Solvent Extraction of Sn(TV) from Hydrochloric Acid Solution by Alamine 336

摘要

The solvent extraction behavior of Sn(IV) from hydrochloric acid was investigated using Alamine336 (Tri-n-cotylamine) as an extractant. The experimental parameters of the concentration of the HC1 solution, chloride ions, extractant, and Sn(IV) were assessed. The results showed that the extraction percentage of Sn(TV) was more than 95% in our experimental range and was only slightly affected by the HC1 concentration. The extraction reaction of Sn(TV) by Alamine 336 from the chloride solution was identified as follows: SnCl~(2-)_6+2R_3NHCl_(org)=(R_3NH)_2SnCl_(6(org))+2Cl~-, and K=6.3 X 10~4. Stripping experiments of Sn(TV) from the loaded organic phase were done by using several stripping agents. A stripping percentage of 90% was obtained with a 2.0 M NaOH solution.