Pre-separating and high-purity three-outlet extracting method
An extraction method and three-outlet technology, applied in the field of solvent extraction and separation of rare earth technology
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Embodiment 1
[0028] After the rare earth chloride solution of Baotou light rare earth mine is grouped by Nd / Sm, the outlet water phase La-Nd mixed rare earth is the raw material of this example, and the rare earth concentration of the rare earth chloride feed solution is 1.5mol L -1 , pH﹦2~3, the rare earth distribution is as follows:
[0029] element La 2 o 3 CeO 2 PR 6 o 11 Nd 2 o 3 SM 2 o 3 W% 26.3 52.1 6.8 14.8 ﹤0.01
[0030] The organic phase is extracted by the extractant P 507 (2-ethylhexyl phosphate mono-2-ethylhexyl ester) and diluent kerosene, P in the organic phase 507 The concentration is 1.5mol L -1 , P 507 Saponification concentration is 0.56mol L -1 . With a kind of pre-separation high-purity three-outlet extraction method of the present invention, described embodiment 1——use the pre-separation high-purity three-outlet extraction method to separate the La-Nd mixed rare earths of light rare earth ore, and carry out extraction...
Embodiment 2
[0035] Sichuan bastnaesite was grouped by Nd / Sm to obtain La-Nd mixed rare earth chloride solution, which was used as the raw material of this example, and its rare earth concentration was 1.4mol L -1 , pH﹦2~3, the rare earth distribution is as follows:
[0036] element La 2 o 3 CeO 2 PR 6 o 11 Nd 2 o 3 SM 2 o 3 W% 40.52 46.83 3.56 9.09 ﹤0.01
[0037] The organic phase is extracted by the extractant P 507 (2-ethylhexyl phosphate mono-2-ethylhexyl ester) and diluent kerosene, P in the organic phase 507 The concentration is 1.5mol L -1 , P 507 The saponification concentration is 0.54mol L -1 . With a kind of pre-separation high-purity three-outlet extraction method of the present invention, described embodiment 1——use the pre-separation high-purity three-outlet extraction method to separate the La-Nd mixed rare earths of light rare earth ore, and carry out extraction and separation. The process flow used is shown in the appendix...
Embodiment 3
[0042] The GdTbDy enrichment produced from low yttrium ion adsorption type rare earth ore is used as raw material, and the rare earth concentration of the rare earth chloride solution is 1.2mol L -1 , pH≈3, the rare earth distribution is as follows:
[0043] element Gd 2 o 3 Tb 4 o 7 Dy 2 o 3 Ho 2 o 3 ∑ W% 40.9 12.8 46 0.26 99.96
[0044] The organic phase is extracted by the extractant P 507 (2-ethylhexyl phosphate mono-2-ethylhexyl ester) and diluent kerosene, P in the organic phase 507 The concentration is 1.5mol L -1 , P 507 Saponification concentration is 0.56mol L -1 . With a kind of pre-separation high-purity three-outlet extraction method of the present invention, described embodiment 2---separate GdTbDy enrichment by pre-separation high-purity three-outlet extraction method, carry out extraction and separation, and the process flow used is shown in the appendix figure 2 shown. Due to the Tb in the GdTbDy enrichment ...
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