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Method for preparing cyclic carbonate by utilizing combined catalysis of succinimide and halide

A technology of succinimide and cyclic carbonate, applied in the field of catalytic synthesis, can solve problems such as harsh reaction conditions, and achieve the effects of strong substrate adaptability, efficient synthesis and low energy consumption

Active Publication Date: 2018-07-20
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be noted that the currently reported compounds are mainly compounds containing hydroxyl and carboxyl groups; on the other hand, although these compounds and halides can effectively catalyze the coupling reaction of carbon dioxide and epoxy compounds, the reaction conditions are still relatively harsh (such as pressure generally requires Above 1MPa, the reaction temperature is required to be greater than 100°C) Some even need to use toxic organic solvents, etc.

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  • Method for preparing cyclic carbonate by utilizing combined catalysis of succinimide and halide
  • Method for preparing cyclic carbonate by utilizing combined catalysis of succinimide and halide

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Effect test

Embodiment 1-16

[0018] A method for preparing cyclic carbonates by combined catalysis of succinimide and halides, specifically: in a 100mL stainless steel autoclave, add a certain amount of succinimide and halides in sequence, and then quickly add propylene oxide (PO) 100mmol closed reactor, filled with CO at room temperature 2 After reaching a certain pressure, the temperature is controlled by the temperature controller to rise to a certain temperature, and the constant pressure reacts for a certain period of time. Cool to room temperature after the reaction, release excess CO slowly 2 , Distill the resulting liquid under reduced pressure to obtain the product propylene carbonate, and analyze the selectivity of the product by gas chromatography. The specific reaction conditions and reaction results of each embodiment are shown in Table 1.

[0019] Table 1 The results of the coupling reaction of carbon dioxide and propylene oxide catalyzed by different catalytic systems under different cond...

Embodiment 17-20

[0023] A method for preparing cyclic carbonates by combined catalysis of succinimide and halides, specifically: in a 100mL stainless steel autoclave, add 1 mmol each of succinimide and sodium iodide in sequence, and then quickly add epoxy compounds 20mmol, airtight reactor, filled with CO at room temperature 2 After reaching a pressure of 0.2 MPa, the temperature was controlled by a temperature controller to rise to 50°C, and the reaction was performed at constant pressure for a certain period of time. Cool to room temperature after the reaction, release excess CO slowly 2 , Pass the resulting product through the column to obtain the corresponding pure product, and analyze the selectivity of the product by gas chromatography. The specific reaction conditions and reaction results of each embodiment are shown in Table 2.

[0024] Table 2 The results of the coupling reaction between carbon dioxide and different epoxy compounds catalyzed by sodium iodide and succinimide

[0025...

Embodiment 21-25

[0027] A kind of method that utilizes succinimide and halide to jointly catalyze and prepare the method for cyclic carbonate, specifically: in 100mL stainless steel autoclave, add succinimide and potassium iodide each 1mmol successively, then add epoxy compound 20mmol rapidly, Close the reactor and fill it with CO at room temperature 2 After the pressure reaches 0.4MPa, the temperature is controlled by the temperature controller to rise to 70°C, and the reaction takes place for a certain period of time. Cool to room temperature after the reaction, release excess CO slowly 2 , Pass the resulting product through the column to obtain the corresponding pure product, and analyze the selectivity of the product by gas chromatography. The specific reaction conditions and reaction results of each embodiment are shown in Table 3.

[0028] Table 3 The results of the coupling reaction between carbon dioxide and different epoxy compounds catalyzed by potassium iodide and succinimide

[...

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Abstract

The invention discloses a method for preparing cyclic carbonate by utilizing combined catalysis of succinimide and halide. According to the method, carbon dioxide and an epoxy compound serve as raw materials, and the cyclic carbonate is catalytically prepared under the synergistic action of the succinimide and the halide, wherein the reaction pressure is 0.1-1.0MPa, the reaction temperature is 25-90 DEG C, and the reaction time is 1-10h. Compared with the prior art, the ingredients in a catalytic system disclosed by the invention are cheap, simple and easy to obtain, the reaction condition ismoderate, the substrate is strong in adaptability, the corresponding cyclic carbonate can be efficiently synthesized, and the method has a relatively good industrialized application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalytic synthesis, and in particular relates to a method for preparing cyclic carbonates by using carbon dioxide and epoxy compounds as raw materials and utilizing succinimide and halides to jointly catalyze. Background technique [0002] CO 2 It is one of the main greenhouse gases, and it is also a cheap and easy-to-get C1 resource. CO 2 The utilization of resources has always been an important research topic. where through CO 2 Reaction with epoxy compounds to produce cyclic carbonate is CO 2 One of the most effective ways of resource utilization, the reaction is not only a 100% atomic economic reaction, but also the obtained cyclic carbonate is a very important chemical raw material, in the fields of pharmaceutical synthesis, batteries, fine chemicals and polymer materials Has a wide range of applications. [0003] Due to the thermodynamic stability and kinetic inertness of carbon dioxide, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/36
CPCC07D317/36
Inventor 常海波李庆硕杨浩李润明乔聪震周大鹏
Owner HENAN UNIVERSITY
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