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

Method for increasing total-component utilization rate of agricultural straw raw materials

A technology with full components and high utilization rate, applied in the direction of fermentation, etc., can solve the problems of difficult cleaning of lignin and high reaction temperature, and achieve the effect of good washing effect, high reactivity and simple method

Inactive Publication Date: 2018-01-09
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods still have the disadvantages of relatively high reaction temperature, and in the subsequent washing steps, the lignin is difficult to wash and have limitations.

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 increasing total-component utilization rate of agricultural straw raw materials
  • Method for increasing total-component utilization rate of agricultural straw raw materials
  • Method for increasing total-component utilization rate of agricultural straw raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The pretreatment and enzymolysis of different NaOH mass fractions of embodiment 1

[0030]Wheat straw is selected as the raw material, cut into 3-5 cm grass slices manually or mechanically, washed with water and air-dried, crushed with a pulverizer, and sieved with a standard sieve to collect 40-80 mesh particles. Select sodium hydroxide as an additive, ethanol as an organic solvent, add a certain mass of NaOH to the ethanol solution with a volume fraction of 50%, and configure NaOH with a mass fraction of 0.2%, 1%, and 1.8% respectively. For the treatment agent, the solid-to-liquid ratio is 1:10g / ml, the reaction temperature is 130°C, the holding time is 3h, and the solid-liquid separation is carried out by vacuum filtration after the reaction is completed. The solid was washed with a large amount of ultrapure water to neutrality and then dried at 40°C. Calculate the yield and analyze the chemical composition of the material. Add acetic acid-sodium acetate buffer (pH...

Embodiment 2

[0037] The pretreatment of embodiment 2 different temperatures

[0038] Wheat straw is selected as the raw material, cut into 3-5 cm grass slices manually or mechanically, washed with water and air-dried, crushed with a pulverizer, and sieved with a standard sieve to collect 40-80 mesh particles. Select sodium hydroxide as additive, ethanol as organic solvent, configure sodium hydroxide mass fraction as 1%, ethanol volume fraction as sodium hydroxide-ethanol pretreatment agent of 50%, solid-liquid ratio 1: 10g / ml, reaction temperature respectively 90°C and 170°C, the holding time is 3h, after the reaction is completed, vacuum filtration is carried out for solid-liquid separation. The solid was washed with a large amount of ultrapure water to neutrality and then dried at 40°C. Calculate the yield and analyze the chemical composition of the material. Add acetic acid-sodium acetate buffer (pH=4.8) to the solid material to maintain a solid-liquid ratio of 1:40g / ml, add 30FPU / g c...

Embodiment 3

[0042] The pretreatment of embodiment 3 different types of alkaline additives

[0043] Wheat straw is selected as the raw material, cut into 3-5 cm grass slices manually or mechanically, washed with water and air-dried, crushed with a pulverizer, and sieved with a standard sieve to collect 40-80 mesh particles. Choose sodium hydroxide, potassium hydroxide and ammonia water as alkaline additives respectively, ethanol as organic solvent, add the alkali into the ethanol solution with a volume fraction of 50%, and configure sodium hydroxide and potassium hydroxide with a mass fraction of alkali of 1% respectively Alkaline ethanol pretreatment agent with ammonia water, the solid-liquid ratio is 1:10g / ml, the reaction temperature is 130°C, the holding time is 3h, and the solid-liquid separation is carried out by vacuum filtration after the reaction. The solid was washed with a large amount of ultrapure water to neutrality and then dried at 40°C. Calculate the yield and analyze the ...

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 increasing the total-component utilization rate of agricultural straw raw materials. The method comprises steps as follows: firstly, a low-boiling-point organic solvent system with alkali as an additive is taken as a pretreatment agent for treating the agricultural straw raw materials; after the pretreatment, the materials are subjected to solid-liquid separation, and the solid part is a material rich in carbohydrates and can be converted to fermentable sugar through enzymolysis with a cellulase solution (prepared from cellulase and beta-glucosidase); afterthe liquid part is evaporated and concentrated, lignin in the liquid part can be precipitated and recovered with an acid precipitation method. By means of combined application of alkali and an organic solvent, not only is lignin effectively separated from the raw materials under milder conditions, but also certain inhibition effect on degradation of the carbohydrates is achieved, and the utilization rate of the raw materials is effectively increased.

Description

technical field [0001] The invention relates to a method for improving the utilization rate of all components of agricultural straw raw materials, and belongs to the technical field of transformation and utilization of renewable energy and agricultural and forestry biomass resources. Background technique [0002] my country is a large agricultural country, and about 700 million tons of agricultural waste is formed every year. Except for a few straws that are used as livestock feed, farm manure and rural fuel, most straws are piled up or directly burned, which not only causes a huge waste of biomass resources , but also bring serious environmental pollution problems. Using agricultural waste such as wheat straw and corn stalks as raw materials, pretreatment to obtain lignin products, and then obtaining fermentable sugar liquid through enzymatic hydrolysis is an important way to rationally utilize waste biomass resources. The energy crisis and the realization of sustainable de...

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): C12P19/02C08H7/00
Inventor 沈葵忠周静房桂干盘爱享张华兰林艳施英乔邓拥军韩善明焦健丁来保田庆文梁龙李红斌
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Features
  • Generate Ideas
  • 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