摘要
在298.15K和离子强度为0.1～2.0moL·Kg^(-1)范围内,在较高浓度和浓酸度的萃取体系In_2(SO_4)_3—Na_2SO_4—D_2EHMTPA—n—C_8H_(18)—H_2O中,本文测定了萃取平衡。 In_(aq)^(3+)+3H_2A_(2(org))→In(HA_2)_(3(org))+3H_(aq)^+的In^(3+)的平衡浓度和水相pH值,其中Na_2SO_4为支持电解质。根据Pitzer电解质溶液理论,估算了平衡水相中的真实离子强度值,并用直线外推法和多项式拟合法确定了萃取过程的热力学平衡常数K~θ。
In an extraction equilibrium In^(3+)(eq)+3H_2A_2 (org)=In(HA_2)_3(org)+3H^+(aq) in {In_2(SO_4)_3+Na_2SO_4+D_2EHMTPA+n-C_8H_(18)+water} the molality of In^(3+) and pH were measured at ionic strengths from 0.1 to 2.0 mol/kg, in an aqueous phase containing a supporting electrolyte Na_2SO_4 at 298.15K and with a constant original molality of extractant in the organic phase. The standard thermodynamic constants K^0 of extraction equilibrium were obtained by each of the two methods proposed in our previous paper.
出处
《辽宁大学学报（自然科学版）》
CAS
1993年第2期51-57,共7页
Journal of Liaoning University：Natural Sciences Edition
关键词
萃取
铟
D2EHMTPA
Extraction, Indium, Di(2-ethylhexyl) monothiophosphoric acid.
