新型化合物N-甲基-N-异丙基硫代辛酰胺从盐酸介质中选择性萃取分离钯  

New compound N-methyl-N-isopropyl octanthioamide for palladium selective extraction and separation from HCl media

作　　者：王俊莲 刘璐 徐国栋 王培龙 黄国勇 郁丰善 Jun-lian WANG;Lu LIU;Guo-dong XU;Pei-long WANG;Guo-yong HUANG;Feng-shan YU(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory for High Efficient Mining and Safety of Metal Mines,Ministry of Education,University of Science and Technology Beijing,Beijing 100083,China;Jiangxi Province Han’s Precious Metals Co.,Ltd.,Shangrao 335500,China;State Key Laboratory of Heavy Oil Processing,College of Chemical Engineering,China University of Petroleum-Beijing,Beijing 102249,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]金属矿山高效开采与安全教育部重点实验室,北京100083 [3]江西省汉氏贵金属有限公司,上饶335500 [4]中国石油大学(北京)化工学院重质油国家重点实验室,北京102249

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第5期1609-1618,共10页中国有色金属学报（英文版）

基　　金：the National Key Research and Development Program for Young Scientists,China(No.2021YFC2901100).

摘　　要：为实现从废汽车尾气净化催化剂的浸出液中高效分离钯,合成一种新化合物N-甲基-N-异丙基硫代辛酰胺(TA-813)。通过FT-IR、1H NMR、ESI-MS和元素分析进行表征,研究TA-813对钯的萃取和反萃行为。通过萃取−反萃循环试验评估TA-813的循环使用性能,并用TA-813从废汽车尾气净化催化剂的模拟浸出液中选择性萃取分离钯。结果表明:TA-813对钯萃取速度快、效率高、选择性好;2个TA-813分子萃取1个Pd;有机相中负载的钯可被中性和酸性硫脲高效反萃;TA-813循环使用性能好,经过8次萃取−反萃循环,钯的萃取率没有降低。在废汽车尾气净化催化剂的模拟浸出液中,Pd的浓度远低于杂质离子La、Ce、Mg和Al等,即便如此,TA-813仍能实现钯的选择性高效分离。To seek more efficient extractant for Pd recovery from leaching solution of spent automotive catalysts,a new compound N-methyl-N-isopropyl octanthioamide(TA-813)was synthesized and characterized through FT-IR,1H NMR,ESI-MS and elemental analysis.Its extraction and stripping behaviors for Pd were studied.To evaluate its reusability performance,extraction−stripping cycles were carried out.Finally,TA-813 was applied to separating Pd from simulated leaching solution of spent automotive catalysts.TA-813 shows fast extraction kinetics,high extraction efficiency and specific selectivity for Pd.During extraction two TA-813 molecules coordinate with one Pd.The loaded Pd in the organic phase is efficiently stripped by neutral and acidic thiourea solutions.TA-813 shows no loss in activity after eight extraction−stripping cycles.Even from simulated leaching solution of spent automotive catalysts,in which the concentrations of some purities(La,Ce,Mg,Al)are much higher than that of Pd,Pd is still selectively extracted.

关 键 词：钯 回收 分离 废汽车尾气净化催化剂 硫代酰胺 

分 类 号：TF836[冶金工程—有色金属冶金]