缑泽明; 朱慎林
Gou zemin; Zhu Shenlin
摘要: Tri-n-butyl phosphate (TBP)dissolved in kerosene was chosen as extractant for lithium from a model brine having high
magnesium-to-lithium ratio and ferric chloride was added to the system.The influences of contact time, concentration of the
extractant, concentrations of some salts (Mg2+, Na+, K+)in the solution, acidity of hydrochloric acid and extraction
temperature on the extraction of lithium with TBP-kerosene system were studied.The suitable extraction conditions were found
to be :contact time not any less than 20 min;at 20—25℃;[Fe3+]/[Li+]about 1.5—2.0;TBP concentration 50%—70%;
[MgCl2] exceeding 3 mol*L-1;pH about 2;while most sodium and potassium salts in the aqueous phase should be removed before
the extraction.