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Preparation of cobalt-based metal organic framework material and low-carbon hydrocarbon separation application of cobalt-based metal organic framework material

A cobalt-based, organic ligand technology, applied in cobalt organic compounds, organic chemistry, organic chemistry methods, etc., can solve the problems of high energy consumption, large equipment investment, long time consumption, etc., and achieve good application prospects and high thermal stability. Effect

Active Publication Date: 2021-08-06
BEIJING UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

Traditional gas separation methods such as cryogenic distillation and solvent absorption often have disadvantages such as high energy consumption, long time consumption, and large equipment investment.

Method used

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  • Preparation of cobalt-based metal organic framework material and low-carbon hydrocarbon separation application of cobalt-based metal organic framework material
  • Preparation of cobalt-based metal organic framework material and low-carbon hydrocarbon separation application of cobalt-based metal organic framework material
  • Preparation of cobalt-based metal organic framework material and low-carbon hydrocarbon separation application of cobalt-based metal organic framework material

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Experimental program
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example 1

[0020] Example 1: (Co-DPBP)

[0021] Step 1: Weigh 5.76mg DPBP organic ligand, 10.62mg cobalt acetate, dissolve in 3mL N,N-dimethylformamide (DMF), 2mL tetrahydrofuran (THF) and 1mL deionized water, add 0.2mL acetic acid Put it into a 20mL glass reaction bottle, put the glass bottle into a polytetrafluoroethylene liner, and seal it with a stainless steel reaction kettle. Reacted in an oven at 160°C for 48h to obtain a Co-DPBP crystal sample.

[0022] Step 2: Select a single crystal sample with a suitable size and good crystallinity, collect diffraction data with a single crystal diffractometer at 298K, and then use the structure analysis software Olex2 to refine and obtain the crystal structure. See the accompanying drawings for the specific structure. Sample purity was confirmed by X-ray powder diffraction techniques.

[0023] Step 3: In order to remove solvent molecules in the pores of the material, the crystalline sample obtained above was washed with DMF solvent and the...

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Abstract

The invention discloses preparation of a cobalt-based metal organic framework material and a low-carbon hydrocarbon separation application of the cobalt-based metal organic framework material, and belongs to the technical field of crystalline porous material preparation and gas separation. The MOF material is synthesized from an organic ligand 5,5'-bis(1H-pyrazol-4-yl)-2,2'-dipyridyl (DPBP) and cobalt acetate (Co(CH3COO)2) under a solvothermal condition. Co-DPBP has a regular pore channel structure and relatively high porosity and specific surface area. The size of a pore channel is slightly larger than the molecular dynamic diameter of propyne / propylene, and the pore channel contains abundant bare metal sites and hydrogen bond action sites. The acting force between the Co-DPBP skeleton and propyne molecules is stronger, so that the effect of preferentially adsorbing the propyne in the propyne-propylene mixed gas is realized, and the propylene component in the mixed gas is purified.

Description

technical field [0001] The invention belongs to the technical field of crystalline porous material preparation and gas separation, and relates to a preparation method and application of a novel cobalt-based metal organic framework material (Metal organic frameworks, MOF). The MOF material has a microporous structure and can realize propyne , Propylene gas separation. Background technique [0002] The separation and purification of low-carbon hydrocarbons is of great significance in the petrochemical field. Alkenes and alkynes with the same carbon number have similar structures and physicochemical properties, making their separation challenging. Traditional gas separation methods such as cryogenic rectification and solvent absorption often have disadvantages such as high energy consumption, long time consumption, and large equipment investment. The physical adsorption separation method is easy to operate, has high separation selectivity and low energy consumption, and does ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C07F15/06B01J20/22B01J20/30C07C7/12C07C11/06C07C11/22
CPCC08G83/008C07F15/065B01J20/226C07C7/12C07B2200/13B01J2220/4812C07C11/06C07C11/22Y02P20/151
Inventor 陈强赵砚珑芦世东王昊天谢亚勃李建荣
Owner BEIJING UNIV OF TECH
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