A kind of preparation method and application of carbon-based solid acid

A carbon-based solid acid and application technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of high price of ionic liquids and large inorganic acid pollution, and achieve a simple synthesis route and strong industrialization. Meaningful, low-cost effects

Active Publication Date: 2020-01-07
JIANGSU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of large inorganic acid pollution and high price of ionic liquid, provide a method for preparing carbon-based solid acid, and use this material to catalyze the transformation of biomass sugar source to prepare 5-hydroxymethylfurfural (HMF) method

Method used

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  • A kind of preparation method and application of carbon-based solid acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 1 g of glucose in 1 mL of deionized water, stir the solution at room temperature for 3 h, add 1.0 g of phosphoric acid (commercially available phosphoric acid contains 85 wt%), stir for 2 h, then dry at 100°C for 24 h, and calcinate in nitrogen atmosphere at 300°C for 4 h. Hours can be used to detect the structure of the catalyst with TEM, the results are as follows figure 1 shown.

[0028] Take 0.2g of the catalyst obtained above, 1.2g of fructose, add 20mL of water and 30mL of sec-butanol, seal, react at 160°C for 3h, filter the reaction solution and detect it with ion chromatography, levulinic acid (LA) and 5-hydroxy The yields of methylfurfural (HMF) were 6.90% and 89.08%, respectively. It can be seen from the experimental results that the phosphorylated carbon-based solid acid has a good effect on catalyzing the conversion of sugar into the platform compound HMF.

[0029] The LA detection conditions are as follows: the mobile phase is 1mM NaOH solution, ...

Embodiment 2

[0031] Dissolve 1g of fructose in 5mL of deionized water, stir the solution at room temperature for 3h, add 1.25g of sulfuric acid, stir for 2h, then dry at 80°C for 24h, and then calcinate in nitrogen atmosphere at 300°C for 4h.

[0032] Get the catalyst 0.2g obtained above, fructose 1.2g, add 20mL water and 30mL sec-butanol, seal, react 180min at 160 ℃, detect with ion chromatography after the reaction solution is filtered, LA and HMF yields are respectively 10.27% and 57.20%.

Embodiment 3

[0034] Dissolve 1g of glucose in 1mL of deionized water, stir the solution at room temperature for 3h, add 0.1g of phosphoric acid, stir for 2h, then dry at 100°C for 12h, and calcine in nitrogen atmosphere at 300°C for 2 hours.

[0035] Get the catalyst 0.2g obtained above, glucose 1.2g, add 20mL water and 30mL sec-butanol, seal, react 180min at 160 DEG C, detect with ion chromatography after filtering the reaction solution, LA and HMF yields are respectively 5.12% and 54.20%.

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Abstract

The invention belongs to the technical field of biomass catalysis, and specifically relates to a preparation method and application of a carbon-based solid acid. The invention uses one or more of glucose, fructose, starch, and sucrose as a carbon source, and adds an appropriate amount of liquid acid to the catalyst Carry out modification to prepare carbon-based solid acid; use the prepared carbon-based solid acid to catalyze the reaction of carbohydrates to prepare 5-hydroxymethylfurfural, which has a mild reaction process, the catalyst used is environmentally friendly, and the process is simple and economical. The industrialized preparation of the platform compound 5-hydroxymethylfurfural provides a new way to promote the preparation of petroleum-based chemicals and alternative fuels from biomass, which has strong industrial significance.

Description

technical field [0001] The invention belongs to the technical field of biomass catalysis, and in particular relates to a carbon-based solid acid catalyzed preparation method and a method for selectively transforming biomass with a carbon-based solid acid catalyst to prepare 5-hydroxymethylfurfural (HMF). Background technique [0002] 5-Hydroxymethylfurfural (abbreviated as HMF) is an important bio-based platform compound and a key intermediate between biomass chemistry and petroleum-based chemistry. HMF is prepared from biomass, and then Converting to liquid fuels or bulk chemicals is of great significance for alleviating the increasingly tense fossil resources. It is reported that HMF can be converted into 2,5-dimethylfuran, which has better combustion performance and has a good application prospect. Further oxidation of HMF can give 2,5-diformylfuran and 2,5-furandicarboxylic acid, 2,5-diformylfuran can be used as drug intermediate or polymer precursor and antibacterial a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/02B01J27/16C07D307/46
CPCB01J27/02B01J27/16C07D307/46
Inventor 杨凤丽仝雪郑纯智
Owner JIANGSU UNIV OF TECH
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