Synergistic extraction of heavy rare earths by mixture of α-aminophosphonic acid HEHAMP and HEHEHP
来源期刊：Journal of Rare Earths2019年第4期
论文作者：Qi Zhao Yanling Li Shengting Kuang Zhifeng Zhang Xue Bian Wuping Liao
文章页码：422 - 428
摘 要：Synergistic extraction of heavy rare earths（REs） were investigated in chloride media by the mixture of（2-ethylhexylamino）methyl phosphonic acid mono-2-ethylhexyl ester（HEHAMP） and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester（HEHEHP）. The maximum synergistic enhancement coefficients（R） of Lu, Yb, Tm, Er, Y and Ho are 2.89, 2.76, 2.54, 2.14, 2.14 and 2.06, respectively, when the mole fraction XHEHAMP is 0.5. The synergistic separation factors of the heavy REs are obtained(βY/Ho=1.31,βEr/Y= 1.61,βTm/Er= 1.78, βYb/Tm= 1.76, βLu/Yb = 1.20). The extracted complex is determined to be RE[H（EHAMP）2][H（EHEHP）2]2 by the slope analysis method. The loading capacities of the mixtures consisting of 15% HEHAMP and 15% HEHEHP for Y and Lu are about 26.59 g/L（Yb2 O3） and 27.25 g/L（Lu2 O3）,respectively.
Qi Zhao1,2，Yanling Li2，Shengting Kuang2，Zhifeng Zhang2，Xue Bian1，Wuping Liao2
1. School of Metallurgy, Northeastern University2. State Key Laboratory of Rare Earth Resource Utilization, ERC for the Separation and Purification of REs and Thorium, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
摘 要：Synergistic extraction of heavy rare earths（REs） were investigated in chloride media by the mixture of（2-ethylhexylamino）methyl phosphonic acid mono-2-ethylhexyl ester（HEHAMP） and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester（HEHEHP）. The maximum synergistic enhancement coefficients（R） of Lu, Yb, Tm, Er, Y and Ho are 2.89, 2.76, 2.54, 2.14, 2.14 and 2.06, respectively, when the mole fraction XHEHAMP is 0.5. The synergistic separation factors of the heavy REs are obtained(βY/Ho=1.31,βEr/Y= 1.61,βTm/Er= 1.78, βYb/Tm= 1.76, βLu/Yb = 1.20). The extracted complex is determined to be RE[H（EHAMP）2][H（EHEHP）2]2 by the slope analysis method. The loading capacities of the mixtures consisting of 15% HEHAMP and 15% HEHEHP for Y and Lu are about 26.59 g/L（Yb2 O3） and 27.25 g/L（Lu2 O3）,respectively.
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