Recovery of platinum, palladium and rhodium from acidic chloride leach solution using ion exchange resins
Recovery of platinum, palladium and rhodium from acidic chloride leach solution using ion exchange resins
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DOI：
10.1016/j.hydromet.2014.12.006
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发表时间：
2015-02-01
期刊：
影响因子：
4.7
通讯作者：
Li, Dan
中科院分区：
文献类型：
--
作者：
Nikoloski, Aleksandar N.;Ang, Kwang-Loon;Li, Dan
本研究的目的是研究具有不同物理化学特性和官能团的所选离子交换剂的适用性和性能，以同时回收废汽车催化剂浸出产生的氯化物溶液中存在的三种不同的铂族元素（PGE）：铂（IV）、钯（II）和铑（III）。测试的离子交换剂包括具有季铵官能团的树脂(Lewatit MonoPlus (M +) MP 600)、具有聚胺官能团的树脂(Purolite S985)和具有硫脲官能团的树脂(XUS 43600.00)。该研究还重点关注使用不同的洗脱液系统可实现的负载树脂解吸。浸出液是氯饱和的，含有2.35mol/L盐酸、浓度为0.13mmol/L的铂和钯、以及浓度为0.03mmol/L的铑。结果发现，在所研究的树脂中，XUS 43600.00 对氯化铂 (IV) 和氯化钯 (II) 络合物表现出最佳的吸附性能，但所有三种树脂对氯化铑 (III) 络合物的亲和力较弱。发现吸附动力学服从Ho准二级表达式。对于 Lewatit MonoPlus (M+) MP 600 和 Purolite S985，Freundlich 等温线最能描述吸附，而对于 XUS 43600.00，Langmuir 等温线更合适。使用四种不同的洗脱剂检查 PGE 的解吸：硫氰酸钠 (2 mol/L)、盐酸 (2 mol/L)、硫脲 (1 mol/L) 的盐酸 (2 mol/L) 溶液和硫脲 (1 mol/L) 的氢氧化钠 (2 mol/L) 溶液。结果表明，酸性硫脲可以充分洗脱铂和钯，但所有洗脱液都难以解吸铑。 (C) 2014 Elsevier B.V. 保留所有权利。
The objective of this study was to investigate the applicability and performance of the selected ion exchangers with different physicochemical characteristics and functional groups to simultaneously recover three different platinum group elements (PGE), platinum(IV), palladium(II) and rhodium(III), present in a chloride solution produced by the leaching of spent automotive catalysts. The tested ion exchangers included a resin with a quaternary ammonium functional group (Lewatit MonoPlus (M +) MP 600), a resin with a polyamine functional group (Purolite S985) and a resin with a thiouronium functional group (XUS 43600.00). The study also focused on the achievable desorption from the loaded resins using different eluent systems. The leach solution was chlorine-saturated and contained 2.35 mol/L hydrochloric acid, platinum and palladium in concentrations of 0.13 mmol/L, and rhodium 0.03 mmol/L. It was found that XUS 43600.00 showed the best adsorption performance for platinum(IV) and palladium(II) chloride complexes among the investigated resins, but weak affinity for rhodium(III) chloride complexes was observed for all three resins. The adsorption kinetics were found to obey the Ho pseudo-second order expression. For Lewatit MonoPlus (M+) MP 600 and Purolite S985 the adsorption was best described by the Freundlich isotherm, while for XUS 43600.00 the Langmuir isotherm was more apt. Desorption of the PGE was examined using four different elution agents: sodium thiocyanate (2 mol/L), hydrochloric acid (2 mol/L), thiourea (1 mol/L) in hydrochloric acid (2 mol/L), and thiourea (1 mol/L) in sodium hydroxide (2 mol/L). The results showed that platinum and palladium can be fully eluted with the acidic thiourea but desorption of rhodium proved difficult with all the eluents. (C) 2014 Elsevier B.V. All rights reserved.