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在盐酸介质中用二(2-乙基已基)单硫代磷酸萃取钯,其萃取性能随着盐酸浓度增高而降低。用连续变换法、斜率法和饱和法测得萃合物的组成为Pd_2L_3Cl,IR和H’NMR光谱进一步论证了其反应机理为阳离子交换机理;P=S键中的S原子与钯形成配位键。萃取反应如下: 2H_2PdCl_4+3HL(?)H_2Pd_2L_3Cl_3+5HCl
The extraction of palladium with di (2-ethylhexyl) monothiophosphoric acid in hydrochloric acid medium decreased its extraction performance as the concentration of hydrochloric acid increased. The results show that the reaction mechanism is cation exchange mechanism by Pd_2L_3Cl, IR and H’NMR spectra. The S atom in P = S bond forms with Pd key. Extraction reaction is as follows: 2H_2PdCl_4 + 3HL (?) H_2Pd_2L_3Cl_3 + 5HCl