PMBP与中性磷萃取剂对铽(Ⅲ)的协同萃取  

SYNERGISTIC EXTRACTION OF TERBIUM WITH 1-PHENYL-3-METHYL-4-BENZOYL-PYRAZOLONE-5 AND NEUTRAL ORGANOPHOSPHORUS EXTRACTANTS

作　　者：陈金榜[1] 杜金庚 路德元 Chen Jinbang;Du Jingeng;Lu Deyuan(Department of Technical Physics,Beijing University,Beijing)

机构地区：[1]北京大学技术物理系

出　　处：《高等学校化学学报》1983年第3期277-282,共6页Chemical Journal of Chinese Universities

摘　　要：本文研究了1-苯基-3-甲基-4-苯甲酰基吡唑啉酮-5(PMBP)与丁基膦酸二丁酯(DBBP)或磷酸三丁酯(TBP)的氯苯溶液在硝酸介质中对铽(Ⅲ)的协同萃取。测得了萃合物的组成及其萃取平衡常数,讨论了萃合物的可能结构式及协同萃取机理。The extraction of terbium (Ⅲ) from nitric acid solutions with mixtures of 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5(PMBP)and dibutyl butylphos-phonate (DBBP), tri-n-butyl phosphate (TBP) in chlorobenzol has been investigated.The formulas of the extracted species have been shown to be TbA_(3)·HA, TbA_(3)·2DBBP and TbA_(3)·32TBP. Their extraction equilibrium constants have been calculated with the following results. for Tb^(3+) (×10^(-5)M)/HNO_(3),NaNO_(3)(μ=0.1)/PMBP-C_(6)H_(5)Cl system,■for Tb^(3+) (×10^(-5)M)/HNO_(3),NaNO_(3)(μ = 0.1)/PMBP-DBBP-C_(6)H_(5)Cl system,■Ks,c=[TbA_(3)·2DBBP]0[H^(+)]3/[Tb^(3+)][HA]03[B]02=2.19×10^(2)(20°C) for Tb^(3+) (×10^(-5)M)/HNO_(3),NaNO_(3)(μ =0.1)/PMBP-TBP-C_(6)H_(5)Cl system,The mechanism of the extraction and structures of the extracted species are discussed.

关 键 词：铽(Ⅲ) 协同萃取 萃取平衡常数 萃取机理 萃合物 硝酸介质 PMBP 中性磷萃取剂 

分 类 号：O65[理学—分析化学]