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首页> 外文期刊>Hydrometallurgy >Extraction and separation of platinum, palladium and rhodium using Cyanex 923 and their recovery from real samples
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Extraction and separation of platinum, palladium and rhodium using Cyanex 923 and their recovery from real samples

机译：使用Cyanex 923萃取和分离铂，钯和铑以及从真实样品中回收铂，钯和铑

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摘要

Platinum group metals find extensive use in automobile catalysts, space materials and cancer therapy. Their nat ural resources are limited thus their recovery from the secondary sector has assumed a great significance. Liquid-liquid extraction provides an effective methodology for the said purpose. The present paper discusses the extrac tion behavior of platinum(IV), rhodium(III) and palladium(II) from HC1, H_2S0_4 and HNO_3 (0.10-6.0 mol L~(-1)) media by toluene solution of Cyanex 923. Detailed studies have been conducted by varying the equilibration time, temperature, diluent and concentration of extractant An assessment of the loading capacity, regeneration power and stability of extractant has been made. The extraction behavior of associated metals namely gold, sil ver, iron, nickel, cobalt, chromium, copper and aluminum has been investigated and the conditions for the binary separations involving platinum metals have been optimized. The stoichiometric ratio of the extracting species for platinum and palladium has been worked out. Based on the extraction data platinum, palladium and rhodium have been recovered from some spent commercial materials.
机译：铂族金属广泛用于汽车催化剂，航天材料和癌症治疗。他们的自然资源是有限的，因此从第二产业的恢复具有重要意义。液-液萃取为所述目的提供了有效的方法。本文讨论了用Cyanex 923的甲苯溶液从HC1，H_2SO_4和HNO_3（0.10-6.0 mol L〜（-1））介质中萃取铂（IV），铑（III）和钯（II）的行为。详细通过改变平衡时间，温度，稀释剂和萃取剂的浓度进行了研究。评估了萃取剂的负载量，再生能力和稳定性。研究了相关金属（金，银，铁，镍，钴，铬，铜和铝）的萃取行为，并优化了涉及铂金属的二元分离条件。已经计算出铂和钯的萃取物种的化学计量比。根据提取数据，已从一些废商业材料中回收了铂，钯和铑。

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