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本文采用萃取柱色层法进行铂、钯、铑、铱相互分离的试验研究工作。在固定相为N_(263)-聚三氟氯乙烯的色层柱上进行了一系列淋洗条件试验。试验结果表明在一定盐酸浓度时,Rh~(3+)不被固定相吸附,直接流出柱外,被吸附在柱上的Pt~(4+)、Pd~(2+)、Ir~(4+)可用一定浓度的抗坏血酸酸性溶液还原淋洗Ir~(4+),再用不同浓度的硫脲酸性溶液分别淋洗Pd~(2+)和Pt~(4+)。使在含Pt、Pd、Rh、Ir混合物的盐酸溶液中实现了此四元素的相互分离。并曾利用此法从含少量Pt、Pd、Ir的富铑液中分离提取铑,制得了高纯铑粉,铑的纯度≥99.95％。
In this paper, the extraction column chromatography method for platinum, palladium, rhodium, iridium mutual separation of experimental research work. A series of elution conditions were tested on a chromatographic column with stationary phase N_ (263) -PCR. The results show that Rh ~ (3 +) is not adsorbed by the stationary phase at a certain concentration of hydrochloric acid and flows out of the column directly and is adsorbed on the Pt ~ (4 +), Pd ~ (2 +), Ir ~ (4 +) Can be rinsed with a certain concentration of ascorbic acid solution rinsed Ir ~ (4 +), and then different concentrations of thiourea acid solution were rinsed Pd ~ (2+) and Pt ~ (4 +). The four elements are separated from each other in a hydrochloric acid solution containing a mixture of Pt, Pd, Rh and Ir. And this method has been used from a small amount of Pt, Pd, Ir rhodium-rich liquid separation and extraction of rhodium, high purity rhodium powder, rhodium purity ≥ 99.95%.