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Two fluorinated metal organic framework materials and preparation and low-carbon hydrocarbon separation application thereof

A technology of copper fluoride and organic ligands, applied in the direction of adsorption purification/separation, organic chemistry, separation methods, etc., can solve the problems of high energy consumption and low selectivity, and achieve reduced energy consumption, low price, and enhanced force Effect

Active Publication Date: 2020-04-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkenes and alkynes with the same carbon number have similar structures and physical and chemical properties, and there are only small differences in unsaturation, which makes traditional gas separation processes, such as cryogenic distillation and solvent absorption, have low selectivity and high energy consumption. Inadequacies

Method used

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  • Two fluorinated metal organic framework materials and preparation and low-carbon hydrocarbon separation application thereof
  • Two fluorinated metal organic framework materials and preparation and low-carbon hydrocarbon separation application thereof
  • Two fluorinated metal organic framework materials and preparation and low-carbon hydrocarbon separation application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: (Cu-FINA-1)

[0029] The first step: Weigh 10 mg of 3-fluoroisonicotinic acid organic ligand and 12 mg of copper nitrate, and dissolve them in 5 mL of N,N-dimethylformamide (DMF). After sonicating and obtaining a homogeneous solution, it was then transferred to a 20 mL glass reaction flask and reacted at 90° C. for 96 hours to obtain the Cu-FINA-1 crystalline sample with a yield of 60% (calculated based on the metal salt).

[0030] The second step: select a single crystal sample with suitable size and good crystallinity, collect the diffraction data with a single crystal diffractometer at 298K, and then refine the crystal structure by using the relevant structure analysis software Olex2. See the attached drawings for the specific structure. The purity of the whole prepared sample was confirmed by X-ray powder diffraction technique.

[0031] Step 3: In order to remove the solvent molecules in the pores of the material, the crystalline sample obtained above was wash...

Embodiment 2

[0038] Example 2: (Cu-FINA-2)

[0039] Step 1: Weigh 10mg 3-fluoroisonicotinic acid organic ligand and 12mg copper nitrate, and dissolve them in a mixed solvent of 2mL N,N-dimethylacetamide (DMA), 2mL acetonitrile, 0.1mL acetic acid and 2mL water . After sonicating and obtaining a homogeneous solution, it was then transferred to a 20 mL glass reaction flask and reacted at 90° C. for 96 hours to obtain the Cu-FINA-2 crystalline sample with a yield of 50% (calculated based on the metal salt).

[0040] The second step: select a single crystal sample with suitable size and good crystallinity, collect the diffraction data with a single crystal diffractometer at 298K, and then refine the crystal structure by using the relevant structure analysis software Olex2. See the attached drawings for the specific structure. The purity of the whole prepared sample was confirmed by X-ray powder diffraction technique.

[0041] The third step: In order to remove the solvent molecules in the pores of ...

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Abstract

The invention discloses two fluorinated metal organic framework materials, preparation and low-carbon hydrocarbon separation application thereof, and belongs to the technical field of crystalline porous material preparation and gas separation. The two microporous copper-based MOF materials are formed by a cheap and easily available multi-coordination organic ligand 3-fluoroisonicotinic acid (FINA)and copper nitrate under different solvothermal conditions. The two MOF crystal structures have high porosity and have regular one-dimensional channels, the size of the channels is slightly larger than the molecular dynamics size of low-carbon hydrocarbon, and a structural basis is provided for adsorption separation of the low-carbon hydrocarbon gas molecules. Besides, hydrogen bond interaction sites exist in the pore channels, and alkyne molecules with smaller kinetic sizes can enter the pore channels easily after the pore channels are cut by fluorine atoms, and the acting force between alkyne gas molecules and the framework is enhanced so that the effect of preferentially adsorbing acetylene gas in acetylene-ethylene mixed gas and preferentially adsorbing propyne in propyne-propylene mixed gas is achieved, ethylene and propylene components in the mixed gas are purified, and the energy consumption in the separation process is reduced.

Description

Technical field [0001] The invention belongs to the technical field of crystalline porous material preparation and gas separation, and specifically relates to a synthetic preparation method of two fluorinated metal organic frameworks (MOF). The feature is that the two MOF materials can achieve acetylene / ethylene mixed gas Purification of ethylene, purification of propylene in propyne / propylene mixed gas. Background technique [0002] Low-carbon hydrocarbons are important basic raw materials for petrochemical industries, and the efficient separation of olefins and alkynes is one of the key processes for the sustainable development of the petrochemical industry. Alkenes and alkynes molecules with the same carbon number have similar structures and physical and chemical properties, with only minor differences in unsaturation, making traditional gas separation processes, such as cryogenic distillation and solvent absorption, have low selectivity and high energy consumption. Shortcomi...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01J20/28B01J20/30B01D53/02C07C7/12C07C11/04C07C11/06
CPCC08G83/008B01J20/226B01J20/28095B01D53/02C07C7/12C07C11/04C07C11/06
Inventor 李建荣张鹏丹伍学谦谢亚勃
Owner BEIJING UNIV OF TECH
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