Method for directional liquefaction of woody biomass to obtain high value-added chemicals and comprehensive utilization of liquefaction residue

A liquefaction residue, high value-added technology, applied in chemical instruments and methods, organic chemistry, textiles and papermaking, etc., can solve problems such as the difficulty of rational utilization, achieve low price, simple solvent recovery operation, and improve the conversion rate.

Inactive Publication Date: 2017-03-15
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization of cellulose and hemicellulose is mainly through chemical catalysis or biological fermentation to obtain compounds such as ethanol, furan and furfural; due to the complex structure of lignin macromolecules, there are still some difficulties in their rational utilization

Method used

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  • Method for directional liquefaction of woody biomass to obtain high value-added chemicals and comprehensive utilization of liquefaction residue
  • Method for directional liquefaction of woody biomass to obtain high value-added chemicals and comprehensive utilization of liquefaction residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 2g of absolute dry weight bamboo, add 16g of methanol and 0.05g of sulfuric acid into a polytetrafluoroethylene reactor with a volume of 100mL, seal the high-pressure reactor, and put it into a microwave reaction system. Stir. It took 5 minutes to raise the temperature to 180°C, and the temperature was raised to 180°C for 10 minutes. After the reaction was completed, the temperature in the reactor was rapidly cooled to room temperature through cooling water. Open the reaction kettle, filter the directly pressurized liquefied product to obtain residue and filtrate. The filtrate was neutralized with NaOH solution, and the liquefied low-carbon alcohol solvent was recovered by rotary evaporation. The liquid product was added to 20 g of distilled water, resulting in a water-soluble phase and a water-insoluble phase. The water-soluble phase was poured out, and 0.67 g of the water-soluble phase product was obtained after rotary evaporation of distilled water. The wat...

Embodiment 2

[0040]Weigh 2g of dry weight bamboo, add 16g of methanol and 0.1g of sulfuric acid into a polytetrafluoroethylene reaction kettle with a volume of 100mL, seal the high-pressure reaction kettle, and put it into a microwave reaction system. The microwave reaction system includes microwave reaction and constant uniform magnetic force Stir. It took 5 minutes to raise the temperature to 180°C, and the temperature was raised to 180°C for 10 minutes. After the reaction was completed, the temperature in the reactor was rapidly cooled to room temperature through cooling water. Open the reaction kettle, filter the directly pressurized liquefied product to obtain residue and filtrate. The filtrate was neutralized with NaOH solution, and the liquefied low-carbon alcohol solvent was recovered by rotary evaporation. The liquid product was added to 20 g of distilled water, resulting in a water-soluble phase and a water-insoluble phase. The water-soluble phase was poured out, and 0.71 g of...

Embodiment 3

[0042] Weigh 2g of absolute dry weight bamboo, add 16g of methanol and 0.2g of sulfuric acid into a polytetrafluoroethylene reactor with a volume of 100mL, seal the high-pressure reactor, and put it into a microwave reaction system. Stir. It took 5 minutes to raise the temperature to 180°C, and the temperature was raised to 180°C for 10 minutes. After the reaction was completed, the temperature in the reactor was rapidly cooled to room temperature through cooling water. Open the reaction kettle, filter the directly pressurized liquefied product to obtain residue and filtrate. The filtrate was neutralized with NaOH solution, and the liquefied low-carbon alcohol solvent was recovered by rotary evaporation. The liquid product was added to 20 g of distilled water, resulting in a water-soluble phase and a water-insoluble phase. The water-soluble phase was poured out, and after rotary evaporation of distilled water, 0.60 g of the water-soluble phase product was obtained. The wat...

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Abstract

The invention relates to a method for directional liquefaction of woody biomass to obtain high value-added chemicals and comprehensive utilization of liquefaction residue. The method includes: step 1, directional liquefaction reaction of woody fiber biomass: subjecting a biomass raw material, low carbon alcohol and an acidic catalyst to alcoholysis liquefaction reaction in a microwave liquefaction reaction system; step 2, a process of directional extraction separation to obtain chemicals: filtering the direct liquefaction product to obtain residue and filtrate, neutralizing the filtrate with a NaOH solution, and subjecting the neutralization solution to rotary evaporation of solvent to obtain a liquefaction product, adding distilled water into the liquefaction product, and performing extraction separation to obtain a phenol compound; and step 3, a process of comprehensive utilization of residue: adding low carbon alcohol into the liquefaction residue, performing stirring to dissolve the surface lignin degradation product components into the low carbon alcohol solvent, and filtering the solvent to obtain an off-white solid, and further performing cleaning by a dilute alkali solution and conducting ultrasonic washing, thus obtaining a white cellulose solid.

Description

technical field [0001] The invention belongs to the field of biomass energy utilization, and mainly relates to a method for preparing high additional chemicals through pressurized liquefaction of biomass and its comprehensive utilization. Background technique [0002] Biomass energy is a kind of abundant renewable energy. Through the efficient and reasonable utilization of biomass energy, it can alleviate the pressure of society's demand for fossil fuels, and can protect the environment and reduce the emission of harmful gases. Biomass is mainly composed of three components: hemicellulose, cellulose and lignin. At present, the utilization of cellulose and hemicellulose is mainly through chemical catalysis or biological fermentation to obtain compounds such as ethanol, furan and furfural; due to the constraints of the complex structure of lignin macromolecules, there are still some difficulties in their rational utilization. Lignin accounts for 15-30% of the whole lignocellu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/00C07C37/72C07C37/68C07C39/00D21B1/30D21C5/00
CPCC07C37/004C07C37/685C07C37/72D21B1/306D21C5/00C07C39/00
Inventor 蒋剑春冯君锋徐俊明王奎应浩杨中志
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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