论文部分内容阅读
A series of ammonium-bifunctionalized ionic liquid extractants(ammonium-Bif-ILEs) combined with a number of anions, including carboxylic acids and 1,3-diketonates, have been prepared and studied in this report. Their extraction behavior and properties toward rare earth ions(REs(Ⅲ)) are systematically investigated in chloride media as a function of important parameters such as aqueous phase p H, salting-out agent concentrations, and extraction temperature. The separation performance of ammonium-Bif-ILEs toward REs(Ⅲ) are systematically discussed. The results demonstrate that ammonium-Bif-ILEs have a synergistic effect between the cation and anions in separation of REs(Ⅲ). The influences of different anions on separation factor(b) values are further studied. By comparison, ammonium-Bif-ILEs containing 1,3-diketonates have more potential applications in La(Ⅲ)/RE(Ⅲ) separation than those containing carboxylic acids.
A series of ammonium-bifunctionalized ionic liquid extractants (ammonium-Bif-ILEs) combined with a number of anions, including carboxylic acids and 1,3-diketonates, have been prepared and studied in this report. Their extraction behavior and properties toward rare earth ions (REs (III)) are systematically investigated in chloride media as a function of important parameters such as aqueous phase p H, salting-out agent concentrations, and extraction temperature. The separation performance of ammonium-Bif-ILEs toward REs are systematically discussed. The results demonstrate that ammonium-Bif-ILEs have a synergistic effect between the cation and anions in separation of REs (III). The influences of different anions on separation factor (b) values are further studied. By comparison, ammonium -Bif-ILEs containing 1,3-diketonates have more potential applications in La (III) / RE (III) separation than those containing carboxylic acids.