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http://dx.doi.org/10.7844/kirr.2014.23.5.21

Recovery of Li from the Lithium Containing Waste Solution by D2EHPA  

Ahn, Hyo-Jin (Dept. of Materials Sci. & Eng. Daejin University)
Ahn, Jae-Woo (Dept. of Materials Sci. & Eng. Daejin University)
Lee, Ki-Woong (Sung Eel Hitech Co., LTD.)
Son, Hyun-Tae (Sung Eel Hitech Co., LTD.)
Publication Information
Resources Recycling / v.23, no.5, 2014 , pp. 21-27 More about this Journal
Abstract
A study on the solvent extraction for the recovery of Li from lithium-containing waste solution was investigated using $D_2EHPA$ as an extractant. The experimental parameters, such as the pH of the aqueous solution, concentration of extractant and phase ratio were observed. Experimental results showed that the extraction percentage of Li was increased with increasing the equilibrium pH. More than 50% of Li was extracted in eq. pH 6.0 by 20% $D_2EHPA$. From the analysis of McCabe-Thiele diagram, 95% of Li was extracted by four extraction stage at phase ratio(O/A) of 3.0. Stripping of Li from the loaded organic phases can be accomplished by sulfuric acid as a stripping reagent and 90 ~ 120 g/L of $H_2SO_4$ was effective for the stripping of Li. Finially, Li was concentrated about 11.85 g/L by continuous stripping process, and then lithium carbonate was prepared by precipitation method.
Keywords
Solvent extraction; $D_2EHPA$; Lithium; Lithium carbonate; McCabe-Thiele diagram;
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Times Cited By KSCI : 2  (Citation Analysis)
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