强碱性阴离子交换树脂吸附锆、铪分配系数研究  

Study on the adsorption distribution coefficient of zirconium and hafnium by anion ion exchange resin

作　　者：黎志万[1] 刘小龙[1] 张嘉[1] 任萌[1] 李佳[1] 刘锦洪[1] 

机构地区：[1]中国核动力研究设计院核燃料元件与材料研究所,四川成都610213

出　　处：《铀矿冶》2016年第4期288-292,共5页Uranium Mining and Metallurgy

摘　　要：通过静态试验法,测试了201×7、D290、D296 3种离子交换树脂吸附硫酸锆（铪）溶液中的锆、铪的两相分配系数Kd（Zr）/Kd（Hf）的比值。试验证明D296大孔阴离子离子交换树脂吸附锆、铪的Kd（Zr）/Kd（Hf）的值最好,好于孔径较小的D290大孔阴离子交换树脂,即离子交换树脂的孔结构对两相分配系数比值有较为显著的影响。进一步研究了硫酸锆（铪）溶液中加入硫酸的量和溶液的温度对D296大孔阴离子交换树脂吸附锆、铪的Kd（Zr）、Kd（Hf）和二者比值的影响。研究表明,控制硫酸锆（铪）溶液的吸附温度在1~3℃和硫酸锆（铪）溶液中c（H2SO4）为1.6mol/L条件下,D296树脂对铪的吸附量最小,Kd（Zr）/Kd（Hf）的值达到最佳。研究结果表明控制D296树脂吸附硫酸锆（铪）溶液中的Kd（Hf）到较小的值,即Kd（Zr）/Kd（Hf）的值最大,有利于后续通过进一步淋洗试验分离得到核纯级的锆和铪。Through the static experiment method , the experiment on measurement the value of Kd（Zr）/Xd（Hf ） with 201 X 7, D 290, D 296 ion exchange resin in zirconium（Hf ） sulfate solution was carried out. The experiment results show that value of Kd （Z r） /Kd （Hf ） of D 296 macroporous anion exchange resin is larger than that of the D 290 resin adsorption, a nd is the best of the three resins, b e-cause different pore structure of ion exchange resins has the more significant influence on two-phase distribution ratio of Zr a nd Hf . The paper further studies the effects of sulphuric acid an d the solution temperature on the Kd（Z r） a nd Kd（Hf ） influence as well as D 290 porous anion exchange resin adsorp-tion value of Kd （Zr） /Kd （ Hf ） influence. The results indicate that the value of Xd （Z r）/Xd （ Hf ） of D 296 is the best when the temperature of is 1~3 ℃ a nd the c（H2SO4） sulfuric acid is 1. 6 mol/L of Zirconium（Hf ） sulfate solution. And by the experimental results infer that the value of Kd（ Hf ） by D 290 porous anion exchange resin adsorption value is controlled smaller in Hf sulfate solution, there-fore, the value of Kd （Z r） /Kd （Hf ） reaches the maximum . As the results, the value is benefit to the late separation process. Therefore, nuclear grade zirconium and nuclear grade hafnium can be obtained through the further development of elution experiments.

关 键 词：锆 铪 温度 分配系数 离子交换树脂 分离 

分 类 号：TF841.4[冶金工程—有色金属冶金]