Method for producing vanadyl sulfate battery electrolyte by using vanadium-containing pickle liquor

[0040] V 4g / L, Fe 20g / L, Al 20g / L, Si 20g / L in the vanadium-containing acid immersion solution in this embodiment.

[0041]The present embodiment utilizes the method that contains vanadium acid dipping solution to produce vanadyl sulfate battery electrolyte, and concrete process is as follows:

[0042] (1) add reducing agent sodium sulfite to vanadic acid immersion solution and carry out reduction reaction 0.5h, the add-on of sodium sulfite accounts for 30% of Fe element quality in the vanadic acid immersion solution, after reaction finishes, add sodium hydroxide to adjust solution pH to 2.2 .

[0043] (2) select the extraction agent that the mass ratio is 30:5:65 P204, isoamyl alcohol, 260# solvent oil composition, carry out multistage countercurrent extraction once to the vanadic acid immersion solution after the reduction treatment, in the extraction process, organic The ratio of phase to water is 0.8, the extraction time is 5min, and the organic phase and the raffina

[0049] The vanadium-containing acid immersion solution in this embodiment is V 2g / L, Fe 15g / L, Al 14g / L, Si 15g / L.

[0050] The present embodiment utilizes the method that contains vanadium acid dipping solution to produce vanadyl sulfate battery electrolyte, and concrete process is as follows:

[0051] (1) Add reducing agent sodium sulfite to the vanadic acid immersion solution and reduce the reaction for 1h at normal temperature. The addition of sodium sulfite accounts for 25% of the Fe element quality in the vanadic acid immersion solution. After the reaction, add sodium hydroxide to adjust the pH of the solution to 1.7.

[0052] (2) select the extraction agent that the mass ratio is 10:5:85 P507 (2-ethylhexyl phosphate mono-2-ethylhexyl ester), secondary octanol, 260# solvent oil composition, carry out multistage countercurrent extraction once, Among them, the ratio of the organic phase to water is 0.5, the extraction time is 15min, and the organic phase and the raff

[0058] The vanadium-containing acid immersion solution in this embodiment is V 7g / L, Fe 25g / L, Al 24g / L, Si 23g / L.

[0059] The present embodiment utilizes the method that contains vanadium acid dipping solution to produce vanadyl sulfate battery electrolyte, and concrete process is as follows:

[0060] (1) add reducing agent sodium sulfite to vanadic acid immersion solution and carry out reduction reaction 1.5h, the add-on of sodium sulfite accounts for 45% of Fe element quality in the vanadic acid immersion solution, after reaction finishes, add sodium hydroxide to adjust solution pH to 1.5 .

[0061] (2) select the extractant that mass ratio is 15:10:75 P507, isooctyl alcohol, sulfonated kerosene to form, carry out multistage countercurrent primary extraction to the vanadic acid after step (1) reduction, obtain primary extraction organic phase And a raffinate, the ratio of the organic phase to water is 1, the extraction time is 10min, and the V 7g / L, Fe 1.5g / L, Al