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C3 symmetric bifunctional catalyst as well as preparation method and application thereof

A bifunctional catalyst, catalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc. Complete recovery and other problems, to achieve the effect of mild and simple synthesis method, good catalytic activity and low energy consumption

Pending Publication Date: 2022-07-22
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, most of the catalytic systems developed so far still require harsh reaction conditions such as high temperature and high pressure, which limit the practical application of the catalysts.
In addition, the addition of co-catalysts is often required in the developed binary catalytic system, which makes the catalytic system cannot be completely recovered, which greatly limits its application.

Method used

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  • C3 symmetric bifunctional catalyst as well as preparation method and application thereof
  • C3 symmetric bifunctional catalyst as well as preparation method and application thereof
  • C3 symmetric bifunctional catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, the [Ni(Me 6 Tren)I]I, other catalysts in the present invention can be selected and catalysts [Ni(Me 6 Tren)I]I is prepared in the same synthetic manner, and the corresponding amount of synthetic raw materials should be used during preparation.

[0036] Catalyst [Ni(Me 6 The preparation method of Tren)I]I: first weigh 1.6mmol (0.5g) of NiI 2 In a 50 mL round-bottomed flask, dissolve it with 20 mL of ethanol, and then take 1.6 mmol (0.410 mL) of Me 6 Tren was added dropwise to the above solution. The reaction was stirred at 55°C for 48h. After the reaction was completed and cooled, the post-reaction solution was filtered. After filtration, the filtrate was concentrated to about 1 / 5, and 40 ml of methyl tert-butyl ether was added to precipitate the product. After the product was completely precipitated, the precipitate was washed 3-4 times with methyl tert-butyl ether. The catalyst [Ni(Me 6 Tren)I]I. The obtained catalyst [Ni(Me 6 The single ...

Embodiment 2

[0039] Catalyst [Co(Me 6 Tren) I] I preparation method: first weigh 1.6 mmol (0.5 g) of CoI 2 In a 50 mL round-bottomed flask, dissolve it with 20 mL of ethanol, and then take 1.6 mmol (0.410 mL) of Me 6 Tren was added dropwise to the above solution. The reaction was stirred at 55°C for 48h. After the reaction was completed and cooled, the post-reaction solution was filtered. After filtration, the filtrate was concentrated to about 1 / 5, and 40 ml of methyl tert-butyl ether was added to precipitate the product. After the product was completely precipitated, the precipitate was washed 3-4 times with methyl tert-butyl ether. The catalyst [Co(Me 6 Tren)I]I.

[0040] Into a 10 mL Schlenk reaction tube, 0.05 mol of catalyst [Co(Me 6 Tren)I]I and 5 mmol of epichlorohydrin, after replacing the air in the reaction tube with carbon dioxide gas three times, a carbon dioxide balloon was inserted. The reaction was stirred for 24 h in an oil bath at 60 °C. After the reaction was co...

Embodiment 3

[0042] Catalyst [Ni(Me 6 Preparation method of Tren)Br]Br: First weigh 1.6mmol (0.349g) of NiBr 2 In a 50 mL round-bottomed flask, dissolve it with 20 mL of ethanol, and then take 1.6 mmol (0.410 mL) of Me 6 Tren was added dropwise to the above solution. The reaction was stirred at 55°C for 48h. After the reaction was completed and cooled, the post-reaction solution was filtered. After filtration, the filtrate was concentrated to about 1 / 5, and 40 ml of methyl tert-butyl ether was added to precipitate the product. After the product was completely precipitated, the precipitate was washed 3-4 times with methyl tert-butyl ether. The catalyst [Ni(Me 6 Tren)Br]Br.

[0043] Into a 10 mL Schlenk reaction tube, 0.05 mol of catalyst [Ni(Me 6 Tren)Br]Br and 5 mmol of epichlorohydrin, after replacing the air in the reaction tube with carbon dioxide gas three times, a carbon dioxide balloon was inserted. The reaction was stirred for 24 h in an oil bath at 80 °C. After the reactio...

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Abstract

The invention discloses a C3 symmetric bifunctional catalyst as well as a preparation method and application thereof. The bifunctional catalyst with Lewis acid-base active sites is obtained through a simple one-pot reaction, and CO2 and epoxide can be efficiently converted into corresponding cyclic carbonate under the mild conditions of normal pressure, low temperature and no solvent. In addition, the catalyst can be effectively separated through a simple method after catalysis, so that the catalyst can be recycled for multiple times, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a C 3 Preparation method of symmetrical bifunctional catalyst and its application in the synthesis of cyclic carbonate. Background technique [0002] Global warming is a huge challenge facing human society. As one of the main causes of global warming, the massive emission of carbon dioxide has caused a large number of natural disasters. Therefore, the storage and transformation of carbon dioxide by various methods is of great significance to reduce the concentration of carbon dioxide to improve the global climate. Carbon dioxide, as a class of abundant, non-toxic, and inexpensive C1 sources, can be directly converted into a variety of useful chemicals as chemical feedstocks. Among them, the application of carbon dioxide and epoxides to cyclic carbonates has received more attention due to their 100% atomic utilization. Secondly, the synthesized cyclic car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07D317/36C07F15/04C07F15/06
CPCB01J31/1805C07F15/045C07F15/065C07D317/36B01J2531/845B01J2531/847
Inventor 王小霞魏奋谢冠群王瑞丘家祥
Owner DONGGUAN UNIV OF TECH
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