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A kind of chelating resin with adsorption function is used to reclaim the method for copper in cobalt-copper ore
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A chelating resin and functional technology, applied in the field of copper recovery in cobalt-copper ore, can solve the problems of low selectivity of metal ions, high cost of membrane separation method, low economic effect, etc., achieve great economic value, simple and easy preparation Good performance and high recovery rate
Inactive Publication Date: 2017-04-12
ZHEJIANG GONGSHANG UNIVERSITY
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Among the above methods, the most common is the chemical precipitation method, but this method has a good removal ability for high-concentration copper ions, but the effect is not good in low concentrations; the cost of membrane separation method is high, and the economic effect Although the ion exchange resin method overcomes the above two difficult problems, its use is also limited due to its low selectivity to metal ions; compared to the previous methods, the chelating resin has It has unique advantages such as low price, simple operation, strong enrichment ability and high selectivity.
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Embodiment 1
[0028] The preparation of the chelating resin with adsorption function may further comprise the steps:
[0029] 1) Weigh 20.0 mg of chlorine balls, add 30 mL of reaction solvent toluene and soak in a 50 mL three-necked bottle overnight (until the chlorine balls swell);
[0030] 2), add carbohydrazide as a ligand to the result of step 1), use metal sodium as a catalyst, and stir the reaction at 90°C for 12h under nitrogen protection (rotation speed: 200rmp), wherein, carbohydrazide The reaction molar ratio with chlorine balls is 3:1;
[0031] 3), filter the resultant of step 2), wash with toluene as a reaction solvent until the washing liquid is colorless, then wash with distilled water, ethanol, acetone, and ether in turn; vacuum-dry at 50°C to constant weight to obtain Functional Chelating Resin (PS-DU).
[0032] Wherein, the chlorine balls are macroporous cross-linked chloromethylated polystyrene beads with a chlorine content of 8%.
[0033] Utilize infrared spectrum (FT-...
Embodiment 2
[0044] Chelating resin (PS-DU) prepared by embodiment 1 is used for the method of specificity reclaiming copper in cobalt ore, may further comprise the steps:
[0045] 1) Add 25ml of HAc-NaAc buffer solution with a pH value of 3.5 to 40mg PS-DU and soak for 12h;
[0046] 2) Accurately weigh 10g of a certain amount of ore sample in a 250mL beaker, add 20mL of 95% nitric acid and heat to dissolve for about 20min, then add 10mL of 90% sulfuric acid, continue heating and evaporating to emit a large amount of smoke of sulfur trioxide, drive away the nitric acid, cool Finally, add water to boil, dissolve the salts, cool, filter, and set the volume to a 250mL volumetric flask;
[0047] 3) Add 5ml of digested cobalt-copper ore mother liquor with a copper ion concentration of 1.35㎎ / ml to the obtained product of the above steps (including PS-DU after swelling + remaining acetic acid-sodium acetate buffer solution), and oscillate and absorb at room temperature until Adsorption balance, ...
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Abstract
The invention discloses a method for recycling copper from cobalt-copper ore by using chelating resin with an adsorption function. The method comprises the following steps: (1) soaking micrococcus chlorinus in a reaction solvent until the micrococcus chlorinus swells; (2) adding carbohydrazide into the substance obtained in the step (1), and stirring and reacting for 9 to 12 hours at 70 to 100 DEG C under protection of nitrogen by taking metallic sodium as a catalyst; (3) filtering the substance obtained in the step (2), washing, and drying until the weight is constant to obtain the chelating resin (PS-DU) with the adsorption function; (4) soaking the PS-DU in acetic acid-sodium acetate solution buffer solution for 12 to 14 hours; (5) weighing an ore sample, adding nitric acid, heating to dissolve and then adding sulphuric acid, continuing to heat until a large amount of sulphur trioxide is generated, cooling, boiling, filtering and metering the volume; (6) adding PS-DU into a digested mother liquid, and oscillating the mixture at a constant temperature until adsorption equilibrium; (7) washing the PS-DU in adsorption equilibrium with a buffer solution, desorbing the washed PS-DU in 10 to 15 percent of H2SO4 solution, filtering the desorbed solution, and replacing the copper from the obtained filtrate.
Description
technical field [0001] The invention relates to a chelating resin, in particular to a method in which the chelating resin with an adsorption function is used for recovering copper in cobalt-copper ore. Background technique [0002] There are many methods for the recovery and utilization of heavy metal ions in samples, including chemical precipitation, membrane separation, ion exchange resin, biosorption, and chelation adsorption material enrichment. Among the above methods, the most common is the chemical precipitation method, but this method has a good removal ability for high-concentration copper ions, but the effect is not good in low concentrations; the cost of membrane separation method is high, and the economic effect Although the ion exchange resin method overcomes the above two difficult problems, its use is also limited due to its low selectivity to metal ions; compared to the previous methods, the chelating resin has It has the unique advantages of low price, simp...
Claims
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