Check patentability & draft patents in minutes with Patsnap Eureka AI!

Straw chemical production method based on concentrated acid low-temperature hydrolysis and acid circulation

A chemical and hydrolysis reaction technology, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of affecting microbial fermentation, high-cost toxic by-products, etc., and achieve the effect of avoiding high costs

Pending Publication Date: 2022-05-27
SICHUAN UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of high cost of lignocellulosic biomass pretreatment in the prior art or many toxic by-products in the pretreatment process affecting subsequent microbial fermentation, the embodiment of the present invention provides a lignocellulosic biomass pretreatment Treatment methods and chemical preparation methods

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
  • Straw chemical production method based on concentrated acid low-temperature hydrolysis and acid circulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] A pretreatment method for corn stover, comprising:

[0088] S1. Dissolve the lignocellulosic biomass with a sulfuric acid solution with a mass fraction of 70% at 30°C to obtain a soluble polysaccharide solution;

[0089] S2. in the soluble polysaccharide solution, add water to dilute to adjust the mass fraction of sulfuric acid in the soluble polysaccharide solution to 20%, and after the hydrolysis reaction, obtain a monosaccharide hydrolyzate; the mass ratio of lignocellulosic biomass to sulfuric acid solution is 1:1; the temperature of the hydrolysis reaction is 60°C; the hydrolysis time is 0.5 hours;

[0090] S3. decolorizing the monosaccharide hydrolyzate to obtain a decolorized monosaccharide hydrolyzate;

[0091] S4. The decolorized monosaccharide hydrolyzate is used to separate the acid and the sugar with a chromatographic separation column filled with a strong acid-resistant cation exchange resin, and the sugar liquid phase and the acid liquid phase are obtaine...

Embodiment 2

[0095] A pretreatment method for corn stover, comprising:

[0096] S1. Dissolve the lignocellulosic biomass with a sulfuric acid solution with a mass fraction of 80% at 60°C to obtain a soluble polysaccharide solution;

[0097] S2. adding water to the soluble polysaccharide solution for dilution to adjust the mass fraction of sulfuric acid in the soluble polysaccharide solution to 35%, and after the hydrolysis reaction, monosaccharide hydrolyzed solution is obtained; the mass ratio of lignocellulosic biomass to sulfuric acid solution is 1:2; the temperature of the hydrolysis reaction is 80°C; the hydrolysis time is 1.5 hours;

[0098] S3. decolorizing the monosaccharide hydrolyzate to obtain a decolorized monosaccharide hydrolyzate;

[0099] S4. The decolorized monosaccharide hydrolyzate is used to separate the acid and the sugar with a chromatographic separation column filled with a strong acid-resistant cation exchange resin, and the sugar liquid phase and the acid liquid p...

Embodiment 3

[0103] A pretreatment method for corn stover, comprising:

[0104] S1. Dissolve the lignocellulosic biomass with a sulfuric acid solution with a mass fraction of 75% at 50°C to obtain a soluble polysaccharide solution;

[0105] S2. adding water to the soluble polysaccharide solution for dilution to adjust the mass fraction of sulfuric acid in the soluble polysaccharide solution to 20-35%, and after the hydrolysis reaction, monosaccharide hydrolyzed solution is obtained; the mass of lignocellulosic biomass and sulfuric acid solution The ratio is 1:1.5; the temperature of the hydrolysis reaction is 75°C; the hydrolysis time is 1 hour;

[0106] S3. decolorizing the monosaccharide hydrolyzate to obtain a decolorized monosaccharide hydrolyzate;

[0107] S4. The decolorized monosaccharide hydrolyzate is used to separate the acid and the sugar with a chromatographic separation column filled with a strong acid-resistant cation exchange resin, and the sugar liquid phase and the acid l...

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 embodiment of the invention provides a pretreatment method of lignocellulose biomass and a chemical preparation method, and aims to solve the technical problem that subsequent microbial fermentation is affected by high cost or many toxic and side products in the pretreatment process of the lignocellulose biomass in the prior art. Comprising the following steps: S1, dissolving lignocellulose biomass with a sulfuric acid solution with the mass fraction of 70-80% at 30-60 DEG C to obtain a soluble polysaccharide solution; s2, water is added into the soluble polysaccharide solution for dilution so as to adjust the mass fraction of sulfuric acid in the soluble polysaccharide solution to 20-35%, and monosaccharide hydrolysate is obtained after hydrolysis reaction. According to the embodiment of the invention, the defect that the subsequent microbial fermentation is influenced by high cost or more toxic and side products in the pretreatment process in the pretreatment of lignocellulose biomass in the prior art is overcome.

Description

technical field [0001] The invention relates to a pretreatment method for lignocellulosic biomass and a chemical preparation method. Background technique [0002] Replacing traditional fossil resources with biomass resources and realizing resource substitution is the key to solving problems such as environmental pollution and resource shortages and achieving sustainable social and economic development. Lignocellulosic biomass represented by straw with huge reserves and annual output is the main biomass resource on earth. The development of technologies for producing bioenergy and important small molecule platform compounds using lignocellulosic biomass as raw materials is the basis for realizing resource substitution. [0003] Lignocellulosic biomass such as straw contains three major components: cellulose, hemicellulose and lignin, of which cellulose and hemicellulose account for 60%-70%, and after hydrolysis, monosaccharides such as glucose and xylose are generated , usi...

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
IPC IPC(8): C12P7/10C12P7/18C12R1/865
CPCC12P7/10C12P7/18C12P2201/00C12P2203/00Y02E50/10
Inventor 汤岳琴吴晓磊柳泽深孙照勇谢采芸
Owner SICHUAN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com