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本文利用推广的对应溶液法测定了丁基膦酸二丁酯(DBBP)和甲基膦酸二异戊酯(DAMP)萃取硝酸的平衡常数β_i和硝酸分子在两相间的分配常数Λ=(HNO_3)_0/(HNO_3)_0其结果: HNO_3/DBBP-C_6H_6体系 HNO_3/DAMP-C_6H_6体系 β_i=(DBBP·i HNO_3)_0/(DBBP)_0(HNO_3)~i β_i=(DAMP·i HNO_3)/(DAMP)_0(HNO_3)~i β_1=14.0 β_1=12.8 β_2=0.87 β_2=0.19 Λ=7×10~(-3) β_3=0.07 Λ=6×10~(-3)
In this paper, the equilibrium constants β_i of nitric acid extracted by dibutylbutylphosphonate (DBBP) and diisopentylmethylphosphonate (DAMP) and the distribution constant of nitric acid molecules between two phases Λ = (HNO 3 ) _0 / (HNO_3) _0 The results: HNO_3 / DBBP-C_6H_6 system HNO_3 / DAMP-C_6H_6 system β_i = (DBBP · i HNO_3) _0 / DBBP_0 (HNO_3) ~ i β_i = (DAMP · i HNO_3) / (DAMP) _0 (HNO_3) ~ i β_1 = 14.0 β_1 = 12.8 β_2 = 0.87 β_2 = 0.19 Λ = 7 × 10 -3 β_3 = 0.07 Λ = 6 × 10 -3