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Novel CO2 cycloaddion ionic liquid catalyst and preparation method thereof

A technology of liquid catalysts and reactive ions, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of unsatisfactory catalyst activity and unsuitable for industrial production, etc., to achieve large-scale The effect of production, low cost and good thermal stability

Inactive Publication Date: 2010-08-25
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

However, after the ionic liquid is used as a catalyst to complete the catalytic reaction, vacuum distillation is required to separate the product from the ionic liquid, which is not suitable for industrial production in terms of energy consumption.
From the point of view of practical application, the current catalyst activity is still not satisfactory

Method used

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  • Novel CO2 cycloaddion ionic liquid catalyst and preparation method thereof
  • Novel CO2 cycloaddion ionic liquid catalyst and preparation method thereof
  • Novel CO2 cycloaddion ionic liquid catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0045] Embodiment 1, new CO 2 Preparation of Cycloaddition Catalysts

[0046] 1. Synthesis of chlorinated 1-allyl-3-methylimidazolium ionic liquid: mix N-methylimidazole and allyl chloride at a molar ratio of 1:1.11, heat to 55°C, and react under nitrogen protection 8h, 1-allyl-3-methylimidazolium chloride ionic liquid was obtained, yield: 78%.

[0047] 2. Preparation of ionic liquid by copolymerization of 1-allyl-3-methylimidazolium chloride ionic liquid and acrylic acid: mixing 1-allyl-3-methylimidazolium chloride ionic liquid with acrylic acid in a molar ratio of 1:8 , then add N,N-dimethylformamide (DMF) with 2 times the molar weight of acrylic acid and azobisisobutyronitrile with 1% molar weight of acrylic acid, react at 70°C for 24h under the protection of nitrogen, and then precipitate with chloroform, Filter to obtain a light yellow polymer, and dry it in a vacuum oven at 100°C for 24 hours. Yield: 51%.

Embodiment 2

[0048] Embodiment 2, catalytic CO 2 cycloaddition reaction

[0049] Add 10ml of epichlorohydrin, magneton, and 0.1g of the catalyst of the present invention into a 50mL stainless steel autoclave. After replacing the air, first raise the temperature to 150° C., then pass carbon dioxide, adjust the pressure of the reactor to 1.25Mpa, and stir. When reacting for 1h. After the reaction was completed, it was cooled with an ice-salt bath, and then deflated, and the obtained mixture was filtered to obtain the corresponding cyclocarbonate. The conversion rate was 92%.

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Abstract

The invention provides a novel high-efficient CO2 cycloaddion ionic liquid catalyst with high selectivity and high conversion rate. The catalyst is prepared by the following steps of: mixing N-methylimidazole and allyl chloride in a proper molar ratio; heating the mixture to between 55 and 70 DEG C, and reacting the mixture for 8 to 12 hours in the protection of nitrogen to prepare 1-allyl-3-methylimidazole chloride ionic liquid; and copolymerizing the 1-allyl-3-methylimidazole chloride ionic liquid with acrylic acid. The ionic liquid catalyst prepared by the method has higher thermal stability, higher selectivity and conversion rate for generating five-membered ring compounds by carbon dioxide and epoxy compounds, simple preparation method, low cost and reusability, is suitable for large-scale production, and has wide application prospect in the industrial catalytic field.

Description

technical field [0001] The invention belongs to the technical field of industrial catalysis and relates to a CO 2 Catalysts for cycloaddition reactions, especially concerning a new type of highly efficient CO with high selectivity and high conversion 2 Catalysts for cycloaddition reactions. Background technique [0002] With the acceleration of industrialization and the increasing population of countries all over the world, the demand for resources such as coal, oil and natural gas is increasing. These limited and non-renewable resources on the earth are being consumed in large quantities. Moreover, it also causes regional air pollution and "greenhouse effect" due to combustion emissions. According to statistics, in the past 100 years, the surface temperature has risen by 0.6°C, which is equivalent to the CO2 in the atmosphere. 2 For every 10% increase, the surface temperature will rise by 0.43°C. According to relevant information, CO in the atmosphere 2 Every time the ...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J37/00C07D317/36
Inventor 王荣民王鸿熊玉兵王泽
Owner NORTHWEST NORMAL UNIVERSITY
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