Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation of sephadex solid-supported brominated 1-propyl-3 methylimidazole adsorbent

A kind of technology of glucan gel, methyl imidazole

Inactive Publication Date: 2015-06-17
UNIV OF JINAN
View PDF8 Cites 1 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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, add azobisisobutyronitrile: 0.5g, keep stirring at 70°C for 28 hours, after cooling, f...

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 36h, 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, filt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
clearance rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for a sephadex solid-supported brominated 1-propyl-3 methylimidazole adsorbent. The preparation method is characterized by comprising the following steps: performing sulfhydrylation on activated sephadex by mercaptoacetic acid; then adding the following components in percentage by mass into a reactor: 55-65 percent of acetonitrile, 5-12 percent of brominated 1-propyl-3 methylimidazole, 28-38 percent of sulfydryl sephadex, 0.5-2 percent of azodiisobutyronitrile to obtain a mixture, wherein all the component percentage sum is 100 percent; keeping the temperature of 70-80 DEG C, stirring, reacting for 25-28 hours, performing cooling and suction filtration, washing the mixture by deionized water until the filtrate is neutral, washing the filtrate by a small amount of ethyl alcohol, and drying the filtrate in a vacuum drying box with the temperature of 50 DEG C to obtain the sephadex solid-supported brominated 1-propyl-3 methylimidazole adsorbent. The adsorbent is extremely high in adsorption capacity to arsenic and chromium, high in physical and chemical stability, high in mechanical performance, high in regeneration capacity, low in cost and environmentally friendly, and the number of repeated use times is large.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62C02F1/58
Inventor 李冬梅李慧芝许崇娟
Owner UNIV OF JINAN