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Preparation method of TNT@Cu-BTC composite adsorbent and application of TNT@Cu-BTC composite adsorbent in cyclohexane adsorption

A composite adsorption, reaction kettle technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve problems such as poor water resistance and insufficient pore volume utilization.

Active Publication Date: 2020-12-04
安徽晨泽知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the existing technical problems, the purpose of the present invention is to provide a preparation method of TNT@Cu-BTC composite adsorbent and its application in cyclohexane adsorption, aiming at the insufficient utilization of pore volume and water resistance during gas adsorption. Poor performance and other problems, the use of hydrophobically modified TiO 2 Nanotubes (TNT) are doped to simultaneously increase the pore volume and hydrophobic properties of the material

Method used

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  • Preparation method of TNT@Cu-BTC composite adsorbent and application of TNT@Cu-BTC composite adsorbent in cyclohexane adsorption
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Embodiment 1

[0024] A preparation method of TNT@Cu-BTC composite adsorbent, comprising the following steps:

[0025] (1) Adding Cu(NO 3 ) 2 ·3H 2 O, Trimellitic acid (H 3 BTC) and hydrophobically modified TiO 2 Add nanotubes (TNT) into a mixed solution of dimethylformamide (DMF), ethanol and deionized water at a mass ratio of 2:1:0.05, stir evenly and transfer the mixed solution to a polytetrafluoroethylene-lined reactor ;TiO 2 The method for hydrophobic modification of nanotubes (TNT) is that TNT is added to silane ethanol solution for ultrasonic vibration, and then distilled water is added for hydrolysis reaction.

[0026] (2) Cover and seal the stainless steel reaction kettle in step (1) and transfer it to a homogeneous reactor, and react at 85°C and 300r / min for 20h. The purpose of using a homogeneous reactor is to ensure sufficient contact between materials .

[0027] (3) The product obtained in step (2) is cooled and then centrifuged and washed to obtain a blue solid precipita...

Embodiment 2

[0029] A preparation method of TNT@Cu-BTC composite adsorbent, comprising the following steps:

[0030] (1) Adding Cu(NO 3 ) 2 ·3H 2 O, Trimellitic acid (H 3 BTC) and hydrophobically modified TiO 2 Add nanotubes (TNT) into a mixed solution of dimethylformamide (DMF), ethanol and deionized water at a mass ratio of 2:1:0.10, stir evenly and transfer the mixed solution to a polytetrafluoroethylene-lined reactor ;TiO 2 The method for hydrophobic modification of nanotubes (TNT) is that TNT is added to silane ethanol solution for ultrasonic vibration, and then distilled water is added for hydrolysis reaction.

[0031] (2) Cover and seal the stainless steel reaction kettle in step (1) and transfer it to a homogeneous reactor, and react at 85°C and 300r / min for 20h. The purpose of using a homogeneous reactor is to ensure sufficient contact between materials .

[0032] (3) The product obtained in step (2) is cooled and then centrifuged and washed to obtain a blue solid precipitate...

Embodiment 3

[0034] A preparation method of TNT@Cu-BTC composite adsorbent, comprising the following steps:

[0035] (1) Adding Cu(NO 3 ) 2 ·3H 2 O, Trimellitic acid (H 3 BTC) and hydrophobically modified TiO 2 Add nanotubes (TNT) into a mixed solution of dimethylformamide (DMF), ethanol and deionized water at a mass ratio of 2:1:0.15, stir evenly and transfer the mixed solution to a polytetrafluoroethylene-lined reactor ;TiO 2 The method for hydrophobic modification of nanotubes (TNT) is that TNT is added to silane ethanol solution for ultrasonic vibration, and then distilled water is added for hydrolysis reaction.

[0036] (2) Cover and seal the stainless steel reaction kettle in step (1) and transfer it to a homogeneous reactor, and react at 85°C and 300r / min for 20h. The purpose of using a homogeneous reactor is to ensure sufficient contact between materials .

[0037] (3) The product obtained in step (2) is cooled and then centrifuged and washed to obtain a blue solid precipita...

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Abstract

The invention discloses a preparation method of a TNT@CuBTC composite adsorbent and an application of the TNT@CuBTC composite adsorbent in cyclohexane adsorption. The preparation method comprises: dissolving Cu(NO3)2.3H2O, trimesic acid (H3BTC) and the hydrophobically modified TiO2 nanotube in a mixed solution of dimethylformamide, ethanol and deionized water according to a certain proportion, placing the mixture in a polytetrafluoroethylene lining reaction kettle after being evenly stirred, carrying out a reaction process for 20 h at the temperature of 85 DEG C, cooling after the reaction iscompleted, washing a product, and drying and activating with DMF and ethanol, so that TiO2 nanotube doped Cu-BTC is obtained. Adsorption sites can be increased by increasing the pore volume, structural defects, unsaturated coordinated Cu centers and the like of the Cu-BTC adsorbent, the selective adsorption capacity of the material to cyclohexane in organic waste gas is improved, and meanwhile, the water resistance of the material can be improved through hydrophobic modification.

Description

technical field [0001] The invention belongs to the technical field of organic waste gas separation, and in particular relates to a preparation method of a TNT@Cu-BTC composite adsorbent and its application in cyclohexane adsorption. Background technique [0002] In the past few decades, due to the development, storage, refining, transportation and use of fossil fuels, the amount of volatile organic compounds (VOCs) has been increasing, which seriously threatens human health and the ecological environment. Cyclohexane is a common component in VOCs, and the adsorption method is considered to be a promising treatment technology because it can realize the recovery and reuse of cyclohexane while reducing emissions. The development of adsorbent materials with high selectivity, adsorption capacity and stability is crucial to the industrialization of adsorbents. While looking for alternative clean energy sources, it is still necessary to develop new adsorbents to separate VOCs, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01J20/226B01J20/06B01D53/02B01D2257/708B01D2257/7022B01D2253/1124B01D2253/204
Inventor 宋夫交许琦岳仁亮吴傲立齐丛亮严金龙杨百忍曹燕
Owner 安徽晨泽知识产权服务有限公司