中国稀土学报, 2008, 26(4): 437-442.
酸性磷类萃取剂在硫酸介质中对Y(Ⅲ)的协萃机制研究
张永奇
1,
,
黄小卫
2,
,
王春梅
3,
,
龙志奇
4,
,
张国成
5,
1.北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京,100088;
2.北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京,100088;
3.北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京,100088;
4.北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京,100088;
5.北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京,100088
对HDEHP(H2A2),HEH/EHP(H2B2),Cyanex272(H2L2)萃取剂在硫酸介质中单独以及HDEHP-HEH/EHP和HDEHP-Cyanex272混合萃取剂萃取稀土元素Y(Ⅲ)的机制进行了研究. 研究发现,单独采用HDEHP和HEH/EHP萃取Y(Ⅲ)时,SO2-4参与了反应,造成反应过程中放出的H+个数随萃取剂浓度的变化而变化,对于单独采用Cyanex272萃取Y(Ⅲ)的过程中则是OH-参与了反应. 计算了混合萃取剂萃取Y(Ⅲ)的协萃系数(R),当水相平衡pH=1.2时,HDEHP和HEH/EHP混合萃取体系与HDEHP和Cyanex272混合萃取体系萃取Y(Ⅲ)的R分别为27.68和48.99,并且协萃系数随水相平衡pH的升高而增加. 确定了在HDEHP和HEH/EHP混合萃取体系中的协萃反应并计算了反应的平衡常数及萃合物形成反应的稳定常数,反应机制为阳离子交换反应.
引用：
张永奇,
黄小卫,
王春梅,
龙志奇,
张国成
酸性磷类萃取剂在硫酸介质中对Y(Ⅲ)的协萃机制研究.
中国稀土学报,
2008, 26(4): 437-442.
doi:
参考文献：
[1] Huang Xiaowei,Long Zhiqi,Li Hongwei,Ying Weijuan,Zhang Guocheng,Xue Xiangxin.Development of Rare Earth Hydrometallurgy Technology in China[J].稀土学报（英文版）,2005(01):1-4.
[2] 李建宁,黄小卫,朱兆武,龙志奇,彭新林,崔大立.P204-P507-H2SO4体系萃取稀土元素的研究[J].中国稀土学报,2007(01):55-58.
[3] Nayak D;Lahiri S;Das N R .Synergistic extraction of neodymium and caffier-free promethium by the mixture of HDEHP and PC88A[J].Journal of Radioanalytical and Nuclear Chemistry,1999,240(02):555.
[4] Santhi P B;Reddy M L P;Pamamohan;Ramamohan T R Damodaran A D .Liquid-liquid extraction of yttrium(Ⅲ) with mixtures of organophosphorus extractants:theoretical analysis of extraction behaviour[J].Hydrometallurgy,1991,27:169.
[5] Tsakiridis P E;Gatzini-Leonardou S A .Solvent extraction of aluminium in the presence of cobalt,nickel and magnesium from sulphate solutions by Cyanex272[J].Hydrometallurgy,2005,80(1-2):90.
[6] Sun Xiaobo;Zhao Junmei;Meng Shulan;Li Deqian .Synergistic extraction and separation of yttrium from heavy rare earths using mixture of sec-octylphenoxy acetic acid and Bis(2,4,4-trimethylpentyl) phosphonic acid[J].Analytica Chimica Acta,2005,533:83.
[7] Zhang X E;Li D Q .Extraction of rare earth ions(Ⅲ) with Bis(2,4,4-trimethylpentyl) phosphonic acid[J].Chinese Journal of Applied Chemistry,1993,10(04):72.
[8] Muhammad Idiris Saleh;Md. Fazlul Bari;Bahruddin Saad .Solvent extraction of lanthanum(III) from acidic nitrate-acetato medium by Cyanex 272 in toluene[J].Hydrometallurgy,2002(1):75-84.
[9] Sun Xiaobo;Wang Jinping;Li Deqian;Li Hongfei .Synergistic extraction of rare earths by mixture of Bis(2,4,4-trimethylpentyl)phosphonic acid and sec-nonylphenoxy acetic acid[J].Separation and Purification Technology,2006,50(01):30.
[10] Xiong Ying;Wang Xianglan;Li Deqian .Synergistic extraction and separation of heavy lanthanide by mixtures of Bis(1,4,4-trimethylpentyl)phosphinex Acid and 2-ethyltexyl phosphonic acid mono-2-ethythexyl ester[J].Separation Science and Technology,2005,40:2325.
[11] Darvishia D;Haghshenasa D F;Keshavarz Alamdarib E;Sadrnezhaada T S K Halali M .Synergistic effect of Cyanex 272 and Cyanex 302 on separation of cobalt and nickel by D2EHPA[J].Hydrometallurgy,2005,77(3-4):227.
[12] 徐光宪.核燃料萃取的化学（Ⅰ）螯合与中性络合协同萃取[J].原子能科学技术,1963(07):487.
材料期刊网