Method for quasi-fractionation extraction and separation of sodium and potassium in lithium sulfate
A lithium sulfate and quasi-fractionation technology, applied in the direction of improving process efficiency, can solve the problems of high operating environment requirements, low purity of lithium sulfate, poor separation effect, etc., and achieve the effects of good operating environment, low separation cost and easy operation.
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Embodiment 1
[0020] 1) Lithium sulfate feed solution
[0021] Lithium sulfate feed liquid is adjusted to pH 13 by lithium hydroxide, wherein the concentration of lithium is 1.5M, the concentration of sodium is 0.006M, and the concentration of potassium is 0.003M.
[0022] 2) Organic phase
[0023] The organic phase is a sulfonated kerosene solution of t-BAMBP, the concentration of t-BAMBP is 0.9M, and the lithium saponification rate is 18%.
[0024] 3) Apparent washing liquid
[0025] The apparent washing solution is a lithium sulfate feed solution, and the pH value is adjusted to 13 by using lithium hydroxide, wherein the concentration of lithium is 1.5M, the concentration of sodium is 0.006M, and the concentration of potassium is 0.003M.
[0026] 4) Quasi-fractionation extraction system
[0027] The quasi-fractional extraction system consists of an extraction section and an extraction and washing section. The organic phase of lithium saponification enters the quasi-fractionation extr...
Embodiment 2
[0033] 1) Lithium sulfate feed solution
[0034] Lithium sulfate feed liquid is adjusted to pH 13 by lithium hydroxide, wherein the concentration of lithium is 1.5M, the concentration of sodium is 0.002M, and the concentration of potassium is 0.001M.
[0035] 2) Organic phase
[0036] The organic phase is a sulfonated kerosene solution of t-BAMBP, the concentration of t-BAMBP is 1.0M, and the lithium saponification rate is 17%.
[0037] 3) Apparent washing liquid
[0038] The apparent washing solution is a lithium sulfate feed solution, and the pH value is adjusted to 13 by using lithium hydroxide, wherein the concentration of lithium is 1.5M, the concentration of sodium is 0.012M, and the concentration of potassium is 0.006M.
[0039] 4) Quasi-fractionation extraction system
[0040] The quasi-fractional extraction system consists of an extraction section and an extraction and washing section. The lithium saponified organic phase enters the quasi-fractionation extraction ...
Embodiment 3
[0046] 1) Lithium sulfate feed solution
[0047] Lithium sulfate feed liquid is adjusted to a pH value of 13 by lithium hydroxide, wherein the concentration of lithium is 2.0M, the concentration of sodium is 0.012M, and the concentration of potassium is 0.006M.
[0048] 2) Organic phase
[0049] The organic phase is a sulfonated kerosene solution of t-BAMBP, the concentration of t-BAMBP is 1.0M, and the lithium saponification rate is 20%.
[0050] 3) Apparent washing liquid
[0051] The apparent washing liquid is a lithium sulfate feed liquid, and the pH value is adjusted to 13 by using lithium hydroxide, wherein the concentration of lithium is 2.0M, the concentration of sodium is 0.012M, and the concentration of potassium is 0.006M.
[0052] 4) Quasi-fractionation extraction system
[0053] The quasi-fractional extraction system consists of an extraction section and an extraction and washing section. The lithium saponified organic phase enters the quasi-fractionation extr...
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