![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
ABSTRACT
The three-phase extraction systems TOA-n-heptane / HC1, TOA-kerosene / HC1, TOA-kerosene / HCl-ZnCl2 and TOA-kerosene / HCl-FeCl3 have been investigated. The volumes and compositions of the equilibrium phases for these systems have been determined at 298K at a phase ratio of one.
In the HC1 extraction system, amphiphilic molecules TOA-HC1 in heavy organic phase (i.e. the third phase or the middle phase) self-assemble into a lamellar structure, and water and alkane are solubilized in polar layers and nonpolar layers respectively. The solubilization capacities are within the saturation value of TOAHCl:H20:n-heptane=l:2:3 (molar ratio). The solubiiizition decreases when the ratio of initial HC1 concentration to initial TOA concentration is less than one and excess acid and water are extracted into the middle phase if initial concentration of HC1 is higher than that of TOA.
Zinc and iron are mainly extracted into the middle phase. The metal extraction systems have different phase behavior than the acid extraction system because of the different nature of the interfacial amphiphilic molecules.
Key words:
Notes
This study is supported by the Natural Science Foundation of Shandong Province of China