摘要
报道了用二 (2 乙基己基 )二硫代磷酸为萃取剂 ,以正庚烷为稀释剂萃取铟的热力学研究。在In2 (SO4 ) 3+Na2 SO4 +D2 EHDTPA +n C7H1 6 +H2 O体系中 ,在温度 2 78.15～ 3 0 3 .15K和离子强度 0 .1～ 2 .0mol·kg- 1 范围内 ,以Na2 SO4 为支持电解质 ,测定了萃取平衡水相中In3+浓度和pH值。计算了萃取反应的标准平衡常数K0 ,并得到经验公式logK0 =43 .93 -5 3 68.5 4 T -0 .0 699T ,同时计算了萃取反应的其他热力学量 。
The thermodynamics of the solvent extraction of In 3+ with D 2EHDTPA was studied. The equilibrium molality of In 3+ and pH in [I n 2 (SO 4) 3 +Na 2SO 4+D 2EHDTPA+ n C 7H 16 +water] was measured at ionic strength from 0.1 to 2.0 mol·kg -1 in the aqueous phase containing Na 2SO 4 as the supporting electrolyte and at constant initial molality of extraction in the organic phase at temperatures from 278.15～303.15 K. The effective ionic strength and the standard extraction equilibrium constants K 0 were obtained based on the Debye Hückel electrolyte theory. Other thermodynamic quantities for the extraction process were calculated. It is concluded that enthalpy and entropy are the motive forces of the reaction.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2003年第3期343-346,共4页
Chinese Journal of Rare Metals
基金
辽宁省教育厅自然科学基金资助项目 (990 12 10 15 )
