N_(1923)-异丁醇-正庚烷/(H,Na)NO_3体系界面性质的研究

Effect of isobutyl alcohol on the interfacial properties of N_(1923) and extraction reaction

研究了异丁醇对N192 3 正庚烷 / (H ,Na)NO3 体系界面性质和有机相电导行为的影响 ,计算了界面吸附特性参数cmin和AⅠ ,得到N192 3 的AI 值为 71.4 2 ,添加异丁醇后 ,AⅠ 值增大 ,异丁醇体积的Vac>6 %以后 ,AⅠ 值接近恒定 ,其极限值约为 10 3 2 .有机相电导率 ρ随Vac增加而减小 ,当Vac>3.0 %时 ,ρ又增大 ,当Vac>6 .5 %时 ,ρ基本不再变化 ,ρ的最低值为 0 .0 2 μΩ·cm-2 ,极限值为 0 .0 72 μΩ·cm-2 .ρ随平衡水相酸度增加而增大并趋于恒定 ,界面张力γ随平衡水相酸度增加而下降 .ρ随温度升高而增加 ,达峰值后又趋于减小 ,γ则随温度升高呈减小趋势 .另结合有关实验结果 ,对N192 3

The influence of additive isobutyl alcohol on interfacial properties and conductivity of organic phase in primary amine N 1923 n heptane/(H,Na)NO 3 systems were studied.The interfacial parameters, c min and A I of surfactants have been obtained.As a result, A I values of N 1923 was 71.4?? 2.When adding isobutyl alcohol, A I values increased with increasing V ac ( V ac is volume centigrade of isobutyl alcohol in organic phase)increased,and approached to constant at V ac >6%,maximum values of A I was about 103?? 2.Electric conductivity ( ρ ) of organic phase decreased with increasing V ac .When V ac >3.0%, ρ increased.When V ac >6.5%, ρ was almost constant under experimental conditions.Lowest values of ρ was 0.02?μΩ·cm -2 ,limited value of ρ was 0.072?μΩ·cm -2 .Meanwhile,it was found that electric conductivity ( ρ ) of organic phase increased and approached to constant with increasing equilibrium aqueous phase acidic degree.Interfacial tensions( γ ) decreased with incressing equilibrium aqueous phase acidic degree. ρ increased with increasing temparature( T ).At T >47?℃, ρ decreased with increasing T ,maximum value of ρ is 0.077?μΩ·cm -2 .Under experimental conditions, γ decreased with increasing T .The correlation between the interfacial properties and the extraction reaction have also been discussed.