The specific subjects as bellow: Firstly the two aqueous two-phase system of PEG/ ( NH4) 2SO4 and PEG/ K2HPO4 were compared, then the better system was used for the aqueous two-phase extraction. 首先针对聚乙二醇/硫酸铵和聚乙二醇/磷酸氢二钾这两个双水相体系进行比较,选取较好聚乙二醇/硫酸铵的双水相体系用于双水相萃取分离。
The results show that the initial forward extraction rate of phosphoric acid increases by increasing interfacial area between the two phases and the initial concentrations of hydrochloric acid and phosphoric acid in aqueous phase, and phosphoric acid extraction with TBP may be a diffusion controlling regime. 结果表明,磷酸的初始止向萃取速率随两相界面积、水相初始磷酸、盐酸浓度的增大而增大。磷酸三丁酯对磷酸的萃取可能属扩散控制模式。