D296树脂吸附分离锆铪试验研究

Separation of Hafnium From Zirconium by D296 Ion-exchange Resin

研究了用D296树脂从硫酸体系中吸附锆、铪,考察了吸附时间、初始料液质量浓度、温度、硫酸浓度对树脂吸附锆、铪及锆、铪分离系数的影响及吸附反应动力学。结果表明:溶液中锆离子质量浓度为120g/L、温度1℃、硫酸浓度1.6mol/L条件下,D296树脂对锆、铪的静态吸附分离系数最大,为1.19。动力学研究结果表明,D296树脂吸附锆离子的控制步骤为液膜扩散,D296树脂吸附锆离子的活化能E=158.639kJ/mol。

Adsorption separation of hafnium from zirconium in sulfuric acid medium by D296 ion- exchange resin was researched. The effects of adsorption time, initial concentrate of zirconium and hafnium in solution, temperature and sulfuric acid concentrate on separation coefficient of zirconium and hafnium were examined, and the reaction dynamics was also studied. The results show that under the conditions of zirconium ion mass concentrate of 120 g/L, temperature of 1 ~C, sulfuric acid concentrate of 1. 6 mol/L, the static adsorption separation coefficient of zirconium and hafnium is maximum（1.19）. Dynamics research results show that the main controlling step for D296 adsorption zirconium ion is liquid membrane diffusion. The adsorption activation energy of D296 for zirconium ion is 158. 639 kJ/mol.