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A metal-organic framework material for efficient carbon dioxide/nitrogen selective separation and adsorption and its preparation method

A technology of metal-organic frameworks and organic ligands, applied in the field of gas adsorption and separation systems, can solve the problems of high cost of repeated use, difficult pore size/window size adjustment, etc., and achieve low cost of repeated use and ultra-high selectivity Separation adsorption performance, porosity enhancement effect

Active Publication Date: 2018-08-28
ZHEJIANG UNIV
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Problems solved by technology

The former can relatively easily reach higher CO 2 / N 2 Selective separation and adsorption, but there is a disadvantage of high cost of repeated use, which can be well avoided by the latter
However, it is difficult for physical adsorption to adjust the pore size / window size just right, so it is difficult to realize high-efficiency CO 2 / N 2 Bottleneck in selective separation and adsorption

Method used

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  • A metal-organic framework material for efficient carbon dioxide/nitrogen selective separation and adsorption and its preparation method
  • A metal-organic framework material for efficient carbon dioxide/nitrogen selective separation and adsorption and its preparation method
  • A metal-organic framework material for efficient carbon dioxide/nitrogen selective separation and adsorption and its preparation method

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[0027] Example: (1) Using cross-coupling reaction, 11.87g, 40mmol of 3,5-dibromoaniline, 9mL, 100mmol of ethyl acrylate, 10.35g, 75mmol of anhydrous potassium carbonate, 3.22g, 10mmol of tetrabutyl Ammonium bromide and 1.122g, 5mmol of palladium acetate (catalyst) were uniformly dissolved in 100mL of DMF according to the set stoichiometric ratio, reacted for 1 to 2 days under stirring conditions at 130°C, and were extracted by ethyl acetate and water multiple times , dried over anhydrous magnesium sulfate, chromatographic purification and subsequent hydrolysis to obtain organic ligand 5-amino-1,3-benzenediacrylic acid with high chemical purity.

[0028] (2) Using solvothermal method, 8 mg, 0.014 mmol of organic ligand 5-amino-1,3-benzenediacrylic acid and 15.0 mg, 0.051 mmol of metal salt Zn(NO 3 ) 2 ·6H 2 O in solvent (DMF:H 2 O: acetonitrile, 2mL / 4mL / 7mL) was ultrasonically oscillated for five minutes until uniformly dissolved, and reacted at 80°C for 1 day to obtain a ho...

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Abstract

The invention discloses a metal-organic framework material for efficient CO2 / N2 selective separation and adsorption and a preparation method of the metal-organic framework material. The preparation method of the metal-organic framework material comprises steps as follows: firstly, organic ligands are obtained through cross coupling reaction, secondly, a homogeneous-phase crystal material is obtained with a solvent thermal method, thirdly, repeated solvent exchange is performed with anhydrous acetone with a lower boiling point, and finally, solvent molecules in holes of the material are removed in a higher vacuum state, so that the activated crystal material is obtained. The material realizes zero adsorption of N2 for the first time, has high CO2 / N2 selective separation and adsorption performance and lower isothermal adsorption enthalpy and is low in reuse cost; besides, the material has excellent chemical stability and heat stability, greatly meets multi-aspect requirements for the CO2 / N2 selective separation and adsorption material in the actual application field, and has great application prospect in the field of CO2 / N2 selective separation and adsorption and in the aspect of relieve of greenhouse effect.

Description

technical field [0001] The invention belongs to the preparation of a gas adsorption and separation system, in particular to a highly stable metal-organic framework material and a preparation method thereof, which can be used for high-efficiency CO 2 / N 2 Selective separation and adsorption. Background technique [0002] With the development of science and technology and the improvement of human living standards, human demand for fossil energy is increasing, which brings serious energy crisis and environmental pollution. One of the main manifestations of environmental pollution is the greenhouse effect. Since the industrial revolution, the carbon dioxide and other heat-absorbing greenhouse gases that humans have emitted into the atmosphere have increased year by year, and the greenhouse effect of the atmosphere has also increased, which has caused a series of serious problems such as global warming, and has aroused the attention of countries all over the world. s concern. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F3/06B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01J20/223C07F3/003C07F3/06Y02C20/40Y02P20/151
Inventor 钱国栋张玲姜珂杨雨崔元靖
Owner ZHEJIANG UNIV
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