【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。更多还原

【Abstract】 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 TbA3·HA, TbA3·2DBBP and TbA3·32TBP. Their extraction equilibrium constants have been calculated with the following results. for Tb3+ (10-5M)/HNO3,NaNO3(μ=0.1)/PMBP-C6H5Cl system,for Tb3+ (10-5M)/HNO3,NaNO3(μ = 0.1)/PMBP-DBBP-C6H5Cl system,Ks,c=[TbA3·2DBBP]0[H+]3/[Tb3+][HA]03[B]02=2.19×102(20°C) for Tb3+ (10-5M)/HNO3,NaNO3(μ =0.1)/PMBP-TBP-C6H5Cl system,The mechanism of the extraction and structures of the extracted species are discussed.更多还原