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Adsorbing material for selectively separating indium and preparation method of adsorbing material

An adsorption material and selective technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high cost, complicated operation, long time, etc., and achieve the preparation process conditions are not harsh, operation Simple, low-cost effects

Active Publication Date: 2018-10-02
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 103620070A discloses a method for recovering indium, which adopts the method of bacterial strains to recover indium. This method generally has a small amount of treatment and takes a long time, and the cost is relatively high; as mentioned in patent CN 102061398 A, it is directly used to separate Although the liquid-liquid extraction method is currently the main method for recovering indium, it has many shortcomings, such as organic phase residue, complicated operation, and serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 1000mL flask, add 50g of 50-mesh silicon dioxide and disperse it in 350mL of toluene, and add 50mL of γ-aminopropyltriethoxysilane, react at reflux for 24 hours at 70 degrees Celsius, filter, wash and dry to obtain SG- NH 2 ; will get SG-NH 2 Disperse 50g in tetrahydrofuran, add 15g of maleic anhydride, react at room temperature for 24h, filter, wash and dry to obtain SG-COOH;

[0023] Dissolve indium sulfate in dimethyl sulfoxide to prepare a solution with a mass fraction of 10%, add 10 wt% mixed solution of vinyl phosphoric acid and allyl mercaptan, and stir for 2 hours to obtain solution A. Weigh 40g of the obtained SG-COOH and add it to 150ml of solution A, then add 0.4g of ethylene glycol dimethacrylate and 0.4g of azobisisobutyronitrile, pass nitrogen and oxygen for 20min, and at 60°C, After reacting for 24 hours, polymer B was obtained; the obtained polymer A was eluted with sulfuric acid to remove indium ions, and then washed with deionized water to neutr...

Embodiment 2

[0025] In a 1000mL flask, add 50g of chromatographic silica gel and disperse it in 350mL of toluene, and add 50mL of γ-aminopropyltriethoxysilane, and reflux for 24 hours, then filter, wash and dry to obtain SG-NH 2 ; will get SG-NH 2 Disperse 50g in tetrahydrofuran, add 15g of maleic anhydride, react at room temperature for 24h, filter, wash and dry to obtain SG-COOH;

[0026] dissolving indium sulfate in dimethyl sulfoxide to prepare a solution with a mass fraction of 10%, adding 10 wt% of a mixed solution of vinyl phosphoric acid and allyl mercaptan to the solution, stirring and reacting for 2 hours at 70 degrees Celsius to obtain a solution A: Weigh 50g of the obtained SG-COOH and add it to 240ml of solution A, then add 0.5g of ethylene glycol dimethacrylate and 0.5g of azobisisobutyronitrile, pass nitrogen and exhaust oxygen for 20min, at 60°C , and reacted for 24 hours to obtain polymer A; the obtained polymer A was eluted with nitric acid to remove indium ions, and the...

Embodiment 3

[0028] In a 1000mL flask, add 50g of fly ash and disperse it in 350mL of toluene, and add 50mL of γ-aminopropyltriethoxysilane, and react under reflux for 24h, then filter, wash and dry to obtain SG-NH 2 ; will get SG-NH 2 Disperse 50g in acetic acid, add 15g of maleic anhydride, react at room temperature for 24h, filter, wash and dry to obtain SG-COOH;

[0029] Dissolve indium sulfate in dimethyl sulfoxide to prepare a solution with a mass fraction of 15%, add 10wt% vinyl phosphoric acid and vinyl mercaptan mixed solution, stir and react for 2 hours to obtain solution A; weigh 50% of the above to obtain Add SG-COOH to solution A, then add 0.5 ethylene glycol dimethacrylate and 0.5 azobisisobutyronitrile, pass nitrogen and oxygen for 20 minutes, and react at 60°C for 24 hours to obtain polymer A ; The obtained polymer A is eluted with nitric acid to remove indium ions, and then washed with deionized water to neutrality and dried to obtain this new adsorption material for sele...

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Abstract

The invention discloses an adsorbing material for selectively separating indium. The adsorbing material comprises a matrix and a functional monomer modified on the surface of the matrix and capable ofcoordinating with indium ions. The invention also discloses a preparation method of the adsorbing material for selectively separating indium. The method comprises the steps as follows: 1) the surfaceof silicon dioxide is modified with carboxyl marked as SG-COOH; 2) indium sulfate is dissolved in dimethyl sulfoxide, vinyl phosphate and allyl mercaptan are added, the mixture is stirred for a period, and a solution A is obtained; 3) the SG-COOH obtained in the step 1) is mixed with the solution A obtained in the step 2), ethylene glycol dimethacrylate and azobisisobutyronitrile are added, the mixture is subjected to a polymerization reaction under the oxygen-free condition, and a polymer B is obtained; 4) indium ions are separated from the obtained polymer B through acid pickling, the obtained material is sequentially washed with deionized water to be neutral, drying is performed, and the adsorbing material for selectively separating indium is obtained. The preparation method of the adsorbing material is simple, and the adsorption efficiency of the adsorbing material for low-concentration indium ions is high.

Description

technical field [0001] The invention belongs to the field of controlling environmental pollution and recovering rare materials, and in particular relates to an adsorption material for selectively separating indium and a preparation method thereof. Background technique [0002] Indium, as a rare element with a very low content in the earth's crust, is widely dispersed in nature. So far, no deposits with indium as an independent or main component have been found, and they all exist in other minerals in the form of impurities. However, indium and its compounds are widely used in the fields of aviation, electronics and military industry. In addition, as a heavy metal ion in aqueous solution, indium ions pose a serious threat to the environment and human health. Therefore, whether it is from the perspective of resource recycling or the removal of metal ions in aqueous solutions, the selective separation of indium ions in aqueous solutions , recycling are of great significance. ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/103B01J20/264C02F1/281C02F1/285C02F2101/20
Inventor 李敏冯建孟晓静唐思汪麒麟
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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