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

Method for grading biomass, preparing furfural and preparing levulinic acid through two steps

A technology of levulinic acid and grading treatment, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate and other directions, can solve the problems of being easily affected by acid, increasing reaction paths, obtaining target fuels, etc. The effect of less impurities, less by-products and high equipment requirements

Active Publication Date: 2015-01-21
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty in the implementation of this technology is that the direct depolymerization of solid lignocellulose often requires strong acid high temperature and high pressure conditions, which increases the reaction path and makes it difficult to obtain target fuels and / or chemicals in high yields; / or the necessary purification of the target product, its industrial application is seriously hindered, for example, the high value-added chemical levulinic acid is usually obtained from the degradation of biomass with dilute inorganic acids, and the inorganic acids need to be produced in downstream processes, such as hydrogenation to γ - Before removal of Gamma valerolactone (GVL), if the acid is not removed, the downstream process will be easily affected by the acid, making it difficult to control

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for grading biomass, preparing furfural and preparing levulinic acid through two steps
  • Method for grading biomass, preparing furfural and preparing levulinic acid through two steps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method process of this embodiment is as figure 1 shown.

[0023]10g corncobs were soaked with 80mL phosphoric acid at 50°C for 60 minutes, added 300mL of pre-cooled acetone, stirred thoroughly, placed in a centrifuge, and centrifuged at 4000rpm for 20 minutes to separate the supernatant. Wash the residue after centrifugation with 300mL distilled water and filter. The residue obtained after filtration was used for later use, and the washing solution was hydrolyzed in an autoclave at 120° C. for 2 hours. After the reaction, the hydrolyzate was taken out and distilled. After cooling, it was detected by liquid chromatography that the yield of FF was 63%. 280mL of the hydrolyzed solution after removing FF and a small amount of organic solvent contains a small amount of acid. The distilled hydrolyzate is mixed with the residue after washing, and solid acid Amberlyst-70 (accounting for 1% of the total amount of liquid added in the reaction, ie 1.5wt%) is added, and plac...

Embodiment 2

[0030] The method process of this embodiment is as figure 1 shown.

[0031] Mix 10g of bagasse and 80mL of pre-cooled concentrated hydrochloric acid to form a uniform suspension, then slowly add 20mL of pre-cooled concentrated sulfuric acid in the fume hood several times, seal it and place it on a magnetic stirrer, and stir slowly for 60min. Add 300 mL of pre-cooled dioxane, stir slowly for about 30 min, then place in a centrifuge, centrifuge at 4000 rpm for 10 min, and separate the supernatant. Wash again with 200 mL of pre-cooled dioxane, centrifuge at 4000 rpm for 10 min, and separate the supernatant. The two supernatants can be mixed. Wash the centrifuged residue with 300 mL of distilled water and filter. The residue obtained after filtration was used for later use, and the washing solution was hydrolyzed in an autoclave at 110° C. for 1 hour. After the reaction, the hydrolyzate was taken out and distilled. After cooling, it was detected by liquid chromatography that t...

Embodiment 3

[0033] The method process of this embodiment is as figure 1 shown.

[0034] Mix 10g of bagasse and 80mL of pre-cooled concentrated hydrochloric acid to form a uniform suspension, then slowly add 20mL of pre-cooled concentrated sulfuric acid in the fume hood several times, seal it and place it on a magnetic stirrer, and stir slowly for 60min. Add 300 mL of pre-cooled dioxane, stir slowly for about 30 min, then place in a centrifuge, centrifuge at 4000 rpm for 10 min, and separate the supernatant. Wash again with 200 mL of pre-cooled dioxane, centrifuge at 4000 rpm for 10 min, and separate the supernatant. The two supernatants can be mixed. Wash the centrifuged residue with 300 mL of distilled water and filter. The residue obtained after filtration was used for later use, and the washing solution was hydrolyzed in an autoclave at 110° C. for 1 hour. After the reaction, the hydrolyzate was taken out and distilled. After cooling, it was detected by liquid chromatography that t...

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

PropertyMeasurementUnit
recovery rateaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for grading biomass, preparing furfural and preparing levulinic acid (LA) through two steps. The method comprises the following steps: processing a biomass raw material by using an acid / organic solvent combination system to separate lignose, hemicellulose and cellulose, converting hemicellulose into xylooligosaccharide, and converting cellulose into amorphous cellulose; extracting xylooligosaccharide by water, and converting xylooligosaccharide into furfural; and carrying out two-step acid hydrolysis on amorphous cellulose-based residues to make amorphous cellulose in residues converted into 5-HMF (5-hydroxymethylfurfural), introducing the 5-HMF to a second reactor with acidic environment, and carrying out acid hydrolysis to generate the LA. The method has the advantages of extremely high recovery rate / yield of sugar, FF and LA, few side reactions, high recovery rate and small chemical structure change of lignin, less water consumption, fast reaction, low requirements on a reactor, recycling of all reagents, and environmental protection.

Description

Technical field [0001] The invention relates to the field of chemical industry of biomass, and specifically relates to a method of utilizing biomass fractionation treatment containing hemicellulose and cellulose to prepare furfural and levulinic acid in a two-step process. Background technique [0002] Biomass contains a large amount of hemicellulose, cellulose and lignin. The traditional biomass conversion method is to depolymerize the biomass into sugars and then ferment it to produce ethanol or other energy sources. Now domestic and foreign research has found that in biomass Preparing chemicals on the basis of sugar platforms is more economical and practical. For example, xylose obtained by depolymerizing hemicellulose can be used to prepare furfural (FF). Furfural has active chemical properties and is an important organic chemical product. It can produce numerous derivatives through oxidation, condensation and other reactions. It is suitable for synthetic plastics, medi...

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 Applications(China)
IPC IPC(8): C07D307/50C07C59/185C07C51/00
CPCY02P20/582C07D307/50C07C51/00C07D307/46C07C59/185
Inventor 定明月王铁军马隆龙涂军令张琦陈伦刚
Owner GUANGZHOU INST OF ENERGY CONVERSION - 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