Method for selectively separating vanadium and chromium from vanadium and chromium-containing solution
A selective, vanadium-chromium technology, applied in the field of hydrometallurgy, to achieve the effect of selective deep separation of vanadium-chromium
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Embodiment 1
[0025] A method for selectively separating vanadium-chromium from a vanadium-chromium-containing solution, such as figure 1 As shown, the process is as follows:
[0026](1) Add 1 mol / L hydrochloric acid and / or 1 mol / L sodium hydroxide to 1L of a solution with a vanadate concentration of 5 g / L and a chromate concentration of 5 g / L to adjust the pH of the solution to 6.8, Transform vanadium into polyvanadate and chromium into dichromate in the solution;
[0027] (2) Add a selective floating extraction agent to the above solution, the composition of which is: 50 parts by mass of primary amine N1923, 30 parts by mass of 1-octyl-3-methylimidazolium tetrafluoroborate, 20 parts by mass of tributyl phosphate Parts, the concentration is 10 g / L, add the association stabilizer, its composition is: 40 parts by mass of sodium sulfate, 30 parts by mass of sodium humate, 30 parts by mass of trisodium citrate, the concentration is 500 mg / L, then add Sodium hexametaphosphate dispersant, the ...
Embodiment 2
[0032] A method for selectively separating vanadium-chromium from a vanadium-chromium-containing solution, such as figure 1 As shown, the process is as follows:
[0033] (1) Add 1 mol / L hydrochloric acid and / or 1 mol / L sodium hydroxide to 1L of a solution with a vanadate concentration of 2 g / L and a chromate concentration of 500 mg / L to adjust the pH of the solution to 6.8 , so that the vanadium in the solution is converted into polyvanadate, and the chromium is converted into dichromate;
[0034] (2) Add a selective floating extraction agent to the above solution, the composition of which is: 60 parts by mass of primary amine N1923, 20 parts by mass of 1-octyl-3-methylimidazolium tetrafluoroborate, 20 parts by mass of tributyl phosphate Parts, the concentration is 4 g / L, add the association stabilizer, its composition is: 40 parts by mass of sodium sulfate, 30 parts by mass of sodium humate, 30 parts by mass of trisodium citrate, the concentration is 200 mg / L, then add Sodi...
Embodiment 3
[0039] A method for selectively separating vanadium-chromium from a vanadium-chromium-containing solution, such as figure 1 As shown, the process is as follows:
[0040] (1) Add 1 mol / L hydrochloric acid and / or 1 mol / L sodium hydroxide to 1L solution with a vanadate concentration of 100 mg / L and a chromate concentration of 100 mg / L to adjust the pH of the solution to 6.8, Transform vanadium into polyvanadate and chromium into dichromate in the solution;
[0041] (2) Add a selective floating extraction agent to the above solution, the composition of which is: 50 parts by mass of primary amine N1923, 30 parts by mass of 1-octyl-3-methylimidazolium tetrafluoroborate, 20 parts by mass of tributyl phosphate Parts, the concentration is 200 mg / L, add the association stabilizer, its composition is: 40 parts by mass of sodium sulfate, 30 parts by mass of sodium humate, 30 parts by mass of trisodium citrate, the concentration is 100 mg / L, then add Sodium hexametaphosphate dispersant, ...
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