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Porous acid-base bifunctional solid catalyst as well as preparation method and application thereof

A technology of acid-base dual function and solid catalyst, which is applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. high cost

Active Publication Date: 2020-05-19
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method involves a large amount of organic solvents, is not environmentally friendly, and the cost of raw materials is high, the synthesis process is complicated, and it is not easy to expand production

Method used

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  • Porous acid-base bifunctional solid catalyst as well as preparation method and application thereof
  • Porous acid-base bifunctional solid catalyst as well as preparation method and application thereof
  • Porous acid-base bifunctional solid catalyst as well as preparation method and application thereof

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preparation example Construction

[0028] The invention provides a method for preparing a porous acid-base bifunctional solid catalyst, and the specific steps are:

[0029] Mixing clay minerals, acid monomers, alkali monomers and water to obtain a mixture;

[0030] Ball milling the mixture to obtain a porous acid-base bifunctional solid catalyst;

[0031] The acid monomer is chlorosulfonic acid and / or sulfonic acid triethoxysilane;

[0032] The basic monomer is 3-aminotriethoxysilane and / or 3-(2-aminoethyl)-aminopropyltrimethoxysilane.

[0033] The present invention has no special requirements on the sources of the clay minerals, acid monomers, alkali monomers and water, and commercially available products can be used.

[0034] In the present invention, clay minerals, acid monomers, alkali monomers and water are mixed to obtain a mixture.

[0035] In the present invention, the clay mineral preferably includes one or more of kaolinite, montmorillonite, palygorskite and sepiolite; when the clay mineral preferably includes tw...

Embodiment 1

[0056] Take 2g of kaolinite, 1g of chlorosulfonic acid, 1g of 3-aminotriethoxysilane, 10mL of deionized water, mix well, transfer to a 50mL ball milling tank, add 30g of zirconium dioxide ball milling beads with a diameter of 10mm, and perform mechanical The ball milling conditions are as follows: the speed is 250 rpm and the time is 60 min. After the ball milling is finished, wash with deionized water, the amount of deionized water is 20mL, magnetic stirring for 1h, suction filtration, repeat 3 times. Finally, it was dried at 65°C for 10 hours to obtain a porous acid-base bifunctional solid catalyst.

[0057] The scanning electron micrograph of the obtained porous acid-base bifunctional solid catalyst is as follows figure 2 Shown from figure 2 It can be concluded that the porous acid-base bifunctional solid catalyst prepared in this example has an irregular sheet structure.

[0058] A Fourier transform infrared spectrometer (FT-IR) was used to analyze the structure of the solid...

Embodiment 2

[0061] Take 2g of palygorskite, 2g of chlorosulfonic acid, 1g of 3-aminotriethoxysilane, 10mL of deionized water, mix well, transfer to a 50mL ball milling tank, add 30g of zirconium dioxide ball milling beads with a diameter of 10mm, and perform mechanical The ball milling conditions are as follows: the speed is 300 rpm and the time is 120 min. After the ball milling is finished, wash with deionized water, the amount of deionized water is 20mL, magnetic stirring for 1h, suction filtration, repeat 3 times. Finally, it was dried at 65°C for 12 hours to obtain a porous acid-base bifunctional solid catalyst.

[0062] Using test equipment (nitrogen adsorption and desorption instrument, NH 3 -TPD and CO 2 -TPD) Test the porous structure, acidity and alkalinity of the solid catalyst prepared in Example 2, and it can be concluded that the total specific surface area of ​​the porous acid-base bifunctional solid catalyst prepared in this embodiment is 318.4m 2 / g, the mesoporous specific ...

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Abstract

The invention relates to the technical field of solid catalysts, in particular to a porous acid-base bifunctional solid catalyst as well as a preparation method and application thereof. According to the preparation method of the porous acid-base bifunctional solid catalyst provided by the invention, the clay mineral is used as the carrier, so that the cost is low; and water is used as a solvent, aball milling method is adopted for functional modification, the reaction efficiency is high, no organic solvent is involved in the synthesis process, and environmental friendliness and high efficiency are achieved. The result of the embodiment shows that the porous acid-base bifunctional solid catalyst prepared on the basis of the ball milling method provided by the invention has a porous structure, meanwhile, the catalyst contains acid-base bifunctional catalytic sites, the thermal stability of the catalyst is high, cellulose can be directly catalyzed and converted into 5-hydroxymethylfurfural in an aqueous solution, and compared with a traditional method, the preparation method of the catalyst is simple, efficient and environmentally friendly, raw materials are cheap and easy to obtain,and the whole process is environmentally friendly and efficient.

Description

Technical field [0001] The invention relates to the technical field of solid catalysts, in particular to a porous acid-base bifunctional solid catalyst, and a preparation method and application thereof. Background technique [0002] The rapid development of the global economy and the growing population size have triggered a global energy crisis. At the same time, due to the massive exploitation and use of non-renewable fossil energy, problems such as environmental pollution and ecological damage have become increasingly prominent. Therefore, the development of renewable environmentally friendly new energy has become a top priority. Among them, lignocellulosic biomass, as the most abundant organic matter on the earth, has many advantages such as a wide range of sources, renewable, and environmental friendliness. It is expected to replace traditional fossil energy sources and has attracted widespread attention from all over the world. Among the many biomass-based derivatives, 5-h...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/10C07D307/46
CPCB01J31/38C07D307/46B01J35/615B01J35/633
Inventor 申锋孙爽漆新华杨吉睿仇茉
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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