Preparation method of high-adsorptivity metal organic framework material

A metal-organic framework and high-adsorption technology, which is applied in the field of adsorption materials, can solve the problems of poor adsorption performance and achieve the effects of improving adsorption efficiency, reducing specific surface area, and reducing pore volume and pore size

Inactive Publication Date: 2018-08-17
万玉梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the problem of poor adsorption performance of existing metal organic framework materials, a preparation method of highly adsorbable metal organic framework materials is provided

Method used

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  • Preparation method of high-adsorptivity metal organic framework material

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example 1

[0018] In terms of parts by weight, weigh 45-50 parts of deionized water, 10-15 parts of chromium nitrate, and 1-2 parts of terephthalic acid, stir and mix them and place them in a three-necked flask, and stir and mix at 45-50°C And dropwise add 5% hydrofluoric acid until the pH reaches 5.0. After the dropwise addition is completed, stir and mix to obtain a mixed solution and put it in a reaction kettle. After reacting at 200-250°C for 6-8 hours, let it stand and cool to room temperature and placed at 1500-2000r / min to centrifuge for 10-15min, collect the lower precipitate and wash it with acetone for 3-5 times, vacuum freeze-dry and grind to pulverize, and pass through a 100-mesh sieve to obtain sieved particles; Weigh 45 to 50 parts of absolute ethanol, 10 to 15 parts of N-methylimidazole, and 6 to 8 parts of chloroethylpiperidine hydrochloride and place them in a three-necked flask, ventilate nitrogen to remove the air, and control the rate of nitrogen introduction to 45 ~5...

example 2

[0020] In terms of parts by weight, weigh 45-50 parts of deionized water, 10-15 parts of chromium nitrate, and 1-2 parts of terephthalic acid, stir and mix them and place them in a three-necked flask, and stir and mix at 45-50°C And dropwise add 5% hydrofluoric acid until the pH reaches 5.0. After the dropwise addition is completed, stir and mix to obtain a mixed solution and put it in a reaction kettle. After reacting at 200-250°C for 6-8 hours, let it stand and cool to room temperature and placed at 1500-2000r / min to centrifuge for 10-15min, collect the lower precipitate and wash it with acetone for 3-5 times, vacuum freeze-dry and grind to pulverize, and pass through a 100-mesh sieve to obtain sieved particles; Weigh 45 to 50 parts of absolute ethanol, 10 to 15 parts of N-methylimidazole, and 6 to 8 parts of chloroethylpiperidine hydrochloride and place them in a three-necked flask, ventilate nitrogen to remove the air, and control the rate of nitrogen introduction to 45 ~5...

example 3

[0022] In terms of parts by weight, weigh 45-50 parts of deionized water, 10-15 parts of chromium nitrate, and 1-2 parts of terephthalic acid, stir and mix them and place them in a three-necked flask, and stir and mix at 45-50°C And dropwise add 5% hydrofluoric acid until the pH reaches 5.0. After the dropwise addition is completed, stir and mix to obtain a mixed solution and put it in a reaction kettle. After reacting at 200-250°C for 6-8 hours, let it stand and cool to room temperature and placed at 1500-2000r / min to centrifuge for 10-15min, collect the lower precipitate and wash it with acetone for 3-5 times, vacuum freeze-dry and grind to pulverize, and pass through a 100-mesh sieve to obtain sieved particles; Weigh 45 to 50 parts of absolute ethanol, 10 to 15 parts of N-methylimidazole, and 6 to 8 parts of chloroethylpiperidine hydrochloride and place them in a three-necked flask, ventilate nitrogen to remove the air, and control the rate of nitrogen introduction to 45 ~5...

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Abstract

The invention relates to a preparation method of a high-adsorptivity metal organic framework material and belongs to the technical field of adsorption materials. Two basic functional groups are simultaneously introduced into ionic liquid to synthesize the ionic liquid with double basic sites. The preparation method disclosed by the invention is characterized in that the modified prepared ionic liquid is loaded into a material pore to enable the material pore to keep a certain crystal form structure; along with the increase of the loading capacity, modified molecules occupy the pore channel, sothat the specific surface area, the pore volume and the pore size of a matrix framework material are reduced in different degrees; and by introducing groups, the affinity of a sample to CO2 is increased. Furthermore, the high-adsorptivity metal organic framework material prepared by the technical scheme of the invention can still keep certain regeneration stability after being cyclically regenerated for many times, and is a carbon dioxide adsorbent with good application prospects.

Description

technical field [0001] The invention relates to a preparation method of a metal-organic framework material with high adsorption properties, and belongs to the technical field of adsorption materials. Background technique [0002] Metal-organic framework compounds are porous crystalline materials composed of metal ions or metal clusters linked with organic ligands. In recent years, this type of material has attracted extensive attention from researchers because of its high specific surface area and large porosity. At present, this type of material has shown good application prospects in the fields of gas storage, adsorption separation, sensing materials and catalysis. MOFs contain tunable pores ranging in size from non-porous to mesoporous. The pores in the so-called MOFs structure can be channels or cages (cages composed of micropore windows), ranging in size from micropores (pore diameter<2nm) to mesopores (2nm<pore diameter<50nm ). The pores of most of the cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/226Y02C20/40
Inventor 万玉梅蒋益
Owner 万玉梅
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