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Disiloxane ionic liquid hybridization mesoporous molecular sieve SBA-15 composite material as well as preparation method and application of composite material

A mesoporous molecular sieve and ionic liquid technology, applied in separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of uneven distribution of ionic liquid grafting, unstable material structure, etc., to facilitate transportation and reduce energy consumption. Effect

Active Publication Date: 2014-04-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for synthesizing organic-inorganic materials mainly include post-grafting and sol-gel methods. The former usually has the shortcomings of ionic liquid grafting on the surface of the material and uneven distribution, resulting in unstable structure of the obtained material.

Method used

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  • Disiloxane ionic liquid hybridization mesoporous molecular sieve SBA-15 composite material as well as preparation method and application of composite material
  • Disiloxane ionic liquid hybridization mesoporous molecular sieve SBA-15 composite material as well as preparation method and application of composite material
  • Disiloxane ionic liquid hybridization mesoporous molecular sieve SBA-15 composite material as well as preparation method and application of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of a double siloxane ionic liquid hybrid mesoporous molecular sieve SBA-15 composite material, the steps are as follows:

[0048] (1) in N 2 Under protection, add elemental Na (0.23g, 0.01mol) to an appropriate amount of absolute ethanol (20ml) until the reaction is complete to obtain sodium ethoxide, then add equimolar imidazole (0.68g, 0.01mol) and stir at reflux at 40°C for 1 hours to get imidazole sodium.

[0049] (2) Add 3-chloropropyltriethoxysilane (4.8g, 0.02mol) to the sodium imidazole obtained in (1), stir and reflux at 60°C for 24 hours, and separate by solid-liquid filtration after the reaction; in the filtrate 3-Chloropropyltriethoxysilane (2.4 g, 0.01 mol) and absolute ethanol (10 ml) were added again, and the mixture was stirred and refluxed at 60° C. for 24 hours.

[0050] (3) Rotate the product after (2) reaction at 50°C to remove excess solvent, extract with anhydrous ether to remove unreacted raw materials, and finally dry in va...

Embodiment 2

[0056] A preparation method of a double siloxane ionic liquid hybrid mesoporous molecular sieve SBA-15 composite material, the steps are as follows:

[0057] (1) in N 2 Under protection, add elemental Na (0.23g, 0.01mol) into an appropriate amount of absolute ethanol (20ml) until the reaction is complete to obtain sodium ethoxide, then add equimolar imidazole (0.68g, 0.01mol) and stir at reflux at 60°C for 2 hours to get imidazole sodium.

[0058] (2) Add 3-chloropropyltriethoxysilane (4.8g, 0.02mol) to the sodium imidazole obtained in (1), stir and reflux at 80°C for 24 hours, and separate by solid-liquid filtration after the reaction; in the filtrate 3-Chloropropyltriethoxysilane (2.4 g, 0.01 mol) and absolute ethanol (10 ml) were added again, and the mixture was stirred and refluxed at 80° C. for 24 hours.

[0059] (3) Rotate the product after (2) reaction at 60°C to remove excess solvent, extract with anhydrous ether to remove unreacted raw materials, and finally dry in ...

Embodiment 3

[0065] A preparation method of a double siloxane ionic liquid hybrid mesoporous molecular sieve SBA-15 composite material, the steps are as follows:

[0066] (1) in N 2 Under protection, add elemental Na (0.23g, 0.01mol) into an appropriate amount of absolute ethanol (20ml) until the reaction is complete to obtain sodium ethoxide, then add equimolar imidazole (0.68g, 0.01mol) and stir at reflux at 65°C for 3 hours to get imidazole sodium.

[0067] (2) Add 3-chloropropyltriethoxysilane (4.8g, 0.02mol) to the sodium imidazole obtained in (1), stir and reflux at 85°C for 36 hours, and separate by solid-liquid filtration after the reaction; in the filtrate 3-Chloropropyltriethoxysilane (2.4 g, 0.01 mol) and absolute ethanol (10 ml) were added again, and the mixture was stirred at 85° C. and continued to reflux for 36 hours.

[0068] (3) Rotate the product after (2) reaction at 65°C to remove excess solvent, extract with anhydrous ether to remove unreacted raw materials, and fina...

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Abstract

The invention belongs to the field of ionic liquid immobilization, and particularly relates to the field of acid gas trapping such as capture and storage of SO2, removal of flue gas SO2 and the like, and discloses a disiloxane ionic liquid hybridization mesoporous molecular sieve SBA-15 composite material as well as a preparation method and application of the composite material. The preparation method comprises the following steps: synthesizing the disiloxane ionic liquid; synthesizing an organic-inorganic hybridization material by adopting a sol-gel method; successfully anchoring the disiloxane ionic liquid into the hole wall of a molecular sieve SBA-15 to obtain the disiloxane ionic liquid hybridization mesoporous molecular sieve SBA-15 composite material which is rich in micro-pores and meso-pores. As a solid chemical adsorbent, the disiloxane ionic liquid hybridization mesoporous molecular sieve SBA-15 composite material has the advantages of dry adsorption and also can remove acid gas, namely, SO2, from flue gas rapidly and efficiently under a high-temperature condition.

Description

technical field [0001] The invention belongs to the field of immobilization of ionic liquids, in particular to SO 2 capture and storage (SO 2 capture and storage, SCS), flue gas SO 2 In the field of acid gas capture such as removal, a double siloxane ionic liquid hybrid mesoporous molecular sieve SBA-15 composite material and its preparation method and application are disclosed. Background technique [0002] SO 2 As an important component of air pollution, it mainly comes from the massive combustion emissions of fossil fuels. The acid rain and smog caused by it have caused serious threats to the global environment and human health. Elimination of SO in the atmosphere 2 Has become the focus of attention of countries all over the world. SO capture from flue gas 2 , not only can eliminate environmental pollution, but also SO 2 As an important chemical raw material in industry, it can realize efficient utilization of energy and reduce the use of non-renewable resources. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/81B01D53/50
Inventor 李雪辉肖利容张磊王芙蓉于英豪王乐夫
Owner SOUTH CHINA UNIV OF TECH
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