P204萃取铟的热力学研究  

Study on thermodynamics of solvent extraction of indium with P204

作　　者：刘兴芝[1] 房大维[1] 李俊[1] 关英勋[1] 王鲁宁[1] 

机构地区：[1]辽宁大学化学科学与工程学院,辽宁沈阳110036

出　　处：《广东有色金属学报》2005年第1期4-7,共4页Journal of Guangdong Non-Ferrous Metals

基　　金：国家自然科学基金资助项目(20441005)

摘　　要：以Na2SO4为支持电解质,在P204+In2(SO4)3+n C8H18+Na2SO4+H2O体系中,在温度278.15～303.15K和离子强度0.1～2.0mol·kg-1范围内,测定了萃取平衡水相中铟浓度和pH值.应用直线外推法在计算机上通过EXCEL计算了萃取反应的标准平衡常数K0,并得到经验公式logK0=-26.3+4.87×103/T+4.77×10-2T,同时计算了萃取反应的其他热力学量.<Abstrcat> The equilibrium molalities of In^(3+) and pH in the aqueous phase were measured at ionic strengths from 0.1 to 2.0 mol/kg at temperatures from 278.15 K to 303.15 K with Na_2SO_4 as supporting electrolyte. The standard equilibrium constants K^0 at various temperatures were calculated on EXCEL by means of straight-line extrapolation. The empirical formula were obtained: logK^0=-26.3+4.87×10~3/T+4.77×10^(-2)T. And the other thermodynamic quantities for the extraction process were calculated.

关 键 词：力学研究 P204 NA2SO4 标准平衡常数 铟 萃取反应 支持电解质 EXCEL 离子强度 萃取平衡 经验公式 热力学量 15K 计算机 外推法 pH值 水相 

分 类 号：O642.43[理学—物理化学] TP319[理学—化学]