摘要
为开发N263-HSCN锆铪分离体系负载有机相的反萃剂和反萃工艺参数,分别采用HCl、H_(2)SO_(4)、HNO_(3)、(NH_(4))_(2)CO_(3)、C_(2)H_(2)O_(4)和C_(4)H_(6)O_(6)等试剂作为反萃剂,研究了它们对N263-HSCN体系负载有机相的反萃行为,利用控制变量因素法探索了反萃剂的浓度、有机相和反萃水相的体积比对锆和铪反萃率和分离系数的影响规律。结果表明:反萃剂对锆的反萃率的大小顺序为C_(2)H_(2)O_(4)>H_(2)SO_(4)>C_(4)H_(6)O_(6)>(NH_(4))_(2)CO_(3)>HCl>HNO_(3),对铪的反萃率的大小顺序为H_(2)SO_(4)>(NH_(4))_(2)CO_(3)>C_(2)H_(2)O_(4)>C_(4)H_(6)O_(6)>HCl>HNO_(3)。先采用3.0 mol/L的H_(2)SO_(4)作反萃剂,相比(O/A)为4/1对负载有机相进行反萃,锆和铪最大的反萃率分别为58.87%和4.60%,分离系数可达12.81,反萃后再选用6.0 mol/L的H_(2)SO_(4)对铪进行洗脱,铪的洗脱率为92.39%,为开发反萃工艺提供理论指导。
To develop the stripping agents and stripping process parameters of loaded organic phase in N263-HSCN separation system of zirconium and hafnium,HCl,H_(2)SO_(4),HNO_(3),(NH_(4))_(2)CO_(3),C_(2)H_(2)O_(4) and C_(4)H_(6)O_(6) were used as stripping agents respectively,and their stripping behavior was studied.The effects of the concentration of stripping agents and the volume ratio of organic phase and stripping water phase on the stripping yields and separation factor of zirconium and hafnium were investigated with the control variable factor method.The results show that the orders of stripping yields of zirconium and hafnium by stripping agents are C_(2)H_(2)O_(4)>H_(2)SO_(4)>C_(4)H_(6)O_(6)>(NH_(4))_(2)CO_(3)>HCl>HNO_(3) and H_(2)SO_(4)>(NH_(4))_(2)CO_(3)>C_(2)H_(2)O_(4)>C_(4)H_(6)O_(6)>HCl>HNO_(3) respectively.When 3.0 mol/L H_(2)SO_(4) is used as stripping agent,and the loaded organic phase is stripped at the phase volume ratio(O/A)of 4/1,the maximum stripping yields of zirconium and hafnium are 58.87%and 4.60%respectively,and the separation factor reaches 12.81.After stripping,6.0 mol/L H_(2)SO_(4) is used to elute hafnium,and its elution yield is 92.39%,which provides theoretical guidance for the development of stripping process.
作者
董攀飞
徐志高
吴明
沙傲阳
何正艳
瞿军
DONG Panfei;XU Zhigao;WU Ming;SHA Aoyang;HE Zhengyan;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 University for Nationalities,Wuhan 430074,China)
出处
《武汉工程大学学报》
CAS
2022年第1期31-35,共5页
Journal of Wuhan Institute of Technology
基金
国家自然科学基金(51774344,52104289)
湖北省自然科学基金(2020CFB165)
武汉市应用基础前沿项目(2019020701011449)。
关键词
锆
铪
负载有机相
反萃取
zirconium
hafnium
loaded organic phase
stripping
