dot 10. 3969/j. issn. 1007-7545. 2022. 04. 010
N263-HSCN 体系萃取错错的动力学
董攀飞 , 徐志高 , 吴明 , 沙傲阳 , 何正艳 , 瞿军
(中南民族大学资源与环境学院 , 催化转化与能源材料化学教育部重点实验室 ,
资源转化与污染物控制国家民委重点实验室 , 催化材料科学湖北省重点实验室 , 武汉 430074)
摘要:采用恒界面池法研究了 N263-HSCN 体系萃取错和钳的动力学 , 考察界面积 、 萃取槽搅拌速度 、 温
度对萃取错和错的影响,从而确定萃取动力学类型 。 结果表明 , 当搅拌速度小于 130 r/min 时 , 萃取过程
由扩散反应控制 , 错错的萃取速率常数随搅拌速度的增加而增大 ; 当搅拌速度在 130 170 r/tnin 时 , 萃
取过程由化学反应控制 , 错和钳的萃取速率常数随搅拌速度的增加基本保持不变 。 随着界面积的增加
和温度的提高 , 错和钳的萃取速率常数均增加 , 其表观活化能分别为 42. 06 kj/mol 和 31.77 kj/mol, 说
明该萃取过程为相界面处的化学反应控制过程 。 计算出错和钳萃取的熔变分别为 39.59 kj/mol 和
29. 30 kj/mol,(R) 变分别为 一 147 53 J/(mol o K) 和 一 174. 38 J/(mol o K), 在 298. 15 K 时吉布斯自由能
变分别为 83. 57 kj/mol 和 81. 29 kj/mol o
关键词 : 恒界面法;萃取动力学 N263-HSCN 体系 Zr Hf
中图分类号: TF841.4 文献标志码 : A 文章编号 1007-7545(2022)04-0067-06
Kinetics of Extraction of Zirconium and Hafnium with N263-HSCN System
DONG Pan-fei , XU Zhi-gao , WU Ming, SHA Ao-yang , HE Zheng-yan , QU Jun
(Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education , Key Laboratory of
Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, Hubei Key Laboratory of Catalysis and Materials
Science , College of Resources and Environmental Science , South-Central Minzu University, Wuhan 430074, China)
Abstract : Extraction kinetics of zirconium and hafnium extracted by N263-HSCN system was studied by -
constant Lewis cell technique. Effects of stirring speed, interfacial area and temperature of extraction tank
on extraction of zirconium and hafnium were explored to determine the type of extraction kinetics. The
results show that when stirring speed is less than 130 r/min, the extraction rate constant of zirconium and
hafnium rises with the increase of stirring speed > and the extraction process is controlled by diffusion reaction
When stirring speed is within 130 — 170 r/min, the extraction rate constants of zirconium and hafnium remains
basically stable with the increase of stirring speed, and the extraction process is controlled by chemical reaction. With
the increase of interfacial area and temperature , the extraction rate constants of zirconium and hafnium rise, the
apparent activation energies of zirconium and hafnium extraction are 42. 06 kJ/mol and 31. 77 kJ/mol respectively,
indicating that the extraction process is controlled by chemical reaction process at the phase interface. The enthalpy
changes of zirconium and hafnium extraction are 39. 59 kJ/mol and 29 30 kJ/mol respectively. The entropy changes
收稿日期 =2021-11-07
基金项目 : 国家自然科学基金资助项目 ( 51774344,52104289) 湖北省自然科学基金项目 ( 2020CFB165) 武汉市应用基础前沿
项目 ( 2019020701011449)
作者简介: 董攀飞 (1996-), 男 , 硕士研究生;通信作者: 徐志高 (1975-), 男 , 博士 , 教授