Method for separating lanthanide series elements
A lanthanide, thermal method, applied in chemical instruments and methods, crystal growth, liquid solvent solutions at room temperature, etc. Efficient crystallization separation, avoiding multiple separations, and low cost
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Embodiment 1
[0040] Embodiment one: the separation of neodymium samarium (NdSm)
[0041] 0.3mmol NdCl 3 ·6H 2 O, 0.3 mmol SmCl 3 ·6H 2 O and 4.5 mmol H 3 BO 3 Put it in a 10ml polytetrafluoroethylene reaction kettle, add 0.1ml deionized water, seal it, heat up to 190°C, heat for 3 days, then cool to room temperature at a rate of 3-4oC / h, wash the product with a large amount of boiling water, and wash the lotion Collect them into a 100ml volumetric flask and make up to volume, and the resulting crystalline product is washed with ethanol and dried at room temperature.
[0042] The resulting crystals were characterized by a powder diffractometer, such as Figure 4Shown, prove that this doping reaction only generates the crystal of a kind of structure type, and this crystal has identical structure with NdBOCl crystal; Crystal is first dissolved with concentrated nitric acid, then diluted to low acidity, with inductively coupled plasma mass spectrometer ( ICP-Ms) measure the concentratio...
Embodiment 2
[0043] Embodiment two: the separation of neodymium dysprosium (NdDy)
[0044] 0.3mmolNdCl 3 ·6H 2 O, 0.3mmol DyCl 3 ·6H 2 O and 4.5 mmol H 3 BO 3 Put it in a 10ml polytetrafluoroethylene reaction kettle at a ratio of 1:1:15, add 0.1ml of deionized water, seal it, heat it up to 200°C, heat it for 3 days, and then cool it to room temperature at a rate of 3-4oC / h. After washing with a large amount of boiling water, the obtained crystal product was washed with ethanol and dried at room temperature, and the washing liquid was collected into a 100ml volumetric flask to constant volume.
[0045] The resulting crystals were characterized by a powder diffractometer, such as Image 6 As shown, it proves that the doping reaction only generates crystals of one structure type, and the crystals have the same structure as NdBOCl crystals; the crystals are first dissolved with concentrated nitric acid, then diluted to low acidity, and analyzed by an inductively coupled plasma mass spect...
Embodiment 3
[0046] Embodiment three: the separation of neodymium dysprosium (NdDy)
[0047] 0.3mmolNdCl 3 ·6H 2 O, 0.3mmol DyCl 3 ·6H 2 O and 6.0 mmol H 3 BO 3 Put it in a 10ml polytetrafluoroethylene reaction kettle at a ratio of 1:1:20, add 0.1ml of deionized water, seal it, heat it up to 210°C, heat it for 7 days, and then cool it to room temperature at a rate of 3-4oC / h. Wash with a large amount of boiling water, wash the product crystals with ethanol and dry at room temperature, and collect the washing liquid into a 100mL volumetric flask to constant volume.
[0048] The resulting product was characterized by a powder diffractometer, such as Figure 8 As shown, it was proved that the product contained three crystal types (NdBOCl, DyBO-1 and DyBO-2) with different structures.
[0049] Put the product in bromoform, stir well, let it stand for a period of time, and selectively suspend or precipitate in the bromoform solution due to the different densities of crystals of different...
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