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Homogeneous metal organic framework material as well as preparation method and application thereof

A metal-organic framework and organic ligand technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high production cost and application prospects to be observed, and achieve low cost, low reuse cost, and low isothermal adsorption. The effect of enthalpy

Inactive Publication Date: 2018-02-27
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the cryogenic separation method is suitable for large-scale refineries or places where refineries are concentrated; the membrane separation method is simple, but the production cost is high, and it still needs to be continuously developed and optimized for industrial application; the hydrate separation method is a relatively new separation method that has emerged , the application prospect remains to be seen

Method used

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  • Homogeneous metal organic framework material as well as preparation method and application thereof
  • Homogeneous metal organic framework material as well as preparation method and application thereof
  • Homogeneous metal organic framework material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] This embodiment relates to a preparation method of N,N'-bis(3,5-dicarboxybenzene)-1,4,5,8-naphthalimide organic ligand, which specifically includes the following steps:

[0032] 1.81g of 5-amino-isophthalic acid and 1.34g of 1,4,5,8-naphthalenetetracarboxylic anhydride were added to 25mL of glacial acetic acid solution, reacted at 120°C for 15 hours, and after cooling to room temperature, Filter, collect the precipitate, wash with distilled water until the pH of the washing liquid is neutral, and dry at 80°C under vacuum for 12 hours to obtain N,N'-bis(3,5-dicarboxybenzene)-1,4,5, 8-naphthalimide organic ligand 2.4g, the yield is 77%.

Embodiment 2

[0034] This embodiment relates to a method for preparing a homogeneous Cu-organic framework, which specifically includes the following steps:

[0035] 30mg of N,N'-bis(3,5-dicarboxybenzene)-1,4,5,8-naphthalimide obtained in Example 1 and 36mg of Cu(NO 3 ) 2 ·3H 2 O is soluble in N,N'-dimethylformamide (DMF) / dioxane / H 2 O (5mL, volume ratio is 3:1:1) mixed solvent, then add 80μL of concentrated HCl, place it in a 20mL bacterial seed bottle, seal it and put it in a 80℃ oven to react for 72h, take it out and wash it repeatedly with DMF , The optical microscope showed a square green crystal, which is the prepared Cu-organic framework material. Its structure is determined by Agilent Technologies SuperNova single crystal diffractometer. The test results show that the crystal structure is [Cu 2 (C 30 H 10 N 2 O 12 )(H 2 O) 2 ](C 3 H 7 NO) 5 (H 2 O) 3 , Belongs to tetragonal crystal system, space group is P42 1 2. The unit cell parameters are α=β=γ=90°, the unit cell volume is Z=8, D c ...

Embodiment 3

[0050] This embodiment relates to a method for preparing a homogeneous Co-organic framework, which specifically includes the following steps:

[0051] The 30mg of N,N'-bis(3,5-dicarboxybenzene)-1,4,5,8-naphthalimide obtained in Example 1 and 45mg of Co(NO 3 ) 2 ·6H 2 O is soluble in N,N'-diethylformamide (DEF) / methanol / H 2 O (5mL, volume ratio: 3:1:1) mixed solvent, then add 80μL of concentrated HCl, place it in a 20mL bacterial seed bottle, seal it and put it in a 80℃ oven to react 72, take it out and repeatedly wash with DEF , Get the metal organic frame material.

[0052] The metal-organic framework material obtained in this example was solvent exchanged with anhydrous acetone. The solvent was exchanged every half an hour, at least ten times, and then activated under vacuum and 25°C for 12 hours, and then activated at 100°C In 12 hours, a metal organic framework material with unsaturated metal sites and open channels was obtained. The MicromeriticsASAP 2020 specific surface are...

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Abstract

The invention discloses a homogeneous metal organic framework material. The homogeneous metal organic framework material is a micro-metallic organic framework material with a three-dimensional structure is formed by coordinating divalent metal ions with carboxyl on an organic ligand. The structural formula of the homogeneous metal organic framework material is [M2(C30H10N2O12)(H2O)2](C3H7NO)5(H2O)3. The homogeneous metal organic framework material is characterized in that memory storage of ethylene is increased by using strategies of introducing functional groups into the metal organic framework to form open metal site or adjusting the sizes of apertures / windows and the like. Based on the principle, the brand-new metal organic framework material is synthesized and has the advantages of simple preparation process, low cost, extremely-high C2H4 / N2 selective separation and adsorption properties, relatively-low isothermal adsorption enthalpy and low repeated use cost; multi-aspect requirements of an application field on a C2H4 / N2 selective separation and adsorption material can be greatly met; the homogeneous metal organic framework material has great application prospect in the fieldof C2H4 / N2 selective separation and adsorption and recycling of C2H4 in tail gas in a high density polyethylene device.

Description

Technical field [0001] The invention relates to a homogeneous metal organic frame material and a preparation method and application thereof, and belongs to the technical field of gas separation materials. Background technique [0002] With the development of social production and the prosperity of the market economy, the demand for ethylene is increasing day by day, and ethylene has become an important indicator of a country's petrochemical development. A large amount of tail gas is produced in the process of producing high-density polyethylene (HDPE) with ethylene as a raw material in a petrochemical plastic plant. The tail gas contains 80% (volume fraction) of N 2 , About 20% of C 2 H 4 And other hydrocarbon components. Due to C in exhaust 2 H 4 The content of other hydrocarbon substances is low, and it is difficult to further directly use. In the existing production process, due to the accumulation of impurity gas, most of the exhaust gas is discharged into the torch and burn...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01J20/30
CPCB01J20/226C08G83/008
Inventor 张章静叶应祥项生昌陈樑吉
Owner FUJIAN NORMAL UNIV
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