Efficient nano composite catalyst capable of converting CO2 to cyclic carbonate and preparation method thereof

A cyclic carbonate and nanocomposite technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor stability, high catalyst preparation cost, and difficulty in recycling. and other problems, to achieve the effects of stable structure, wide range of substrates, and resistance to salt and alkali specific surface area.

Active Publication Date: 2019-03-12
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problems in the prior art, the object of the present invention is to provide a 2 A method for preparing a high-efficiency nanocomposite catalyst converted into cyclocarbonate, which solves the problems of high preparation cost, poor stability, and difficult recovery of existing catalysts

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  • Efficient nano composite catalyst capable of converting CO2 to cyclic carbonate and preparation method thereof
  • Efficient nano composite catalyst capable of converting CO2 to cyclic carbonate and preparation method thereof
  • Efficient nano composite catalyst capable of converting CO2 to cyclic carbonate and preparation method thereof

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preparation example Construction

[0034] The present invention provides a method using CO 2 The preparation method of the efficient nanocomposite catalyst that is converted into cyclocarbonate comprises the following steps:

[0035] (1) crushing and screening natural attapulgite ore to remove impurities to obtain attapulgite powder;

[0036] (2) Dispersing the attapulgite powder into the first solvent, adding a modifier, stirring and reacting, followed by centrifugation, washing, and drying to obtain a solid powder;

[0037] (3) Dispersing the solid powder into a second solvent, adding an organic ligand and a metal salt, stirring to dissolve it completely, and then standing still to obtain a pre-product;

[0038] (4) placing the pre-product in a room temperature or high-temperature oven to allow it to fully react, and then centrifuging, washing, and drying the product to obtain the high-efficiency nanocomposite catalyst;

[0039] The metal salts are rare earth salts and / or transition metal salts.

[0040] T...

Embodiment 1

[0060] A use of CO 2 The preparation method of the efficient nanocomposite catalyst that is converted into cyclocarbonate comprises the following steps:

[0061] S1: Add 60g of attapulgite powder to a 1000ml two-necked bottle equipped with a mechanical stirring device, add 600ml of deionized water as a solvent, and then add 1.6g of NaPF 6 As a modifier; control the temperature at 25-55 ° C, mechanically stir and ultrasonically disperse for 4 hours, after the reaction is completed, cool down to room temperature, centrifuge the product, wash, and dry to obtain a solid powder;

[0062] S2: Take 1.2g of the above solid powder and put it into a single-necked bottle, add 100ml DMF, disperse it ultrasonically, and then add 0.002mol Tb(NO 3 ) 3 After mixing with 0.005mol trimesic acid, magnetic stirring is used to completely dissolve the mixture, and the mixture is placed in an oven at 65° C. for 24 hours at a constant temperature. After the reaction is completed, the product is cen...

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Abstract

The invention belongs to the technical field of organic chemical industries, and particularly relates to an efficient nano composite catalyst capable of converting CO2 to cyclic carbonate and a preparation method thereof. The preparation method comprises the following steps: (1) smashing and sieving natural attapulgite ores, removing impurities, to obtain attapulgite powder; (2) enabling the attapulgite powder to be dispersed in a first solvent, adding a modifier, stirring and reacting, treating to obtain solid powder; (3) enabling the solid powder to be dispersed in a second solvent, adding an organic ligand and metal salt, stirring and enabling the solid powder to be completely dissolved, standing, to obtain a preliminary product; and (4) placing the preliminary product in an oven with aroom temperature or a high temperature, enabling the preliminary product to be adequately reacted, centrifuging, washing and drying a product, to obtain the catalyst, wherein the metal salt is rare earth salt and/or transition metal salt. The prepared catalyst has the characteristics of easy acquisition of raw materials, low cost, simple preparation process, stable structure, high catalytic efficiency, easy separation and cyclic utilization of the catalyst and the like.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, in particular to a 2 Efficient nanocomposite catalysts for conversion to cyclic carbonates and methods for their preparation. Background technique [0002] Combustion of fossil fuels is the main source of unnatural carbon dioxide emissions. Studies have shown that 85% of the energy needed by humans comes from coal, oil and natural gas, and only 15% comes from nuclear energy, solar energy, wind energy and biomass. However, fossil fuels are non-renewable. Although coal reserves can be used for 200 years, with the development of world industry, its demand will reach its peak in the next 10-40 years. The current oil and gas reserves cannot meet the needs of human beings, so there is an urgent need for a new technology based on renewable energy, which can reduce CO in the atmosphere on the one hand. 2 On the other hand, it can provide renewable energy. CO 2 Being a renewable ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07D317/36
CPCB01J21/16B01J27/182B01J31/0239B01J31/0255B01J31/1691B01J31/2239B01J31/26B01J35/0006B01J2531/38C07D317/36
Inventor 刘伟生王刚王文杰唐晓亮王莹窦伟张国林
Owner LANZHOU UNIVERSITY
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