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Anionic Zn (II)-MOF for one-step purification of ethylene

An anionic and ionic technology, applied in the direction of adsorption purification/separation, organic chemistry, other chemical processes, etc., can solve cumbersome problems

Active Publication Date: 2022-01-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although several MOFs have been reported for ethylene from C 2 One-step purification of hydrocarbons, but the construction of these MOFs uses very complex organic ligands, which require tedious steps to synthesize

Method used

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  • Anionic Zn (II)-MOF for one-step purification of ethylene
  • Anionic Zn (II)-MOF for one-step purification of ethylene
  • Anionic Zn (II)-MOF for one-step purification of ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix the organic ligand (0.025mmol ATZ and 0.0125mmol iPA-OH) and zinc nitrate hexahydrate (0.03mmol) in 4.0mL of N,N-dimethylformamide, add 0.14mL of tetrafluoroboric acid, seal in a vial middle. Crystals of the metal-organic framework were obtained via thermal reaction at 135° C. for 72 hours.

Embodiment 2

[0023] Mix the organic ligand (0.025mmol ATZ and 0.0125mmol iPA-OH) with anhydrous zinc acetate (0.03mmol) in 4.0mL of N,N-dimethylformamide, add 0.12mL of tetrafluoroboric acid, seal in a vial middle. Crystals of the metal-organic framework were obtained via thermal reaction at 150° C. for 48 hours.

[0024] The test result of the product of above-mentioned embodiment gained is identical, specifically sees following:

[0025] (1) Determination of crystal structure:

[0026] Select crystals with regular shape, smooth surface and appropriate size, and use graphite monochromatic enhanced Cu-Kα radiation source at room temperature The crystal data were collected on a Rigaku Supernova CCD diffractometer, and then the crystal structure was analyzed and refined. See the structure diagram Figure 1 to Figure 2 . The crystallographic data are listed in Table 1.

[0027] Table 1 Crystallographic data of MOFs

[0028]

[0029]

[0030] figure 1 The structure diagram shows...

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PUM

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Abstract

The invention discloses anionic Zn (II)-MOF for one-step purification of ethylene, and belongs to the technical field of crystalline materials. The chemical formula of the compound is [Me2NH2]3[Zn14(ATZ)12(iPA-O)6(COO)] (BUT-303). Synthesis of the metal-organic framework is as follows: under closed conditions, an organic ligand 5-hydroxy-isophthalic acid (iPA-OH) and 1, 2, 4-triazole-5-amine (ATZ) are subjected to a solvothermal reaction with zinc nitrate hexahydrate or anhydrous zinc acetate in N, N-dimethylformamide and tetrafluoroboric acid to obtain a crystal of the metal-organic framework material. The metal organic framework material shows the potential of purifying ethylene from C2.

Description

technical field [0001] The invention belongs to the technical field of crystalline materials, and the technology relates to a metal-organic coordination polymer material, which is characterized in that it is an anionic Zn(II) metal-organic framework material, a preparation method and its adsorption and separation research. Background technique [0002] Ethylene (C 2 h 4 ) is called industrial blood and is an indispensable raw material for the production of chemicals such as ethylene oxide and polyethylene. Ethane (C 2 h 6 ) and acetylene (C 2 h 2 ) is C 2 h 4 Two major impurities in production processes including steam cracking of naphtha and dehydrogenation of ethane. The presence of acetylene not only damages the catalysts used for ethylene polymerization, but also reacts with these catalysts to form solid metal acylates, which clog the fluids and cause explosions. The presence of ethane will prolong the reactor residence time and reduce the production efficiency....

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01J20/30C07C7/12C07C11/04
CPCC08G83/008B01J20/226B01J20/3085C07C7/12C07C11/04
Inventor 李建荣徐明明谢林华刘玉辉
Owner BEIJING UNIV OF TECH
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