| Abstract: We used HTTA and TBP as synergic extraction carriers in liquid membrane for separating and concentrating Li+ from K+,Na+ and Li+ mixed aqueous solution.The results are as followsithe ratio of HTTA to TBP was 112 to 1:4 and total concentration of carriers was 0.2mol·-1; the pH of external aqueous medium should be more than 12 and inner phase was 6mol·l-1H+; surfactant(lan-113B) concentration in membrane was 1%(w%); the ratio of external phase to emulsion was 1:10. In the condition of external phase containing [Li+]= 100ppm, [K+]= 5,000ppm and [Na+] = 15,000ppm,after first treatment, the 98% of Li+was concentrated in the inner phase in 5 min and the concentrations of ions in the inner phase were [Li+] 1,800ppm,[Na+] =9,000ppm and [K+]= 1.000ppm. After second treatment,the concentration of Li+ came up to 18,000ppm but Na+ and K+were only 2,600ppm and 200ppm,respcctively. |
