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Normal-pressure CO2 catalytic conversion cyclic carbonate synthesis method

A cyclic carbonate, catalytic conversion technology, applied in the field of catalytic chemistry, can solve the problems of catalyst recycling pollution, etc., achieve the effect of low price, reduce environmental pollution, and easy recycling

Active Publication Date: 2014-11-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Catalytic conversion of CO under atmospheric pressure in the prior art 2 The problems of catalyst recovery and pollution in the synthesis of cyclic carbonate technology exist, the purpose of the present invention is to provide a catalytic conversion of CO under normal pressure 2 In the method for synthesizing cyclic carbonate, the catalyst prepared and used in the method of the present invention can be reused after simple treatment, and is easy to recycle; and the scope of cocatalyst has been expanded

Method used

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Embodiment 1

[0033] (1) The synthesis steps of catalyst (3-methylsalicylaldehyde glycine) combined with zinc are as follows: take glycine and sodium hydroxide solid 10mmol respectively and mix them in a 500mL round bottom flask, add 200mL absolute ethanol, and heat to 80°C , condensed and refluxed for 1 hour under magnetic stirring, and the solids in the solution disappeared completely to obtain an anhydrous ethanol solution of sodium glycinate; 10 mmol of 3-methyl salicylaldehyde was added thereto, heated to 80°C, and condensed and refluxed for 1 hour under magnetic stirring , a bright yellow solution was generated, at which time the solid disappeared completely, and an ethanol solution of the ligand (3-methylsalicylglycine) was obtained. After that, 10 mmol Zn(NO 3 ) 2 heated to 80°C, condensed and refluxed for 1 h under magnetic stirring, no precipitation occurred, cooled to room temperature, filtered to obtain a solid, alternately washed with ice water and ice ethanol until the washin...

Embodiment 2

[0036] (1) The synthetic steps of catalyst (3-fluorosalicylaldehyde glycine) chromium synthesis are: get glycine and sodium hydroxide solid 10mmol respectively and mix in a 500mL round bottom flask, add 200mL absolute ethanol, heat to 80°C, Condensation and reflux reaction under magnetic stirring for 1h, the solids in the solution completely disappeared, and an anhydrous ethanol solution of sodium glycinate was obtained; 10mmol of 3-fluorosalicylaldehyde was added to it, heated to 80°C, and condensing and reflux reaction was performed under magnetic stirring for 1h to generate A bright yellow solution, at which time the solid completely disappeared, and an ethanol solution of the ligand (3-fluorosalicylglycine) was obtained. After that, 10 mmol Cr(NO 3 ) 3heated to 80°C, condensed and refluxed for 1 h under magnetic stirring, no precipitation occurred, cooled to room temperature, filtered to obtain a solid, washed alternately with ice water and ice ethanol until the washing l...

Embodiment 3

[0039] (1) The synthesis steps of catalyst (5-hydroxysalicylaldehyde glycine) manganese compound are: get glycine and sodium hydroxide solid 10mmol respectively and mix in 500mL round bottom flask, add 200mL absolute ethanol, heat to 80°C, Condensation and reflux reaction under magnetic stirring for 1h, the solid in the solution disappeared completely, and an anhydrous ethanol solution of sodium glycinate was obtained; 10mmol of 5-hydroxy salicylaldehyde was added to it, heated to 80°C, and condensing and reflux reaction was performed for 1h under magnetic stirring to generate A bright yellow solution, at which time the solid completely disappeared, and an ethanol solution of the ligand (5-hydroxysalicylglycine) was obtained. After that, 10 mmol Mn(NO 3 ) 2 heated to 80°C, condensed and refluxed for 1 h under magnetic stirring, no precipitation occurred, cooled to room temperature, filtered to obtain a solid, alternately washed with ice water and ice ethanol until the washing...

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Abstract

The invention discloses a normal-pressure CO2 catalytic conversion cyclic carbonate synthesis method, and relates to the field of catalytic chemistry. The method comprises the steps that: (1) glycine and sodium hydroxide are subjected to a reaction, such that sodium glycinate is obtained; sodium glycinate is subjected to a reaction with salicylaldehyde containing substituent, such that a condensation product is obtained; the condensation product is subjected to a reaction with transition metal nitrate, such that a catalyst L(M) is obtained; and (2) an epoxy compound is subjected to a reaction with CO2 under the condition with L(M) and a cocatalyst, such that the cyclic carbonate is obtained. The catalyst provided and applied by the invention can be repeatedly applied after simple treatments, and is easy to recover. The range of the cocatalyst is also expanded. With the catalyst and the cocatalyst, cyclic carbonate synthesis conditions are mild, and environment pollution is reduced.

Description

technical field [0001] The invention relates to a catalytic conversion of CO under normal pressure 2 The invention discloses a method for synthesizing cyclic carbonate, which belongs to the field of catalytic chemistry. Background technique [0002] CO 2 It is the most important greenhouse gas and the most abundant and cheap C1 resource, and its conversion and utilization are getting more and more attention. Using epoxy compounds and CO 2 Reactive synthesis of cyclic carbonates is one of the most promising development directions. As a non-toxic high boiling point solvent, cyclic carbonate is widely used in the removal of CO from mixed gas 2 , polycarbonate synthesis, lithium-ion battery electrolyte and other fields. CO 2 The reaction of cycloaddition with epoxy compounds to synthesize cyclic carbonates has no by-products, is a typical atom-economical reaction, and is in line with the development concept of green chemistry. [0003] The relevant literature that has bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/36B01J31/22
CPCB01J31/2217B01J2531/0275B01J2531/16B01J2531/26B01J2531/62B01J2531/72B01J2531/847C07D317/36
Inventor 胡长文邹波郝亮李晖
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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