Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing 5-hydroxymethylfurfural by solid acid catalysis

A hydroxymethylfurfural, solid acid catalysis technology, applied in chemical instruments and methods, catalyst carriers, physical/chemical process catalysts and other directions, can solve the problems of waste of resources, physical and chemical properties and processing performance obstacles, etc. Reaction activation energy, effect of lowering reaction temperature

Inactive Publication Date: 2014-04-09
XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical and chemical properties, processing properties, and technology of lignin have become obstacles to the current lignin research, and most of the lignin is directly discarded, resulting in a huge waste of resources
Using lignin as the raw material for carbohydrate dehydration reaction catalyst has the advantages of turning waste into wealth, solving environmental pollution, and sustainable development, but there is no report in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The residual lignin sample was dried at 105°C, and 10g of dry lignin was carbonized at 400°C for 10h under the protection of an inert gas to obtain a black solid Powder, porous carbon carrier:concentrated sulfuric acid mass ratio 1:5, black solid powder washed with deionized water and dried to obtain lignin-based solid acid.

[0022] Add 10mL deionized water to the autoclave, preheat to 80°C, then add 0.5g lignin-based solid acid and 2g fructose, stir, heat to 150°C within 10min, and react at constant temperature for 300min. After the reaction, samples were taken and cooled with cold water at 0-20° C., diluted with ultrapure water, and analyzed by liquid chromatography for the content of fructose and 5-hydroxymethylfurfural. The conversion rate of fructose was 100%, and the yield of 5-hydroxymethylfurfural was 16%.

Embodiment 2

[0024] The residual lignin sample was dried at 105°C, and 10g of dry lignin was carbonized at 400°C for 5 hours under the protection of an inert gas to form a porous carbon carrier, and the porous carbon carrier was sulfonated with 98% concentrated sulfuric acid at 200°C for 10 hours to obtain a black solid Powder, porous carbon carrier:concentrated sulfuric acid mass ratio 1:10, washed with deionized water and dried to obtain lignin-based solid acid.

[0025] Add 20mL of deionized water to the autoclave, preheat to 80°C, then add 1g of lignin-based solid acid and 4g of fructose, stir, heat to 150°C within 5min, and react at constant temperature for 60min. After the reaction, samples were taken and cooled with cold water at 0-20° C., diluted with ultrapure water, and analyzed by liquid chromatography for the content of fructose and 5-hydroxymethylfurfural. The conversion rate of fructose was 100%, and the yield of 5-hydroxymethylfurfural was 39%.

Embodiment 3

[0027] The residual lignin sample was dried at 105°C, and 10g of dry lignin was carbonized at 400°C for 5 hours under the protection of an inert gas to form a porous carbon carrier, and the porous carbon carrier was sulfonated with 98% concentrated sulfuric acid at 200°C for 5 hours to obtain a black solid Powder, porous carbon carrier:concentrated sulfuric acid mass ratio 1:10, washed with deionized water and dried to obtain lignin-based solid acid.

[0028] Add 2g of [Bmim]Cl into the microwave reactor, heat to 120°C within 5min, then add 0.2g of lignin-based solid acid and 0.2g of fructose, stir, and react at constant temperature for 30min. After the reaction, samples were taken and cooled with cold water at 0-20° C., diluted with ultrapure water, and analyzed by liquid chromatography for the content of fructose and 5-hydroxymethylfurfural. The conversion rate of fructose was 85%, and the yield of 5-hydroxymethylfurfural was 71%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing 5-hydroxymethylfurfural by solid acid catalysis. The method comprises the following steps of taking lignin residue hydrolyzed by biomass as carrier raw material of solid acid; synthesizing the raw material into solid acid through a two-step way of carbonization and sulfonation, so that the waste material is recycled and the problem of disposal of pollutants is solved. In the dehydration reaction of lignin-based solid acid catalyzed fructose and glucose, the yield of 5-hydroxymethylfurfural can be respectively 84% and 68%; after the dehydration reaction, the lignin-based solid acid is easy to separate and reusable, the acid density of the solid acid can be reduced after being reused five times, and the yield of the 5-hydroxymethylfurfural is still higher than 75%. The method provided by the invention can be used for realizing emission without pollution, and is helpful for realizing environment-friendly producing process of 5-hydroxymethylfurfural.

Description

technical field [0001] The invention belongs to the technical field of renewable energy production, and in particular relates to a method for preparing 5-hydroxymethylfurfural by using a solid acid catalyst. Background technique [0002] Oil, natural gas and coal have always been important sources of energy and chemical raw materials for human beings. However, with the increasingly serious environmental pollution and energy problems caused by the combustion of fossil fuels, the development of biomass energy and the reduction of dependence on mineral energy have become a priority for many countries. important energy strategy. Among many possible bio-based chemicals, 5-Hydroxymethylfurfural is an important chemical for the production of chemicals from biomass, which can be directly converted into various products with high added value and new polymer materials, such as pharmaceuticals , resinous plastics, diesel fuel additives, etc. [0003] Heterogeneous acid catalysts have...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/46B01J27/02B01J32/00B01J21/18
Inventor 郭峰方真
Owner XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com