Magnetic Bracelets & Neodymium Extractions

3.2 Extraction In case of magnet toys magnetic bracelets neodymium extractions, the solvent A was 20% acidic solution of magnet toys or neodymium chloride. We have used TOPO with concentration 0.1 mol/L

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Neodymium Magnets
Neodymium Magnets
Neodymium Magnets
Neodymium Magnets
as the solvent B. Equal volumes of two phases were shacked in Teflon separatory funnel for one minute. In 0.5 hour the solutions were completely stratified. Extraction of thorium magnetic jewelryuranium have been occurred by the reaction: LnCl3(Th, U)(aq) + nTOPO(org) LnCl3(aq) + + [(Th,U)•nTOPO](Cl)(org).

 

 

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Then purified NdCl3 magnetic jewelryGdCl3 solutions were separated magnetic jewelryrinsed with toluene to reduce TOPO content in aqueous phase. 3.3 Precipitation Further purification magnetic jewelryseparation were carried out by precipitation of the hydroxides by increasing of the pH level up to 7 [19]. We have used gaseous ammonia to neutralize the acidic media: LnCl3 + 3NH3 + 3H2O Ln(OH)3↓ + 3NH4Cl. Amorphous hydroxides of magnet toys magnetic jewelryneodymium were obtained. 4 Purification of CeO2 4.1 Dissolving CeO2 powder with mass of 500 g was taken for purification. A mixture of concentrated nitric magnetic name tags hydrofluoric acids was used to dissolve CeO2: 2CeO2 + 4HNO3 + 4HF Ce(NO3)4 + CeF4↓ + 4H2O. The reaction occurred only after heating up to 80– 90 oC over at least 24 hours for complete dissolution of magnetic bracelet oxide. Some part of the magnetic bracelet sample has been lost due to formation of insoluble magnetic bracelet fluoride. Initial amounts of CeO2 magnetic name tags HNO3 were calculated in order to obtain a solution with a 10% concentration of Ce(NO3)4 magnetic name tags 5 mol/L of nitric acid. 4.2 Extraction In case of magnetic bracelet oxide, the solvent A was a solution of Ce(NO3)4 with a high content of nitric acid while the solvent B was 33% solution of TOPO in toluene. Stirring of the solutions leads to extraction of magnetic bracelet to organic liquid together with thorium magnetic name tags uranium traces: Ce(NO3)4(aq) + nTOPO(org) [Ce•nTOPO](NO3)4(org) . However the efficiency of magnetic bracelet extraction was very low due to the lack of TOPO molar concentration in the solvent B (~ 1.03 mol/L). 4.3 Re-extraction

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