A kind of extraction and separation method of co-producing 4n dysprosium and 4n ytterbium
A separation method and extraction technology, which are applied in the field of preparing 4N-grade dysprosium chloride and 4N-grade ytterbium chloride by fractionation extraction method, can solve the problems of low qualification rate of 4N-grade products, poor process stability, large acid-base consumption, etc. The effect of increasing the rate, reducing the consumption of acid and alkali, and reducing the consumption of alkali
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Embodiment 1
[0031] The saponified C272 organic phase is 30% by volume of C272 in the kerosene solution of the extractant C272, and the saponification rate is 36%.
[0032] The pH of the 2N-grade dysprosium chloride solution is 3, and the concentrations of rare earth elements are: Gd 0.030g / L, Tb 0.20g / L, Dy160.0g / L, Ho 0.30g / L, Y 0.10g / L, Er 0.060g / L, Tm 0.030g / L.
[0033] The enrichment thulium ytterbium lutetium chloride solution has a pH of 3, and the concentrations of rare earth elements are: Ho 0.040g / L, Y 0.20g / L, Er 2.0g / L, Tm 16.0g / L, Yb 130.0g / L, Lu 18.0g / L.
[0034] Step 1: Fractional distillation and extraction to separate GdTbDy / DyHoYErTm
[0035] The saponified C272 organic phase is used as the extracted organic phase, the 2N grade dysprosium chloride solution is used as the first feed solution, and 3.0mol / L HCl is used as the washing acid. The saponified C272 organic phase enters the GdTbDy / DyHoYErTm fractional distillation extraction system from the first stage, the fir...
Embodiment 2
[0050] The saponified C272 organic phase is 30% by volume of C272 in the kerosene solution of the extractant C272, and the saponification rate is 36%.
[0051] The pH of the 2N-grade dysprosium chloride solution is 2, and the concentrations of rare earth elements are: Gd 0.050g / L, Tb 0.40g / L, Dy165.0g / L, Ho 0.70g / L, Y 0.20g / L, Er 0.10g / L, Tm 0.050g / L.
[0052] The enrichment thulium ytterbium lutetium chloride solution has a pH of 4, and the concentrations of rare earth elements are: Ho 0.0060g / L, Y 0.30g / L, Er 3.0g / L, Tm 18.0g / L, Yb 125.0g / L, Lu 20.0g / L.
[0053] Step 1: Fractional distillation and extraction to separate GdTbDy / DyHoYErTm
[0054] The saponified C272 organic phase is used as the extracted organic phase, the 2N grade dysprosium chloride solution is used as the first feed solution, and 3.0mol / L HCl is used as the washing acid. The saponified C272 organic phase enters the GdTbDy / DyHoYErTm fractional distillation extraction system from the first stage, the fir...
Embodiment 3
[0069] The saponified C272 organic phase is 30% by volume of C272 in the kerosene solution of the extractant C272, and the saponification rate is 36%.
[0070] The pH of the 2N grade dysprosium chloride solution is 4, and the concentrations of rare earth elements are: Gd 0.010g / L, Tb 0.050g / L, Dy155.0g / L, Ho 0.10g / L, Y 0.050g / L, Er 0.020g / L, Tm 0.010g / L.
[0071] The enrichment thulium ytterbium lutetium chloride solution has a pH of 2, and the concentrations of rare earth elements are: Ho 0.0020g / L, Y 0.10g / L, Er 1.0g / L, Tm 14.0g / L, Yb 135.0g / L, Lu 16.0g / L.
[0072] Step 1: Fractional distillation and extraction to separate GdTbDy / DyHoYErTm
[0073] The saponified C272 organic phase is used as the extracted organic phase, the 2N grade dysprosium chloride solution is used as the first feed solution, and 3.0mol / L HCl is used as the washing acid. The saponified C272 organic phase enters the GdTbDy / DyHoYErTm fractional distillation extraction system from the first stage, the ...
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