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Metal organic framework material as well as preparation method and application thereof

A metal-organic framework and coordination technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc.

Active Publication Date: 2019-11-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the size, shape and physical properties of the gas molecules to be separated are relatively similar (such as C 2 h 2 / CO 2 ), how to separate similar components in the gas molecules to be separated becomes very challenging

Method used

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  • Metal organic framework material as well as preparation method and application thereof
  • Metal organic framework material as well as preparation method and application thereof
  • Metal organic framework material as well as preparation method and application thereof

Examples

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preparation example Construction

[0044] The present invention provides a method for preparing a metal-organic framework material described in the above technical solution, comprising the following steps:

[0045] (1) Mix copper tetrafluoroborate and hexafluoroammonium salt in water to obtain solution A; the hexafluoroammonium salt is ammonium hexafluorosilicate or ammonium hexafluorogermanate; mix bipyridylsulfur and methanol to obtain solution B;

[0046] (2) Add the solution A to the solution B dropwise, and let stand to obtain the metal organic framework material.

[0047] The present invention mixes copper tetrafluoroborate and hexafluoroammonium salt in water to obtain solution A; the hexafluoroammonium salt is ammonium hexafluorosilicate or ammonium hexafluorogermanate. In the present invention, when the metal organic framework material is [Cu(dps) 2 (SiF 6 )]·6H 2 O, the present invention mixes copper tetrafluoroborate and ammonium hexafluorosilicate in water, the molar ratio of copper tetrafluorob...

Embodiment 1

[0065] [Cu(dps) 2 (SiF 6 )].6H 2 o

[0066] Copper tetrafluoroborate Cu(BF 4 ) 2 with ammonium hexafluorosilicate (NH 4 ) 2 SiF 6 According to the molar ratio of 1:1, it was dissolved in 5 mL of deionized water, wherein the concentration of ammonium hexafluorosilicate was 0.0572 mol / L, and stirred at room temperature for 10 min to obtain solution A. Dissolve bipyridylsulfur in 5mL methanol to form solution B, the concentration of bipyridylsulfur is 0.0572mol / L; slowly add solution A to solution B at a rate of 1 mL / min, and let stand at room temperature for 24h. The resulting mixture was filtered with suction, washed with a large amount of methanol, and dried overnight in an oven at 25° C. to obtain 0.058 g of the product with a yield of 29.4%.

Embodiment 2

[0068] [Cu(dps) 2 (SiF 6 )].6H 2 o

[0069] Copper tetrafluoroborate Cu(BF 4 ) 2 with ammonium hexafluorosilicate (NH 4 ) 2 SiF 6 Dissolve in 50mL deionized water according to the molar ratio of 1:2, wherein the concentration of ammonium hexafluorosilicate is 1.144mol / L, and stir at room temperature for 10min to obtain solution A. Dissolve bipyridylsulfur in 50mL methanol to form solution B, the concentration of bipyridylsulfur is 1.144mol / L; slowly add solution A to solution B at a rate of 2mL / min, and let stand at room temperature for 24h. The resulting mixture was filtered with suction, washed with a large amount of methanol, and dried overnight in an oven at 25° C. to obtain 0.62 g of the product with a yield of 31.4%.

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Abstract

The invention relates to the field of metal organic framework materials, and provides a metal organic framework material and a preparation method and application thereof. The chemical formula of the metal organic framework material provided by the invention is [Cu(dps)2(SiF6)].6H2O or [Cu(dps)2(GeF6)].6H2O, wherein the dps is bipyridine sulfur. The metal organic framework material provided by theinvention contains fluorine adsorption sites, so that the metal organic framework material can adsorb a large amount of acetylene, but has very small adsorption capacity on other gases with similar sizes, such as ethylene, carbon dioxide and ethane, so that the metal organic framework material provided by the invention can be used for high-selectivity adsorption of acetylene. Results of embodiments show that the adsorption capacity of the metal organic framework material provided by the invention to acetylene under the same condition is far greater than that to ethylene, carbon dioxide and ethane.

Description

technical field [0001] The present invention relates to the field of metal organic framework materials, in particular to a metal organic framework material and its preparation method and application. Background technique [0002] Acetylene (C 2 h 2 ) is an important source of organic chemicals, which are often used as raw materials for the synthesis of acrylic acid derivatives, vinyl compounds and α-ethynyl alcohols. C 2 h 2 It is mainly prepared by the partial combustion of methane or the cracking of hydrocarbons, so the prepared acetylene often coexists with carbon dioxide. However, acetylene and carbon dioxide are in molecular size (C 2 h 2 : CO 2 : ) and physical properties (C 2 h 2 Boiling point: 189.3K, CO 2 The boiling point: 194.7K) similarity makes C 2 h 2 and CO 2 separation is a major challenge. [0003] Metal-organic frameworks (MOFs) are a new generation of porous materials. Compared with traditional solvent extraction or cryogenic distillati...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01J20/226C08G83/008
Inventor 王珺张艳邓曙光
Owner NANCHANG UNIV
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