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A kind of homogeneous metal organic framework material and its preparation method and application

A metal-organic framework and organic ligand technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of unobserved application prospects and high production costs, and achieve low reuse costs, low costs, and low isothermal adsorption enthalpy. Effect

Inactive Publication Date: 2020-06-30
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

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  • A kind of homogeneous metal organic framework material and its preparation method and application
  • A kind of homogeneous metal organic framework material and its preparation method and application
  • A kind of homogeneous metal organic framework material and its preparation method and application

Examples

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Embodiment 1

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

[0032] Add 1.81g of 5-amino-isophthalic acid and 1.34g of 1,4,5,8-naphthalene tetracarboxylic anhydride to 25mL of glacial acetic acid solution, react at 120°C for 15 hours, and after cooling down to room temperature, Filtrate, collect the precipitate, wash with distilled water until the pH value of the washing solution is neutral, and dry in vacuum at 80°C for 12 hours to obtain N,N'-bis(3,5-dicarboxybenzene)-1,4,5, 8-naphthalene diimide organic ligand 2.4g, yield 77%.

Embodiment 2

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

[0035] 30 mg of N,N'-di(3,5-dicarboxybenzene)-1,4,5,8-naphthalene diimide obtained in Example 1 and 36 mg of Cu(NO 3 ) 2 ·3H 2 O dissolved in N,N'-dimethylformamide (DMF) / dioxane / H 2 O (5mL, volume ratio: 3:1:1) mixed solvent, then add 80μL of concentrated HCl, put it in a 20mL seed bottle, seal it and put it in an oven at 80°C 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 was determined by Agilent Technologies SuperNova single crystal diffractometer test, 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 , belonging to the tetragonal crystal system, the space group is P42 1 2. The unit cell parameters are α=β=γ=90°, the unit...

Embodiment 3

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

[0051] 30 mg of N,N'-di(3,5-dicarboxybenzene)-1,4,5,8-naphthalene diimide obtained in Example 1 and 45 mg of Co(NO 3 ) 2 ·6H 2 O dissolved in N,N'-diethylformamide (DEF) / methanol / H 2 O (5mL, volume ratio: 3:1:1) mixed solvent, then add 80μL of concentrated HCl, put it in a 20mL strain bottle, seal it and put it in an oven at 80°C to react for 72, take it out and wash it repeatedly with DEF , to obtain metal-organic framework materials.

[0052] The metal-organic framework material obtained in this example is solvent-exchanged with anhydrous acetone, and the solvent is exchanged every half hour, at least ten times, and then activated under vacuum and 25°C for 12 hours, and then activated at 100°C After 12 hours, a metal-organic framework material with unsaturated metal sites and open pores was obtained. Micromeritics ASAP 2020 spec...

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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 framework material and its preparation method and application, belonging 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 symbol to measure the development of a country's petrochemical industry. The petrochemical plastic factory produces a large amount of tail gas during the production of high-density polyethylene (HDPE) with ethylene as raw material, and the tail gas contains 80% (volume fraction) of N 2 , about 20% of C 2 h 4 and other hydrocarbon components. Due to the C in the exhaust 2 h 4 The content of hydrocarbons and other substances is relatively low, and it is difficult to further directly utilize them. In the existing production process, due to the accumulation of impurity gases, ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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