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Preparation of 1-Propyl-3 Methylimidazole Bromide Adsorbent Immobilized on Sephadex

A technology of dextran gel and methylimidazole, which is applied in the field of preparation of biosorbents, can solve problems such as threats to the ecological environment and human health, and achieve excellent mechanical strength, low energy consumption, and good desorption performance

Inactive Publication Date: 2017-01-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with Cr(Ⅲ), Cr(Ⅵ) has stronger carcinogenic and mutagenic ability, and its toxicity is more than 100 times that of Cr(Ⅲ). At the same time, Cr(Ⅵ) has strong oxidation ability and migration ability, pose a serious threat to the ecological environment and human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Sephadex activation treatment: pre-swelled and washed dextran gel several times in 2mol / L hydrochloric acid solution, soaked at room temperature for 36 hours, washed with deionized water until neutral, and dried at 80°C after suction filtration , to obtain activated dextran gel;

[0023] (2) Mercaptodextran gel: In a stoppered Erlenmeyer flask, add thioglycolic acid: 35mL, tetrahydrofuran: 42mL, activated dextran gel: 23g, concentrated sulfuric acid: 0.5mL, stopper, at 55°C Reflux for 5 h under stirring, then wash with deionized water, suction filter until the filtrate is neutral, wash with a small amount of ethanol, and dry in an oven at 35°C to obtain mercaptodextran gel.

[0024] (3) Preparation of dextran gel immobilized 1-propyl-3 methylimidazole bromide adsorbent: In the reactor, add acetonitrile: 63mL, 1-propyl-3 methylimidazole bromide: 10g, 29g of mercaptodextran gel, add azobisisobutyronitrile: 1g, keep stirring at 75°C, and react for 27 hours. After cool...

Embodiment 2

[0026] (1) Sephadex activation treatment: pre-swelled and washed dextran gel several times in 2mol / L hydrochloric acid solution, soaked at room temperature for 36 hours, washed with deionized water until neutral, and dried at 80°C after suction filtration , to obtain activated dextran gel;

[0027] (2) Mercaptodextran gel: In a stoppered Erlenmeyer flask, add thioglycolic acid: 30mL, tetrahydrofuran: 45mL, activated dextran gel: 26g, concentrated sulfuric acid: 0.2mL, stopper, at 50°C reflux with stirring for 6 hours, then wash with deionized water, suction filter until the filtrate is neutral, wash with a small amount of ethanol, and dry in an oven at 35°C to obtain mercaptodextran gel.

[0028] (3) Preparation of dextran gel immobilized 1-propyl-3 methylimidazole bromide adsorbent: In the reactor, add acetonitrile: 58mL, 1-propyl-3 methylimidazole bromide: 12g, 32g of mercaptodextran gel, then add azobisisobutyronitrile: 0.5g, keep stirring at 70°C for 28 hours, react with ...

Embodiment 3

[0030] (1) Sephadex activation treatment: pre-swelled and washed dextran gel several times in 2mol / L hydrochloric acid solution, soaked at room temperature for 36 hours, washed with deionized water until neutral, and dried at 80°C after suction filtration , to obtain activated dextran gel;

[0031] (2) Mercaptodextran gel: In a stoppered Erlenmeyer flask, add thioglycolic acid: 40mL, tetrahydrofuran: 40mL, activated dextran gel: 20g, concentrated sulfuric acid: 0.3mL, stopper, at 60°C reflux with stirring for 4 hours, then wash with deionized water, suction filter until the filtrate is neutral, wash with a small amount of ethanol, and dry in an oven at 35°C to obtain mercaptodextran gel.

[0032] (3) Preparation of dextran gel immobilized 1-propyl-3 methylimidazole bromide adsorbent: In the reactor, add acetonitrile: 68mL, 1-propyl-3 methylimidazole bromide: 5g, 28g of mercaptodextran gel, add azobisisobutyronitrile: 2g, keep stirring at 80°C, and react for 25h. After cooling, ...

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Abstract

The invention discloses a preparation method of a dextran gel immobilized bromide 1-propyl-3 methylimidazole adsorbent, which is characterized in that the activated dextran gel is mercaptolated by using thioglycolic acid; In the reactor, add according to the mass percentage of the following composition, acetonitrile: 55~65%, 1-propyl-3 methylimidazole bromide: 5~12%, mercaptodextran gel 28~38%, and then add azo Diisobutyronitrile: 0.5~2%, the sum of each component is 100%, keep the temperature at 70~80℃, stir, react for 25~28 hours, after cooling, filter with suction, wash with deionized water until the filtrate is neutral After being washed with a small amount of ethanol, it was dried in a vacuum oven at 50°C to obtain a Sephadex gel immobilized with 1‑propyl‑3 methylimidazole bromide adsorbent. The adsorbent has high adsorption capacity for arsenic and chromium, excellent physical and chemical stability, mechanical properties, strong regeneration ability, many times of repeated use, low cost and environmental protection.

Description

technical field [0001] The invention relates to the technical field of a preparation method of a biosorbent, in particular to a preparation method of a dextran gel-immobilized 1-propyl-3 methylimidazole bromide adsorbent and the method for treating pentavalent arsenic and hexavalent arsenic in water. Application technology of chromium adsorption. Background technique [0002] Dextran gel is a polymer compound with a porous three-dimensional space network structure. It is a soft gel, and its micropores can absorb a large amount of solvent. The gel has good swelling performance and is widely used in the separation of proteins, nucleic acids, enzymes and polysaccharides in biochemistry. It is an indispensable medium for the separation and purification of biological macromolecules. The separation basis is to sieve according to the molecular volume of these substances in the solution, and the dextran gel acts as a molecular sieve. However, the concentration effect of dextran ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62C02F1/58
Inventor 李冬梅李慧芝许崇娟
Owner UNIV OF JINAN
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