Palladium(II) Extraction by Pyridinecarboxylic Acid Esters
Palladium(II) Extraction by Pyridinecarboxylic Acid Esters
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DOI：
10.1023/a:1006760316499
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发表时间：
2000-12
影响因子：
1.6
通讯作者：
M. Wiśniewski
中科院分区：
文献类型：
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作者：
M. Wiśniewski
用商业萃取剂Acorga CLX-50和模型化合物吡啶-3，5-二甲酸二（2-乙基己基）酯和吡啶-3-甲酸（2-乙基己基）酯的甲苯溶液从盐酸水溶液中萃取钯（II）。在含钯（II）离子的体系中，在0.5M氯化钠存在下，在3.0、0.1和0.1M HCl中，在0.1-6.0M氯化锂存在下，在0.1M HCl中，在0.1-3.5M硝酸钠存在下，进行了萃取速率和平衡的研究。所研究的萃取剂可以有效地从盐酸和硝酸水溶液中萃取钯（II）。萃取缓慢，2小时后达到平衡。在3.5M硝酸钠存在下，从0.1M HCl溶液中观察到钯（II）的最佳萃取。还观察到钯（II）自发转移到甲苯相中而没有任何相混合。
The commercial extractant Acorga CLX-50 and model individual di-2-ethylhexyl pyridine-3,5-dicarboxylate and 2-ethylhexyl pyridine-3-carboxylate in toluene were used for palladium(II) extraction from aqueous HCl solutions. The studies of extraction rate and equilibrium were carried out in systems containing palladium(II) ions in 3.0, 0.1, and 0.1M HCl in the presence of 0.5M sodium chloride and in 0.1M HCl in the presence of 0.1–6.0M lithium chloride and in 0.1M HCl in the presence 0.1–3.5M sodium nitrate. The examined extractants can efficiently extract palladium(II) from aqueous hydrochloric acid and nitrate solutions. The extraction is slow and equilibrium is obtained after 2 hours. The best extraction of palladium(II) is observed from 0.1M HCl solution in the presence of 3.5M sodium nitrate. A spontaneous transfer of palladium(II) to the toluene phase without any phase mixing is also observed.