A kind of method for preparing 4n level calcium nitrate solution
A technology of calcium nitrate and solution, applied in the direction of calcium/strontium/barium nitrate, etc.
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Embodiment 1
[0021] The P507 organic phase is a kerosene solution of P507 and TBP, wherein the concentration of P507 is 1.0 mol / L, and the concentration of TBP is 0.05 mol / L. When in use, the P507 organic phase is saponified with sodium hydroxide to obtain the sodium saponified P507 organic phase.
[0022] The element concentrations in the calcium nitrate enrichment solution are: Cl 0.30 g / L, Si 0.010 g / L, P 0.010 g / L, Na 0.10 g / L, Mg 1.0 g / L, Ca 100.0 g / L, Ba 1.0 g / L, Pb 0.010 g / L, Al 0.010 g / L, Fe 0.010 g / L.
[0023] Step 1: Separation of NaMgCa / CaBaPbAlFe by fractional distillation with full load
[0024] The balanced load P507 organic phase obtained at the 18th stage of the NaMg / Ca full-load fractionation extraction system in step 2 is the extraction organic phase, the calcium nitrate enrichment solution is the feed liquid, and the Ca / BaPbAlFe fractionation extraction system of step 3 is obtained at the 20th stage The equilibrium aqueous phase is the detergent. The balanced load P50...
Embodiment 2
[0031] The P507 organic phase is a kerosene solution of P507 and TBP, wherein the concentration of P507 is 1.0 mol / L, and the concentration of TBP is 0.05 mol / L. When in use, the P507 organic phase is saponified with sodium hydroxide to obtain the sodium saponified P507 organic phase.
[0032] The element concentrations in the calcium nitrate enrichment solution are: Cl 0.60 g / L, Si 0.020 g / L, P 0.020 g / L, Na 0.30 g / L, Mg 3.0 g / L, Ca 110.0 g / L, Ba 2.0 g / L, Pb 0.020 g / L, Al 0.030 g / L, Fe 0.020 g / L.
[0033] Step 1: Separation of NaMgCa / CaBaPbAlFe by fractional distillation with full load
[0034] The balanced load P507 organic phase obtained at the 16th stage of the NaMg / Ca full-load fractionation extraction system in step 2 is the extraction organic phase, the calcium nitrate enrichment solution is the feed liquid, and the Ca / BaPbAlFe fractionation extraction system of step 3 is obtained at the 22nd stage The equilibrium aqueous phase is the detergent. The balanced load P50...
Embodiment 3
[0041] The P507 organic phase is a kerosene solution of P507 and TBP, wherein the concentration of P507 is 1.0 mol / L, and the concentration of TBP is 0.05 mol / L. When in use, the P507 organic phase is saponified with sodium hydroxide to obtain the sodium saponified P507 organic phase.
[0042] The element concentrations in the calcium nitrate enrichment solution are: Cl 0.90 g / L, Si 0.030 g / L, P 0.030 g / L, Na 0.50 g / L, Mg 5.0 g / L, Ca 120.0 g / L, Ba 3.0 g / L, Pb 0.030 g / L, Al 0.050 g / L, Fe 0.030 g / L.
[0043] Step 1: Separation of NaMgCa / CaBaPbAlFe by fractional distillation with full load
[0044] The balanced load P507 organic phase obtained at the 14th stage of the NaMg / Ca full-load fractionation extraction system in step 2 is the extraction organic phase, the calcium nitrate enrichment solution is the feed liquid, and the Ca / BaPbAlFe fractionation extraction system of step 3 is obtained at the 22nd stage The equilibrium aqueous phase is the detergent. The balanced load P50...
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