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Acid-basebifunctional solid catalyst as well as preparation method and application thereof

A solid catalyst, acid-base dual-function technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of poor performance and stability of ionic liquids, cumbersome preparation process, and inability to use in large quantities. Easy to separate, recyclable, less dosage and low cost

Inactive Publication Date: 2019-09-13
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prior art CN108084120A discloses an acid-base bifunctional solid catalyst for the preparation of 5-hydroxymethylfurfural and its preparation method and application. It uses an amino-functionalized alkylimidazole ionic liquid as a cationic precursor, and H 3 PW 12 o 40 Heteropolyacids are anion precursors, which have a certain improvement in catalytic efficiency. However, although ionic liquids have high catalytic efficiency, they have disadvantages such as cumbersome preparation process and high cost, and the performance stability of ionic liquids is not good. In actual production cannot be used in large quantities

Method used

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  • Acid-basebifunctional solid catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method for an acid-base bifunctional solid catalyst, comprising the steps of:

[0048] S1. Add 1.0g P123 and 20g absolute ethanol to a round bottom flask, stir at 35°C for 3h, add 1.0g aluminum isopropoxide, continue stirring for 4h, add HCl to adjust the pH to 1, continue stirring for 1h, then add 4.0g benzene Boric acid, continue to stir for 1h;

[0049] S2. The above-mentioned mixed solution was sonicated for 1 hour, and then placed at 80° C. for two days for volatile self-assembly to obtain the residue after volatile self-assembly;

[0050] S3. Calcining the above residue to prepare an acid-base bifunctional solid catalyst, wherein the calcination temperature is 400° C. and the calcination time is 6 hours to obtain a solid catalyst.

[0051] A preparation method of 5-HMF, comprising the following steps: weighing 0.02g of catalyst, adding 0.05g of glucose into 11g of DMSO, reacting at 140°C for 240min, and quenching after the reaction.

[0052] The mo...

Embodiment 2

[0054] A preparation method for an acid-base bifunctional solid catalyst, comprising the steps of:

[0055] S1. Add 1.0g P123 and 20g absolute ethanol to a round bottom flask, stir at 35°C for 3h, add 4.0g aluminum isopropoxide, continue stirring for 4h, add HCl to adjust the pH to 1, continue stirring for 1h, then add 1.0g benzene Boric acid, continue to stir for 1h;

[0056] S2. The above-mentioned mixed solution was sonicated for 1 hour, and then placed at 80° C. for two days for volatile self-assembly to obtain the residue after volatile self-assembly;

[0057] S3. Calcining the above residue to prepare an acid-base bifunctional solid catalyst, wherein the calcination temperature is 400° C. and the calcination time is 6 hours to obtain a solid catalyst.

[0058] A preparation method of 5-HMF, comprising the following steps: weighing 0.02g of catalyst, adding 0.05g of glucose into 11g of DMSO, reacting at 140°C for 240min, and quenching after the reaction.

[0059] The mo...

Embodiment 3

[0061] A preparation method for an acid-base bifunctional solid catalyst, comprising the steps of:

[0062] S1. Add 1.0g P123 and 20g absolute ethanol to a round bottom flask, stir at 35°C for 3h, add 1.0gAl-SBA-15, continue stirring for 4h, add HCl to adjust the pH to 1, continue stirring for 1h, then add 1.0g phosphorus Tungstic acid, continue to stir for 1h;

[0063] S2. The above-mentioned mixed solution was sonicated for 1 hour, and then placed at 80° C. for two days for volatile self-assembly to obtain the residue after volatile self-assembly;

[0064] S3. Calcining the above residue to prepare an acid-base bifunctional solid catalyst, wherein the calcination temperature is 400° C. and the calcination time is 6 hours to obtain a solid catalyst.

[0065] A preparation method of 5-HMF, comprising the following steps: weighing 0.02g of catalyst, adding 0.05g of glucose into 11g of DMSO, reacting at 140°C for 240min, and quenching after the reaction.

[0066] The molar yie...

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Abstract

The invention discloses an acid-basebifunctional solid catalyst as well as a preparation method and application thereof. The preparation method of the acid-base bifunctional solid catalyst comprises the following steps: mixing a templating agent and absolute ethanol, adding a Lewis acid, performing mixing, adjusting the pH to 1-5, and adding an acid to prepare a mixed solution; performing ultrasonic treatment on the above mixed solution, and performing solvent volatilization self assembly to obtain residues after volatilization self assembly; and performing calcination on the above residues toobtain the acid-base bifunctional solid catalyst. According to the preparation method of the acid-base bifunctional solid catalyst provided by the invention, and the solid catalyst prepared by the method has acid and alkali catalytic active sites, realizes acid-base synergistic catalysis in the solid catalyst, accelerates the progress of a catalytic reaction, reduces generation of by-products, and has a sugar conversion rate of 99.3% and a 5-hydroxymethylfurfural yield of 80.2% when used to catalyze preparation of the 5-hydroxymethylfurfural from biomass sugar.

Description

technical field [0001] The invention relates to the technical field of chemical catalysts, in particular to an acid-base bifunctional solid catalyst and its preparation method and application. Background technique [0002] As a kind of renewable energy, biomass energy has a wide range of sources, low price, and abundant reserves. It has become an ideal alternative resource and has attracted widespread attention. How to directly convert carbohydrates into high value-added industrial products or platforms in an economical, safe, and efficient manner The use of chemical compounds to replace traditional fossil fuels to meet various needs will be an important way to solve future energy problems and is also conducive to the sustainable development of human society. Among them, the use of biomass to prepare energy and chemicals is a hot research field in domestic and foreign scientific and industrial circles, and the preparation of 5-hydroxymethylfurfural (5-HMF) has become one of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J29/03B01J23/14B01J37/08B01J37/34C07D307/46
CPCB01J21/04B01J23/14B01J29/0341B01J37/0018B01J37/082B01J37/343C07D307/46
Inventor 林晓清肖江雄郑嘉怡袁淑娴彭智童张可炫刘耀郑晓洁
Owner GUANGDONG UNIV OF TECH
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