Preparation method for metal organic framework and carbon nitride composite material capable of preferentially adsorbing alkane

A metal-organic framework, preferential adsorption technology, applied in the direction of alkali metal compounds, organic chemistry, adsorption purification/separation, etc., to achieve the effect of good stability

Pending Publication Date: 2019-07-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As of the filing date of the patent, there are only a few reports on ethane selective adsorption materials in the world, while propane selective adsorption materials are not reported at all.

Method used

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  • Preparation method for metal organic framework and carbon nitride composite material capable of preferentially adsorbing alkane
  • Preparation method for metal organic framework and carbon nitride composite material capable of preferentially adsorbing alkane
  • Preparation method for metal organic framework and carbon nitride composite material capable of preferentially adsorbing alkane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The ground graphite-like phase g-C 3 N 4 (2.54mg), ZrCl 4 (245mg1.05mmol), biphenyldicarboxylic acid (260mg1.05mmol), glacial acetic acid 2ml, N,N-dimethylformamide (DMF) 40ml, were added to the reaction kettle, stirred and sonicated for 20min. Then the reactor was heated to 100°C for 48h, then cooled to room temperature, and centrifuged. The product obtained by the reaction uses N,N-dimethylformyl

[0035] Rinse the material 3 times with amine; then soak in methanol for 48 hours, replace the methanol every 12 hours, and then keep it at 80°C for 6 hours. Finally, it was activated under vacuum condition at 100° C. for 12 hours to obtain the product, which was labeled as Example 1.

Embodiment 2

[0037] The ground graphite-like phase g-C 3 N 4 (5.08mg), ZrCl 4 (245mg1.05mmol), biphenyldicarboxylic acid (260mg1.05mmol), glacial acetic acid 2ml, N,N-dimethylformamide (DMF) 40ml were added to the reaction kettle, stirred and sonicated for 30min. Afterwards, the reactor was heated to 120° C. for 36 h, then cooled to room temperature, and centrifuged. The product obtained by the reaction was rinsed with N,N-dimethylformamide for 4 times; then soaked in methanol for 48 hours, the methanol was replaced every 12 hours, and then kept at 80°C for 6 hours. Finally, it was activated under vacuum at 120° C. for 8 hours to obtain the product, which was labeled as Example 2.

Embodiment 3

[0039] The ground graphite-like phase g-C 3 N 4 (15.23mg), ZrCl 4 (245mg1.05mmol), biphenyl dicarboxylic acid (260mg1.05mmol), 2ml of glacial acetic acid, 40ml of N,N-dimethylformamide (DMF) were added to the reaction kettle, stirred and ultrasonicated for 60min. Afterwards, the reactor was heated to 150° C. for 24 hours, then cooled to room temperature, and centrifuged. The product obtained by the reaction was rinsed with N,N-dimethylformamide for 5 times; then soaked in methanol for 48 hours, the methanol was replaced every 12 hours, and then kept at 80°C for 6 hours. Finally, the product was activated under vacuum condition at 160° C. for 4 hours to obtain the product, which was labeled as Example 3.

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PUM

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Abstract

The invention discloses a preparation method for a metal organic framework and carbon nitride composite material capable of preferentially adsorbing alkane. The method comprises the following steps: preparing solid powder-like carbon nitride; adding the obtained g-C3N4 and ZrCl4, a biphenyl dicarboxylic acid, a glacial acetic acid and N,N-dimethylformamide to a reaction kettle and mixing uniformly; heating an obtained mixture, and centrifugally separating to obtain a solid product, purifying, soaking, drying, and vacuum-activating, to obtain the composite adsorbing material capable of preferentially adsorbing the alkane. The method is capable of modifying a MOFs material with a developed pore structure by using a two-dimensional structure and abundant nitrogen sites of graphite-phase carbon nitride, and preparing the composite adsorbing material with alkane selectivity, wherein the material is capable of not only adsorbing ethane selectively from ethylene, but also adsorbing propane selectively from propylene, and this is firstly reported internationally. In addition, the material has good stability in a water vapor working condition. A technological base is established for an industrial application of preparing alkene with high purity.

Description

technical field [0001] The invention relates to a separation material capable of selectively adsorbing alkanes from alkenes, in particular to a preparation method of a metal organic framework-nitrogen carbide composite material. Background technique [0002] High-purity olefins (>99.95%) are key chemical raw materials and are widely used in the synthesis of various polymers, such as plastics, organic chemical intermediates, synthetic resins and rubbers. At present, the world consumes more than 200 million tons of ethylene and propylene every year. The industrially obtained high-purity olefins mainly come from the separation and purification of cracked gas, which involves the separation of ethylene / ethane and propylene / propane mixed gases. However, ethylene / ethane and propylene / propane have similar molecular sizes and melting and boiling points. The industry usually uses high-pressure and low-temperature rectification conditions and requires a very high number of plates t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/02B01J20/28B01J20/30C07C7/12C07C9/06C07C9/08C07C11/04C07C11/06
CPCB01J20/0259B01J20/226B01J20/28057B01J20/28069B01J20/3078B01J20/3085C07C7/12C07C9/06C07C9/08C07C11/04C07C11/06
Inventor 周欣王洒唐瑜佞郭丹煜李忠
Owner SOUTH CHINA UNIV OF TECH
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