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Method for synthesizing cyclic carbonate by using carbon dioxide and epoxide

A cyclic carbonate and epoxide technology, applied in chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, chemical/physical processes, etc., can solve the problems of large usage of quaternary ammonium salts, etc. To achieve the effect of simple process, simple catalyst system and high activity

Inactive Publication Date: 2011-09-21
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of quaternary ammonium salt used in this type of catalytic reaction system is relatively large (>1mol%), far exceeding the general amount used in industry (0.1~0.3mol%)

Method used

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  • Method for synthesizing cyclic carbonate by using carbon dioxide and epoxide
  • Method for synthesizing cyclic carbonate by using carbon dioxide and epoxide
  • Method for synthesizing cyclic carbonate by using carbon dioxide and epoxide

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Propylene oxide (29g), zinc molybdate catalyst (0.130g), and tetrabutylammonium bromide cocatalyst (0.241g) were added into an autoclave equipped with mechanical stirring and temperature-controlled heating device. Seal the reactor with CO 2 Replace the air in the kettle 3 times, then fill the reactor with CO 2 The initial pressure was 2.0MPa, the temperature was raised to 120°C, and the reaction was carried out for 1 hour. The reactor was cooled to room temperature, and the product propylene carbonate was separated by distillation under reduced pressure. Qualitative analysis was performed by GC-MS (HP 6890 / 5973), and quantitative analysis was completed by GC (Shanghai Analytical Instrument Company, GC-112A). See Table 1 for the conversion rate of raw material propylene oxide and the selectivity of product propylene carbonate.

Embodiment 2

[0023] Propylene oxide (29g), zinc molybdate catalyst (0.130g), and tetrabutylammonium bromide cocatalyst (0.161g) were added into an autoclave equipped with mechanical stirring and temperature-controlled heating device. Seal the reactor with CO 2 Replace the air in the kettle 3 times, then fill the reactor with CO 2 The initial pressure was 2.0MPa, the temperature was raised to 120°C, and the reaction was carried out for 1.5h. The reactor was cooled to room temperature, and the product propylene carbonate was separated by distillation under reduced pressure. Qualitative analysis was performed by GC-MS (HP 6890 / 5973), and quantitative analysis was completed by GC (Shanghai Analytical Instrument Company, GC-112A). See Table 1 for the conversion rate of raw material propylene oxide and the selectivity of product propylene carbonate.

Embodiment 3

[0025] Propylene oxide (29g), zinc molybdate catalyst (0.130g), and tetrabutylammonium bromide cocatalyst (0.323g) were added into an autoclave equipped with mechanical stirring and temperature-controlled heating device. Seal the reactor with CO 2 Replace the air in the kettle 3 times, then fill the reactor with CO 2 The initial pressure was 2.0MPa, the temperature was raised to 120°C, and the reaction was carried out for 0.5h. The reactor was cooled to room temperature, and the product propylene carbonate was separated by distillation under reduced pressure. Qualitative analysis was performed by GC-MS (HP 6890 / 5973), and quantitative analysis was completed by GC (Shanghai Analytical Instrument Company, GC-112A). See Table 1 for the conversion rate of raw material propylene oxide and the selectivity of product propylene carbonate.

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Abstract

The invention relates to a method for synthesizing cyclic carbonate by using carbon dioxide and epoxide. The method is characterized in that the cyclic carbonate with high yield is synthesized by taking metal molybdate as a catalyst and organic quaternary ammonium salt or alkali metal halide as a catalyst accelerator under the conditions that the initial pressure of the carbon dioxide is 0.1-10MPa, the reaction temperature is 40-140DEG C, the reaction time is 0.1-5h and the consumption of the catalyst is 0.01-3mol percent that of the epoxide. The method has the characteristics of mild reaction conditions, short reaction time, high yield of products, low consumption of the catalyst, and the like; and the method can be repeatedly used for multiple times.

Description

technical field [0001] The invention relates to a method for synthesizing cyclic carbonate with carbon dioxide and epoxide as raw materials. Background technique [0002] Currently, for carbon dioxide (CO 2 ) transformation and utilization has become the focus of global attention. What has been reported about CO 2 There are many conversion pathways, but due to CO 2 The molecule itself is very stable, and it is difficult to react with other substances, so CO 2 There are few technological routes for industrial production of raw materials. And by CO 2 The route to synthesize cyclic carbonates with epoxides is one of them. [0003] Cyclic carbonates represented by propylene carbonate / ethylene carbonate are high-boiling polar organic solvents with excellent performance, and are widely used in textiles, batteries, cosmetics, gas separation, and carbon dioxide (CO 2 ) and hydrogen sulfide gas absorption and other fields. It is also an important organic chemical used in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/38C07D317/36B01J31/34
Inventor 杨先贵周喜王公应
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI