Preparation method and gas separation application of copper-based microporous metal organic framework material

A metal-organic framework and organic ligand technology are applied in the field of preparation of copper-based microporous metal-organic framework materials to achieve the effects of strengthening force and reducing energy consumption

Active Publication Date: 2020-03-31
BEIJING UNIV OF TECH
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Problems solved by technology

However, the number of ethane-preferential MOFs adsorbents with lower energy consumption is relatively small, and their design and preparation are more challenging.

Method used

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  • Preparation method and gas separation application of copper-based microporous metal organic framework material
  • Preparation method and gas separation application of copper-based microporous metal organic framework material
  • Preparation method and gas separation application of copper-based microporous metal organic framework material

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Embodiment 1

[0023] Step 1: Weigh 10mg of 3-hydroxyisonicotinic acid organic ligand, 45mg of anhydrous copper acetate, dissolve in 15mL of N,N-dimethylformamide (DMF) and 1mL of water. After sonicating and obtaining a homogeneous solution, it was then transferred into a 20mL glass reaction bottle, and subjected to a constant temperature reaction at 90°C for 96h to obtain the Cu-MOF crystalline sample with a yield of 60% (calculated based on the metal salt).

[0024] Step 2: Select a single crystal sample with a suitable size and good crystallization, collect diffraction data with a single crystal diffractometer at 250K, and then use the relevant structure analysis software Olex2 to refine and obtain the crystal structure. See the accompanying drawings for the specific structure. The purity of the bulk prepared samples was confirmed by X-ray powder diffraction techniques.

[0025] Step 3: In order to remove the solvent molecules in the pores of the material, the crystalline sample obtained...

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Abstract

The invention discloses a preparation method and gas separation application of a copper-based microporous metal organic framework material, and belongs to the technical field of crystalline porous material preparation and gas separation. The material is prepared from an organic ligand 3-hydroxyisonicotinic acid (3-OH-INA) and copper acetate under a solvothermal condition, wherein the organic ligand 3-hydroxyisonicotinic acid (3-OH-INA) is simple in structure, low in price, easy to obtain and rich in coordination mode. A unique zigzag one-dimensional channel exists in the Cu-MOF structure, thesize of the channel is slightly larger than the dynamics size of a low-carbon hydrocarbon molecule, and a structural basis is provided for the adsorption process of the gas. Besides, the ligands regularly arranged in the pore channels provide multiple hydrogen bond interaction sites, and the acting force between ethane gas molecules and a framework is enhanced, so that the effect of preferentiallyadsorbing ethane gas in ethane-ethylene mixed gas is achieved, the ethylene purification task is completed in one adsorption period, and the energy consumption in the separation process is further reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of crystalline porous materials and gas separation, and specifically relates to a preparation method of copper-based microporous metal organic frameworks (Metal organic frameworks, MOF). Efficient separation and purification of ethane mixed gas. Background technique [0002] Ethylene gas is an important basic raw material for the production of synthetic fibers, synthetic rubber, and synthetic plastics in the synthetic industry, and it is also one of the chemical products with the largest output in the world. As the core product of the petroleum industry, the output of ethylene is also regarded as one of the symbols of a country's petrochemical development level. The production of ethylene mainly depends on the petroleum fractionation and cracking process, and the ethylene product obtained through this process often contains ethane impurity gas. Since the physical and chemical properties (mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01J20/22B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01J20/226B01J20/28095C08G83/008
Inventor 李建荣伍学谦张鹏丹谢亚勃
Owner BEIJING UNIV OF TECH
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