State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Remin Street 5625, Changchun 130022, PR China.
J Hazard Mater. 2010 Oct 15;182(1-3):447-52. doi: 10.1016/j.jhazmat.2010.06.052. Epub 2010 Jun 19.
The inner synergistic extraction of [tricaprylmethylammonium][sec-octylphenoxy acetate] ([A336][CA-12]) is studied for cobalt and nickel separation. Distribution ratios of [A336][CA-12] for Co(2+) or Ni(2+) are by far higher than those of tricaprylmethylammonium sulfate (A336SO(4)), sec-octylphenoxy acetic acid (CA-12), mixture of A336SO(4) and CA-12 at the acidities from 1x10(-5) mol L(-1) to 1x10(-3) mol L(-1). The synergy coefficients of [A336][CA-12] for Co(2+) are higher than the synergy coefficients of [A336][CA-12] for Ni(2+), which can be used for the Co(2+) and Ni(2+) separation. Some thermodynamic properties of the inner synergistic extraction using [A336][CA-12] for Co(2+) and Ni(2+) are also studied, such as influence of temperature, thermodynamic functions, extraction mechanism, separation factors and stripping properties.
[三辛基甲基铵][仲辛基苯氧基乙酸酯]（[A336][CA-12]）的协同萃取用于钴镍分离的研究。在酸度为 1x10(-5) mol L(-1)至 1x10(-3) mol L(-1)时，[A336][CA-12]对 Co(2+)或 Ni(2+)的分配比远高于三辛基甲基硫酸铵(A336SO(4))、仲辛基苯氧基乙酸（CA-12）和A336SO(4)与 CA-12 的混合物。[A336][CA-12]对 Co(2+)的协同系数高于对 Ni(2+)的协同系数，可用于 Co(2+)和 Ni(2+)的分离。还研究了[A336][CA-12]用于 Co(2+)和 Ni(2+)协同萃取的一些热力学性质，如温度、热力学函数、萃取机制、分离因子和反萃性质的影响。
