Di (2-ethylhexyl)phosphate levextrel resin(CL-P204) showed a maximum distribution coefficient for In(Ⅲ) adsorption at pH=1. 0 in sulfuric acid. The steady adsorption capacity was 48. 5 mg/g and the adsorption enthalp...Di (2-ethylhexyl)phosphate levextrel resin(CL-P204) showed a maximum distribution coefficient for In(Ⅲ) adsorption at pH=1. 0 in sulfuric acid. The steady adsorption capacity was 48. 5 mg/g and the adsorption enthalpy was 9. 2 kJ/mol. The isothermal adsorption equation is Q=60. 2c0. 1 (25℃). The adsorption mechanism has been investigated by IRmeasurement.展开更多
Recovering critical metals from secondary resources have attracted great interest recently.In this work,a green one-pot leaching-extraction process based on tributyl(tetradecyl)phosphonium chloride (P_(44414)Cl)aqueou...Recovering critical metals from secondary resources have attracted great interest recently.In this work,a green one-pot leaching-extraction process based on tributyl(tetradecyl)phosphonium chloride (P_(44414)Cl)aqueous biphasic system (ABS) was developed to efficiently recover rare earth elements (REEs) from Nd Fe B permanent magnet.The reaction process,phase separation mechanism,and operation conditions were thoroughly investigated.It is found that the P_(44414)Cl-HCl ABS showed strong extraction ability towards Fe (>99%) whereas only a few REEs (<10%) were extracted,leading to extremely high separation selectivity between Fe and REEs.The characterization results showed that the coordination differences of Fe and Nd in HCl were the main driving forces for such highly selective separation.The phase diagram of P_(44414)Cl-Nd Cl_(3)ABS indicated that the salting-out effect of Nd Cl_(3)was stronger than common chlorides.Due to the hydrophobic property of P_(44414)[Fe Cl_(4)]and salting-out effect of Nd Cl_(3),the P_(44414)Cl could directly form ABS at room temperature after dissolving practical roasted Nd Fe B samples without any other operations and reagents.REEs and Fe could be mutually separated in just one step.Compared with traditional liquid-liquid extraction or ABS separation,this recovery process is green and facile and shows great application prospects in the field of rare-earth recovery.展开更多
文摘Di (2-ethylhexyl)phosphate levextrel resin(CL-P204) showed a maximum distribution coefficient for In(Ⅲ) adsorption at pH=1. 0 in sulfuric acid. The steady adsorption capacity was 48. 5 mg/g and the adsorption enthalpy was 9. 2 kJ/mol. The isothermal adsorption equation is Q=60. 2c0. 1 (25℃). The adsorption mechanism has been investigated by IRmeasurement.
基金supported by the National Natural Science Foundation of China (No.U2067213)Natural Science Foundation of Zhejiang Province (No.LR21B060001)the Fundamental Research Funds for the Central Universities (No.2021QNA4029)。
文摘Recovering critical metals from secondary resources have attracted great interest recently.In this work,a green one-pot leaching-extraction process based on tributyl(tetradecyl)phosphonium chloride (P_(44414)Cl)aqueous biphasic system (ABS) was developed to efficiently recover rare earth elements (REEs) from Nd Fe B permanent magnet.The reaction process,phase separation mechanism,and operation conditions were thoroughly investigated.It is found that the P_(44414)Cl-HCl ABS showed strong extraction ability towards Fe (>99%) whereas only a few REEs (<10%) were extracted,leading to extremely high separation selectivity between Fe and REEs.The characterization results showed that the coordination differences of Fe and Nd in HCl were the main driving forces for such highly selective separation.The phase diagram of P_(44414)Cl-Nd Cl_(3)ABS indicated that the salting-out effect of Nd Cl_(3)was stronger than common chlorides.Due to the hydrophobic property of P_(44414)[Fe Cl_(4)]and salting-out effect of Nd Cl_(3),the P_(44414)Cl could directly form ABS at room temperature after dissolving practical roasted Nd Fe B samples without any other operations and reagents.REEs and Fe could be mutually separated in just one step.Compared with traditional liquid-liquid extraction or ABS separation,this recovery process is green and facile and shows great application prospects in the field of rare-earth recovery.
