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研究螫合萃取剂1—苯基—3—甲基—4—苯甲酰吡唑酮—5(HPMBP)与酰胺型革取剂N_(503)氯仿溶液从硝酸介质中协萃钯(Ⅱ)的热力学行为。在30℃、pH=1.70条件下,萃取剂浓度与分配比的关系式可表达为lgD′=2.948lg[HPMBP]_((o))+6.645,lgD″=0.9809lg[N_(503).HNO_3]_((0))+2.796。温度与分配比的关系表达为lgD=424.923/T-0.3088。测得协革平衡常数k=34.67,焓变△H=-8.316kJ.mol~(-1),自由能变△G=-8.932kJ.mol~(-1)和熵变△S=2.036J.mol~(-1).K~(-1).
The synergistic extraction of palladium (Ⅱ) from nitric acid with 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (HPMBP) and amide- The thermodynamic behavior. The relationship between extractant concentration and partition ratio at 30 ℃ and pH = 1.70 can be expressed as lgD ’= 2.948lg [HPMBP] _ ((o)) + 6.645, lgD "= 0.9809lg [N_ (503). HNO 3] _ ((0)) + 2.796. The relationship between temperature and partition ratio was expressed as lgD = 424.923 / T-0.3088. The equilibrium constant of the co-evolution was determined as k = 34.67 and the enthalpy change ΔH = -8.316kJ · mol ~ (- 1), the free energy changes △ G = -8.932kJ.mol ~ (-1) and entropy change △ S = 2.036J.mol ~ (-1) .K ~ (-1).