Ion exchange equilibria in nonaqueous and mixed solvents on the cationic exchanger amberlite IR-120
Ion exchange equilibria in nonaqueous and mixed solvents on the cationic exchanger amberlite IR-120
复制标题
DOI：
10.1021/je000175o
复制
发表时间：
2001-01-01
期刊：
影响因子：
--
通讯作者：
Rodríguez, JF
中科院分区：
文献类型：
--
作者：
de Lucas, A;Valverde, JL;Rodríguez, JF
测定了313 K时AmberliteIR-120（强酸性树脂）在纯甲醇、乙醇、异丙醇、正丁醇和正戊醇中以及在甲醇+水、乙醇+水、异丙醇+水、正丁醇+甲醇和正戊醇+甲醇中的Na ~+/K ~+平衡交换等温线。实验平衡数据已令人满意的关联使用均匀质量作用定律模型（LAM）。该模型假设溶液和固相的非理想行为。Wilson和Debye-Huckel方程分别用于计算固相和液相的活度系数。已经观察到，溶剂或混合物的介电常数不仅对树脂的有用容量而且对系统的平衡行为产生强烈影响。
Na+/K+ equilibrium ion exchange isotherms on Amberlite IR-120 (known as a strong acid resin) in pure methanol, ethanol, 2-propanol, 1-butanol, and 1-penthanol and in mixtures of methanol + water, ethanol + water, 2-propanol + water, 1-butanol + methanol, and 1-penthanol + methanol at 313 K have been determined. Experimental equilibrium data have been satisfactorily correlated using the homogeneous mass action law model (LAM). This model assumes nonideal behavior for both the solution and the solid phase. Wilson and Debye-Huckel equations have been used to calculate activity coefficients in the solid and liquid phase, respectively. It has been observed that the dielectric constant of the solvent or the mixture exerts a strong influence not only on the useful capacity of the resin but also on the equilibrium behavior of the system.