REVIEW OF THE APPLICATION OF ION EXCHANGE RESINS FOR THE RECOVERY OF PLATINUM-GROUP METALS FROM HYDROCHLORIC ACID SOLUTIONS
REVIEW OF THE APPLICATION OF ION EXCHANGE RESINS FOR THE RECOVERY OF PLATINUM-GROUP METALS FROM HYDROCHLORIC ACID SOLUTIONS
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DOI：
10.1080/08827508.2013.764875
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发表时间：
2014-11-02
影响因子：
5
通讯作者：
Ang, Kwang-Loon
中科院分区：
文献类型：
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作者：
Nikoloski, Aleksandar N.;Ang, Kwang-Loon
铂族金属 (PGM) 已成为现代科学时代最受欢迎的稀有金属之一，并且由于其在清洁空气技术中的优势用途，其重要性将继续增加。由于这些贵金属的稀缺性，应用离子交换工艺从相对未受污染的水溶液中回收铂族金属离子，例如通过浸出二手汽车催化转换器和电子废料等二次来源产生的铂族金属离子，正在成为一种越来越具有成本效益的选择，因此成为铂族金属生产行业的一个重要课题。本文概述了与使用离子交换树脂湿法冶金回收铂族金属相关的基本原理和理论，并对影响最初以离子状态存在于盐酸水溶液中的铂族金属分离和纯化的最重要因素进行了回顾和讨论。结果表明，在这些酸性氯化物溶液（目前选择的 PGM 浸出系统）中，PGM 离子在螯合离子交换树脂上的吸附行为强烈依赖于存在的阴离子 PGM 氯络合物物质。此外，表明影响这种络合的主要因素是（i）接触的氯化物水溶液的酸度和氯离子浓度，（ii）溶液的老化，以及（iii）溶液的温度。
Platinum-group metals (PGMs) have become one of the most sought after rare metals in this modern age of science and they will continue to increase in importance as a result of their advantageous use in clean-air technology. Due to the scarcity of these precious metals, the application of ion exchange processes to recover PGM ions from relatively uncontaminated aqueous solutions, such as produced by the leaching of secondary sources including used automotive catalytic converters and electronic scrap, is becoming an increasingly cost-effective option and hence an important topic for the PGM production industry. This paper provides a general overview of the basic principles and theories relevant to the hydrometallurgical recovery of PGMs using ion exchange resins, along with a review and discussion of the most important factors that affect the separation and purification of PGMs present initially in predominantly ionic state in an aqueous hydrochloric acid solution. It is shown that in these acidic chloride solutions, the current system of choice for the leaching of PGMs, the adsorption behavior of the PGM ions onto chelating ion exchange resins is strongly dependent on the anionic PGM chloro-complex species present. In addition, it is revealed that the main factors affecting this complexation are (i) acidity and chloride ion concentration of the contacting aqueous chloride solution, (ii) ageing of the solution, and (iii) temperature of the solution.