摘要
The synergistic extraction of Cd（Ⅱ）with primary amine N-1923 and neutralorganophosphorus reagents（TBP,DBBP,B）from hydrochloric acid has been investigated atμ=0.5,t=25℃.The compositions of the synergistic extraction complexes and the mechanismof the synergistic extraction have been determined by the methods of slope and constant mole.The synergistic extraction complexes with composition（RNH<sub>3</sub>Cl）<sub>2</sub>·CdCl<sub>2</sub>·B have beendemonstrated.The synergistic extraction reactions and additional reaction of Cd（Ⅱ）havebeen proposed as follows:CdCl<sub>2</sub>+2RNH<sub>3</sub>Cl<sub>o</sub>+B<sub>o</sub>（RNH<sub>3</sub>Cl）<sub>2</sub>·CdCl<sub>2</sub>·B<sub>o</sub>（RNH<sub>3</sub>Cl）<sub>3</sub>·CdCl<sub>(</sub>2（o）+B<sub>o</sub>（RNH<sub>3</sub>Cl）<sub>2</sub>·CdCl<sub>2</sub>·B<sub>o</sub>+RNH<sub>3</sub>Cl<sub>o</sub>In addition,the equilibrium constants and the thermodynamic functions of the synergistic ex-traction reactions have been calculated.The IR and NMR spectra of the synergistic ext-ac-tion complexes of Cd（Ⅱ）have been studied as well.
The synergistic extraction of Cd(Ⅱ)with primary amine N-1923 and neutral organophosphorus reagents(TBP,DBBP,B)from hydrochloric acid has been investigated at μ=0.5,t=25℃.The compositions of the synergistic extraction complexes and the mechanism of the synergistic extraction have been determined by the methods of slope and constant mole. The synergistic extraction complexes with composition(RNH_3Cl)_2·CdCl_2·B have been demonstrated.The synergistic extraction reactions and additional reaction of Cd(Ⅱ)have been proposed as follows: CdCl_2+2RNH_3Cl_(o)+B_(o)(RNH_3Cl)_2·CdCl_2·B_(o) (RNH_3Cl)_3·CdCl_(2(o)+B_(o)(RNH_3Cl)_2·CdCl_2·B_(o)+RNH_3Cl_(o) In addition,the equilibrium constants and the thermodynamic functions of the synergistic ex- traction reactions have been calculated.The IR and NMR spectra of the synergistic ext-ac- tion complexes of Cd(Ⅱ)have been studied as well.
