A method for depolymerizing biomass and coproducing furfural, cellulose and lignin

A biomass and cellulose technology, applied in the direction of lignin derivatives, chemical instruments and methods, organic chemistry, etc., can solve the problems of shortening reaction time, many reaction steps, high reaction temperature, etc., to solve the problem of many reaction steps and reduce production The effect of low cost and reaction temperature

Active Publication Date: 2020-07-03
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for depolymerizing biomass to co-produce furfural, cellulose and lignin. In a mixed solvent of water and acetone, the depolymerization and separation of biomass are catalyzed in the next step of synergistic action of phosphoric acid and sulfuric acid, so as to effectively reduce the production of furfural Higher reaction temperature and shortened reaction time, realize energy saving and emission reduction, greatly reduce the production cost of furfural products, and at the same time realize high production of furfural products and efficient separation of lignin and cellulose components in biomass raw materials, and the purity of cellulose in residues is extremely high , can be used again as a commodity or raw material, and solve the problems of many reaction steps, high reaction temperature, long reaction time, low yield and inefficient separation of components in the existing furfural production process

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

[0017] Sieve the dried and pulverized corncobs, put the corncobs passing through 20-40 meshes into the high-pressure reactor, then add a mixed solution composed of water and acetone, and add phosphoric acid and sulfuric acid to make the reaction substrate in the system The mass concentration is 5%, the volume ratio of water in the mixed solution is 10%, the mass concentration of phosphoric acid in the solution is 20%, and the mass concentration of sulfuric acid in the solution is 2%. After closing the reactor, nitrogen gas was introduced to make the system pressure 0.5 MPa. Turn on the temperature control system (electric heating) of the reaction device to heat the high-pressure reactor, start timing when it is heated to 160°C, stop heating after 5 minutes of reaction and release the material, and perform solid-liquid separation. The solid acid residue after separation is high Purity cellulose, the separated liquid is neutralized and filtered first, and then the supernatant is...

Embodiment 2

[0019] The dried and pulverized bagasse is sieved, and the bagasse material of 40-60 meshes is added to the high-pressure reactor, and a mixed solution composed of water and acetone is added, and then phosphoric acid and sulfuric acid are added dropwise, so that the reaction substrate in the system The mass concentration is 7%, the volume ratio of water in the mixed solution is 25%, the content of phosphoric acid in the solution is 30.5% (mass fraction), and the content of sulfuric acid in the solution is 0.5% (mass fraction). After closing the reactor, nitrogen gas was blown in to increase the pressure to 1.5 MPa. Turn on the temperature control system (electric heating) of the reaction device to heat the high-pressure reactor, start timing when the temperature reaches 150° C., stop heating after 5 minutes of reaction and release the material. Carry out solid-liquid separation, the separated solid acid residue is high-purity cellulose, the separated liquid is first neutralize...

Embodiment 3

[0023] Sieve the dried and pulverized corn stalks, put the 40-60 mesh corn stalks into the high-pressure reactor, add a mixed solution composed of water and acetone, and then add phosphoric acid and sulfuric acid, so that the mass of the reaction substrate in the system The concentration is 10%, the volume ratio of water in the mixed solution is 30%, the mass fraction of phosphoric acid in the solution is 40%, and the content of sulfuric acid in the solution is 0.5% (mass fraction). After closing the reactor, it was pressurized to 2 MPa using nitrogen gas. Turn on the temperature control system (electric heating) of the reaction device to heat the high-pressure reactor, start timing when the temperature reaches 170° C., stop heating after 10 minutes of reaction and release the material. Carry out solid-liquid separation, the separated solid acid residue is high-purity cellulose, the separated liquid is first neutralized and filtered, and then the supernatant is subjected to va...

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 co-producing furaldehyde, cellulose and lignin by depolymerizing biomasses. According to the method, in a mixed solvent of water and acetone, depolymerization andseparation of the biomasses are catalyzed in a one-step manner under the synergistic effect of phosphoric acid and sulfuric acid, the reaction temperature of furaldehyde production is effectively reduced, the reaction time of furaldehyde production is effectively shortened, energy conservation and emission reduction are achieved, the production cost of furaldehyde products is greatly reduced, highyield of the furaldehyde products is achieved, lignin components and cellulose components in biomass raw materials are efficiently separated, the purity of cellulose in residues is high, the cellulose can serve as a commodity or a raw material to be reused, and the method solves the problems that according to an existing furaldehyde production process, reaction steps are more, reaction temperature is high, reaction time is long, yield is low, and components cannot be efficiently separated.

Description

Technical field: [0001] The invention relates to the technical field of biomass energy chemical industry, in particular to a method for co-producing furfural, cellulose and lignin by depolymerizing biomass. Background technique: [0002] Furfural is an important chemical intermediate. Furfural and its derivatives have broad application prospects in the fields of solvents, resin synthesis, fragrances, cosmetics, plastics and nylon products. From the beginning of industrial production of furfural in 1922 to the present, the production process of furfural used in industry belongs to one-step production process. One-step method means that the hydrolysis of hemicellulose to pentose and the dehydration and cyclization of pentose are completed in the same hydrolysis pot. The commonly used process conditions are that the biomass is reacted at high temperature (140-185° C.) for 3-10 hours, and the amount of sulfuric acid is 3%. Limited by various conditions, the maximum yield of fur...

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): C07D307/48C07D307/50C08H7/00C07G1/00D21C3/04D21C3/20
CPCC07D307/48C07D307/50C07G1/00C08H6/00D21C3/04D21C3/20
Inventor 王琼亓伟刘姝娜余强王闻谭雪松庄新姝袁振宏王忠铭
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap