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A sponge composite metal organic framework material for adsorption and separation

An organic framework and composite metal technology, applied in the field of materials, can solve the problems of easy loss of MOFs powder, hinder industrial application, and easy agglomeration, and achieve the effects of mild conditions, enhanced interaction force, and high loading rate

Active Publication Date: 2020-11-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that MOFs powders are easy to lose and easy to agglomerate and hinder practical industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A sponge composite metal organic framework material for adsorption and separation, the specific preparation method of which is:

[0020] In the first step, 0.33g metal salt CuSiF 6 ·H 2 O was dissolved in 10.00g methanol to obtain solution 1; 0.30g pyrazine was dissolved in 10.0g methanol to obtain solution 2;

[0021] In the second step, 1 g of polyvinyl alcohol (PVA) aqueous solution with a mass fraction of 5% is added to 9.00 g of absolute ethanol; 0.17 g of melamine foam is immersed in this mixed solution for pretreatment for 2 hours, and dried at 323 K to obtain a melamine foam carrier ;

[0022] In the third step, the melamine foam carrier obtained in the second step is poured into solution 1 to soak, and dried at a temperature of 328K with a rotary evaporator for 2 hours, and then the soaked and dried melamine foam carrier is poured into solution 2 for soaking, and then soaked at a temperature of 328K. The in-situ growth reaction was carried out for 12 hours, ...

Embodiment 2

[0038] A sponge composite metal organic framework material for adsorption and separation, the specific preparation method of which is:

[0039] In the first step, 0.45g metal salt CuSiF 6 ·H 2 O was dissolved in 10.50g methanol to obtain solution 1; 0.40g pyrazine was dissolved in 10.50g methanol to obtain solution 2;

[0040] In the second step, 1.20 g of polyvinyl alcohol (PVA) aqueous solution with a mass fraction of 5% was added to 9.50 g of absolute ethanol. Immerse 0.17g of melamine foam in this mixed solution for pretreatment for 2 hours, and dry at 333K to obtain a melamine foam carrier;

[0041] In the third step, the melamine foam carrier obtained in the second step is poured into solution 1 for soaking, and dried at a temperature of 333K with a rotary evaporator for 2 hours, and then the soaked and dried melamine foam carrier is poured into solution 2 for soaking, and then soaked at a temperature of 333K. Under the in-situ growth reaction for 20 hours, and then d...

Embodiment 3

[0056] A sponge composite metal organic framework material for adsorption and separation, the specific preparation method of which is:

[0057] In the first step, 0.65g metal salt CuSiF 6 ·H 2 O was dissolved in 11.00 g of methanol to obtain solution 1; 0.60 g of pyrazine was dissolved in 11.00 g of methanol to obtain solution 2;

[0058] In the second step, 2.00 g of polyvinyl alcohol (PVA) aqueous solution with a mass fraction of 5% was added to 9.00 g of absolute ethanol. Immerse 0.17g of melamine foam in this mixed solution for pretreatment for 3 hours, and dry at a temperature of 338K to obtain a melamine foam carrier;

[0059] In the third step, the melamine foam carrier obtained in the second step is poured into solution 1 to soak, and dried at a temperature of 343K with a rotary evaporator for 3 hours, and then the soaked and dried melamine foam carrier is poured into solution 2 for soaking, and then soaked at a temperature of 343K. Under the in-situ growth reaction...

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Abstract

The invention relates to a sponge composite metallic organic framework material for adsorption separation and belongs to the technical field of materials. According to the invention, a two-step in-situ growth method is adopted for loading MOFs (metallic organic framework material) into a duct in a sponge carrier. The MOFs is synthesized from following organic ligands and metal salts, wherein the organic ligands include pyrazine, trimesic acid, terephthalic acid, 2,5-dihydroxyterephthalic acid, and the metal salts include cupric fluosilicate, magnesium nitrate, zirconium chloride, cupric nitrate, chromic nitrate, ferric nitrate, aluminum nitrate and hydrates thereof. According to a preparation method provided by the invention, a large amount of MOFs loaded in the duct in the sponge carriercan be realized; MOFs load rate is high; load is stable; the defects of fragility and easiness in loss of MOFs powder can be overcome; a breakthrough experiment proves that the material provided by the invention has the characteristics of high CO2-absorbing capacity, high adsorption separation selectivity, stable adsorption separation property, and the like.

Description

technical field [0001] The invention relates to a sponge composite metal organic framework material used for adsorption and separation, and belongs to the technical field of materials. Background technique [0002] As a porous material with rich specific surface area, regular channels, adjustable window size, and a large number of active sites, metal-organic frameworks (MOFs) have very broad application prospects for adsorption and separation. But its crystal size is micron level, and it is in powder state. This kind of powder is easy to lose and cause pipeline blockage, and easy to agglomerate to affect the mass transfer in the adsorption process. This hinders the practical application of MOFs. In order to apply MOFs materials in the process of fixed bed adsorption separation, to realize the CO reduction in closed space and industrial production 2 Gas capture, invention of such composite materials and preparation methods. Contents of the invention [0003] The purpose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01D53/02
CPCB01D53/02B01D2257/504B01J20/226B01J20/262Y02C20/40
Inventor 赵之平甄红刚蔡玮玮
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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