【摘要】 <正> 2-乙基己基膦酸单（2-乙基己基）酯[HEH（EHP）,HL]是萃取分离稀土元素的有效萃取剂.HEH（EHP）从矿物酸溶液中萃取Ho（Ⅲ）—Er（Ⅲ）两组分元素时,其分离系数β_B6^Er在H₂SO₄体系中最大,因此,研究HEH（EHP）从硫酸介质中萃取Er（Ⅲ）的平衡反应具有实际意义.作者和马恩新等研究了低浓度稀土元素在HNO₃-HEH（EHP）体系中的分配平衡,但HEH（EHP）从硫酸溶液中萃取稀土元素（Ⅲ）的平衡反应未见报道.本文研更多还原

【Abstract】 The partition equilibria of erbium （Ⅲ） between sulphuric acid and HEH（EHP） in octane were investigated. Extraction reactions of erbium （Ⅲ） were obtained at diffe ent acidities. The solid complex of ErL₃·mH₂O species has been obtained. The IR and NMR spectra of the extracted complex were studied.更多还原