Extraction and separation of palladium(II), platinum(IV), gold(III) and rhodium(III) using piperidine-based extractants
Extraction and separation of palladium(II), platinum(IV), gold(III) and rhodium(III) using piperidine-based extractants
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DOI：
10.1016/j.hydromet.2017.12.019
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发表时间：
2018-01-01
期刊：
影响因子：
4.7
通讯作者：
Wieczorek, Dania
中科院分区：
文献类型：
--
作者：
Cieszynska, Anna;Wieczorek, Dania
研究了N-癸基哌啶（P-C_（10））、N-十二烷基哌啶（P-C_（12））、N-十四烷基哌啶（P-C_（14））和N-十六烷基哌啶（P-C_（16））从盐酸介质中萃取钯（II）的性能。P-C_（12）、P-C_（14）和P-C_（16）在甲苯中能有效地从0.1M HCl溶液中萃取90%以上的钯（II），10 min后达到萃取平衡。在所检查的反萃取溶液中，最有效的是0.5 M氨水溶液和0.1 M硫脲的1 M HCl溶液。从负载有机相（P-C12）反萃的钯（II）的百分比达到接近100%。还研究了合成的N-十二烷基哌啶（P-C_（12））萃取钯（II）对铑（III）、铂（IV）和金（III）的选择性。用P-C_（12）从0.1和3 M HCl中萃取钯（II）的选择性最好。钯（II）与铂（IV）或金（III）的分离不是那么有效，它取决于水溶液的酸度。N-十二烷基哌啶对贵金属离子的萃取能力也表现为从0.1 M HCl中萃取Au（III）> Pd（II）（类似于Pt（IV）> > Rh（III）），从3 M HCl中萃取Au（III）> Pt（IV）> Pd（II）> > Rh（III）。钯（II）、铂（IV）和金（III）可以通过从负载有机相中的反萃取成功地分离。
Extraction of palladium(II) from hydrochloric acid media with novel piperidine-based extractants N-decylpiperidine (P-C10), N-dodecylpiperidine (P-C12), N-tetradecylpiperidine (P-C14) and N-hexadecylpiperidine (P-C16) has been investigated. Over 90% of palladium(II) from 0.1 M HCl solution can be effectively extracted with P-C12, P-C14 and P-C16 in toluene and the extraction equilibrium is achieved after 10 min. Increase in HCl concentration has a negative effect on the effectiveness of palladium(II) extraction. From among the examined stripping solutions the most effective are 0.5 M aqueous solution of ammonia and 0.1 M thiourea in 1 M HCl. The percentage of palladium(II) stripped from loaded organic phase (P-C12) reached nearly 100%. Also the selectivity of palladium(II) extraction over rhodium(III), platinum(IV) and gold(III) with the synthesized N-dodecylpiperidine (P-C12) has been investigated. The selectivity of extraction of palladium(II) over rhodium(III) from 0.1 and 3 M HCl with P-C12 was the best. Separation of palladium(II) from platinum(IV) or gold(III) is not so effective and it depends upon the acidity of aqueous solution. N-dodecylpiperidine also shows the extraction ability towards examined noble metal ions in the following order Au(III) > Pd(II) similar to Pt(IV) > > Rh(III) from 0.1 M HCl and Au(III) > Pt(IV) > Pd(II) > > Rh(III) from 3 M HCl. Palladium(II), platinum(IV) and gold (III) can be successfully separated through stripping from the loaded organic phase.