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a co 2 Nanocomposite catalyst for efficient conversion into cyclocarbonate and preparation method thereof

A nano-composite and cyclocarbonate technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve poor stability, Catalyst preparation costs are high, difficult to recycle, etc., to achieve the effect of easy removal, wide application range of substrates, and low cost

Active Publication Date: 2021-11-05
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a CO 2 A method for preparing a nanocomposite catalyst that is efficiently converted into cyclocarbonate, and the prepared catalyst can solve the technical problems of high preparation cost, poor stability and difficult recovery of existing catalysts

Method used

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  • a co <sub>2</sub> Nanocomposite catalyst for efficient conversion into cyclocarbonate and preparation method thereof
  • a co <sub>2</sub> Nanocomposite catalyst for efficient conversion into cyclocarbonate and preparation method thereof
  • a co <sub>2</sub> Nanocomposite catalyst for efficient conversion into cyclocarbonate and preparation method thereof

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preparation example Construction

[0038] The present invention provides a CO 2 A method for preparing a nanocomposite catalyst converted into cyclocarbonate with high efficiency, comprising the following steps:

[0039] (1) contacting the attapulgite powder with a modifier, centrifuging, washing, and drying the reaction product to obtain a solid powder;

[0040] (2) The solid powder is contacted and reacted with a metal salt, and then CO is introduced into the reaction system 2 , to obtain the pre-product;

[0041] (3) sintering the pre-product to obtain the nanocomposite catalyst;

[0042] The metal salts are rare earth salts and / or transition metal salts.

[0043] The technical idea of ​​the present invention is to carry out composite reaction of attapulgite and metal salt to obtain a composite material of nano attapulgite and metal oxide; 2 The catalyst in the synthesis of cyclocarbonate has many advantages such as stable structure, no pollution to the product in the catalytic process, easy separation o...

Embodiment 1

[0066] a CO 2 A method for preparing a nanocomposite catalyst converted into cyclocarbonate with high efficiency, comprising the following steps:

[0067] S1: Add 30g of attapulgite powder to a 500ml two-necked bottle equipped with a mechanical stirring device, add 300ml of deionized water as a solvent, and then add 0.8g 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;

[0068] S2: Take 2.5g of the above solid powder and put it into a single-mouth bottle, add 100ml of ultrapure water, disperse it ultrasonically, and then add 1.5mmol ZnCl 2 , magnetically stirred until it was completely dissolved, and introduced CO into the one-necked bottle 2 gas, fully reacted for 6 hours, centrifuged, washed and dried the product to obtain the pre-product;

[0069] S3: The pre-product is pla...

Embodiment 2

[0071] This embodiment is the same as the preparation method of the solid powder in Example 1, the difference is that in step S2, 1mmol ZnCl is added 2 and 0.5 mmol ErCl 3 ;specific:

[0072] S2: Take 2.5g of the above solid powder and put it into a single-mouth bottle, add 100ml of ultrapure water, disperse it ultrasonically, and then add 1mmol ZnCl 2 and 0.5 mmol ErCl 3 , magnetically stirred until it was completely dissolved, and introduced CO into the one-necked bottle 2 gas, fully reacted for 6 hours, centrifuged, washed and dried the product to obtain the pre-product;

[0073] S3: The pre-product is placed in a high-temperature sintering furnace, and sintered at 800° C. for 2 hours to obtain the nanocomposite catalyst, which is designated as A-2.

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Abstract

The invention belongs to the technical field of organic synthesis, in particular to a CO 2 A nanocomposite catalyst efficiently converted into cyclocarbonate and a preparation method thereof; the preparation method comprises: (1) contacting the attapulgite powder with a modifier, centrifuging, washing, and drying the reaction product to obtain a solid powder (2) the solid powder is contacted with a metal salt for reaction, and then CO is introduced into the reaction system 2 , to obtain a pre-product; (3) sintering the pre-product to obtain the nanocomposite catalyst; the metal salt is a rare earth salt and / or a transition metal salt; the nanocomposite catalyst provided by the invention has a catalyst raw material Easy to get, low cost, simple preparation process, good selectivity, stable structure, high multi-metal synergistic catalytic efficiency and easy separation and recycling of the catalyst; the catalyst has the advantages of not using a solvent during the catalytic reaction, and the catalyst has no effect on the air. It is not sensitive to water and has the advantages of wide application range of substrates.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, in particular to a CO 2 A nanocomposite catalyst for efficient conversion to cyclocarbonate and a preparation method thereof. Background technique [0002] Energy is the material basis for the survival and development of human society, and plays a very important role in the development of the national economy and modern society. The traditional energy structure is dominated by fossil fuels. With the rapid development of society, the reserves of fossil fuels Shrinking day by day, the energy crisis is getting worse. And, with the extensive use of fossil fuels, the released CO 2 Enhanced the greenhouse effect, thus also caused a certain environmental impact. According to survey reports, CO in the atmosphere 2 The total amount is about 3.67×106 billion tons, which is equivalent to about 10 times the carbon content of coal and petroleum. Therefore, CO 2 It is a kind of abundant and chea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J23/10B01J27/182B01J31/26C07D317/36
CPCB01J23/06B01J23/10B01J27/182B01J31/0239B01J31/0255B01J31/26B01J35/0006C07D317/36Y02P20/584
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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