铀矿冶2025，Vol.44Issue(3)：41-49,9.DOI:10.13426/j.cnki.yky.2024.12.10
Cextrant 230与Cyanex 923二元体系萃取钍的传质动力学研究
Mass Transfer Kinetics of Thorium Extraction with Mixtures of Cextrant 230 and Cyanex 923
摘要
Abstract
The kinetics of thorium extraction from hydrochloric acid medium by a binary mixed system of di(2-ethylhexyl)(2-ethylhexyl)aminomethylphosphonate(Cextrant 230)and trialkylphosphine ox-ide(Cyanex 923)was investigated using the laminar flow constant interfacial cell method.For com-parison,the kinetics of thorium extraction by the Cextrant 230 single system was also studied.Sys-tematic investigations were conducted on the effects of stirring rate,temperature,specific interfacial area,extractant concentration,acidity,and chloride ion concentration on the extraction rate.The re-sults show that the extraction regime is deduced to be chemical reaction-controlled for the sole Cex-trant 230 system and diffusion-controlled for the mixture system,respectively,and the extraction re-action occurring at the bulk phase would be the rate-determining step.The thorium extraction rate is barely affected with temperature variations in the sole Cextrant 230 system,but increased in the mix-ture system,with an activation energy of 14.74 kJ/mol.The concentration of chloride and extractants linearly related to the extraction rate indicates that the extraction of Th4+both in the sole Cextrant 230 system and mixture system is a pseudo first-order reversible reaction.关键词
钍/Cextrant 230/Cyanex 923/二元体系/萃取动力学/氯化介质Key words
thorium/Cextrant 230/Cyanex 923/binary system/extraction kinetics/chloride medium分类
能源科技引用本文复制引用
王慧,高迪,黄亚斌,况王强,邝圣庭,廖伍平..Cextrant 230与Cyanex 923二元体系萃取钍的传质动力学研究[J].铀矿冶,2025,44(3):41-49,9.基金项目
国家重点研发计划项目(2022YFC2905201) （2022YFC2905201）
中国科协青年人才托举工程项目(2022NQRC001) （2022NQRC001）
江西省重点研发计划项目(20243BBG71021,S20251609) （20243BBG71021,S20251609）
江西省"双千计划"(JXSQ2020101005) （JXSQ2020101005）
赣州市科技计划项目(2022CXRC9671) （2022CXRC9671）
赣州市"苏区之光"高层次创新团队项目(GZSQZG202301018). （GZSQZG202301018）
