conventionally, for base metal recovery, metal cations are transferred selectively to a water-immiscible phase using ligands as ion-exchangers which release an equivalent number of cations, usually protons, back to the aqueous feed solution. This review focuses on a new type of extractant, polytopic zwitterionic ligands, which transfers metal salts into a water-immiscible phase. The systems discussed have metal-coordinating sites based on salicylaldimines or salicylaldoximes and the anion-binding sites are provided by pendant alkyl ammonium groups which sometimes also contain amido moieties to enhance the anion-uptake. These new reagents provide an alternative strategy for the concentration and separation of the metal values which eliminates the necessity of proton transfer, thus opening new flowsheets with good materials balances. In many cases anion- and cation-loading prove to be co-operative processes.
机译：在萃取湿法冶金中越来越多地使用溶剂萃取。常规上，对于贱金属的回收，使用配体作为离子交换剂将金属阳离子选择性地转移到与水不混溶的相中，所述配体将等价的阳离子（通常是质子）释放回给料水溶液。这篇综述着重于一种新型的萃取剂，多性两性离子配体，它将金属盐转移到与水不混溶的相中。所讨论的系统具有基于水杨醛亚胺或水杨醛肟的金属配位位点，并且阴离子结合位点由侧基烷基铵基团提供，该烷基铵基团有时还含有酰胺基以增强阴离子的吸收。这些新试剂为金属值的浓缩和分离提供了另一种策略，从而消除了质子转移的必要性，从而打开了具有良好物料平衡的新流程。在许多情况下，阴离子和阳离子的负载被证明是合作的过程。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号