화학공학소재연구정보센터
Separation and Purification Technology, Vol.159, 18-22, 2016
Removal of ferric ions from aluminum solutions by solvent extraction, part I: Iron removal
This study investigated removal of ferric ions from aluminum solutions to explore the basic data for the recovery of aluminum resources from coal spoil. A novel synergic extractant, consisting of di-(2-ethylhexyl) phosphoric acid (P204) and tertiary amine (N235) with sulfonated kerosene (SIC) as diluent, was adopted in this research. The influences of reaction time, pH, temperature, and phase ratio, on the extraction processes were systematically investigated. Result showed the Fe removal was greater than 97% in only one contact under optimal conditions. The corresponding stripping processes were also performed focusing on the effects of phase ratio, H2SO4 concentration, and reaction time. Almost 99% Fe was easily stripped using 1 mol/L H2SO4. These findings indicated that compared with single extractants, the new synergic extractant shows significant advantages. (C) 2015 Elsevier B.V. All rights reserved.