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High-value comprehensive utilization method of bagasse fibers

A bagasse fiber and high-value technology, which is applied in the field of high-value comprehensive utilization, can solve the problems of low economic benefit, ignoring the utilization of other components, and less consideration for the comprehensive utilization of hemicellulose and lignin, so as to achieve the goal of reducing resources The effect of consumption and emission reduction of pollutants

Inactive Publication Date: 2014-12-10
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although some progress has been made in the research on the conversion and utilization of lignocellulosic raw materials at home and abroad, it is often to use one of the components to produce a single product, ignoring the utilization of other components, and the economic benefits are low.
For pretreatment, the current various pretreatment methods mainly consider how to maximize the utilization of cellulose in lignocellulosic raw materials, and less consideration is given to the comprehensive utilization of hemicellulose and lignin

Method used

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  • High-value comprehensive utilization method of bagasse fibers
  • High-value comprehensive utilization method of bagasse fibers
  • High-value comprehensive utilization method of bagasse fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown, weigh 500 grams of dry bagasse raw material and place it in a closed reactor equipped with a thermocouple, add 4000 mL of water / ethanol solution (60 / 40, v / v), and add 25 grams of acetic acid, turn on stirring, heating system , make the temperature rise to 180 ℃ quickly and start timing, when the reaction time reaches 60 minutes, stop heating, and immediately use condensed water to bring the reaction down to room temperature, and use the method of filtration to separate the pretreatment liquid and the pretreatment residue.

[0034] Take 1000 mL of ethanol pretreatment solution, add 2000 mL of deionized water, and then the solvent lignin begins to precipitate, and the solvent lignin is separated from the diluted pretreatment solution by centrifugation. Add 50 mL of diluted pretreatment solution to 250 mL of 3% (w / w) H 2 SO 4 and boiled for 4h to hydrolyze the xylo-oligosaccharides into xylose, and determine the xylose content by ion chromatograph...

Embodiment 2

[0038] Weigh 500 grams of dry bagasse raw material and place it in a closed reactor equipped with a thermocouple, add 4000 mL of water / ethanol solution (60 / 40, v / v), and add 25 grams of acetic acid, open the stirring and heating system, and make the temperature Rapidly rise to 190°C and start timing. When the reaction time reaches 60 minutes, stop heating, and immediately cool the reaction to room temperature with condensed water, and separate the pretreatment liquid and the pretreatment residue by filtration.

[0039] Take 1000 mL of ethanol pretreatment solution, add 2000 mL of deionized water, and then the solvent lignin begins to precipitate, and the solvent lignin is separated from the diluted pretreatment solution by centrifugation. Add 50 mL of diluted pretreatment solution to 250 mL of 3% (w / w) H 2 SO 4 and boiled for 4h to hydrolyze the xylo-oligosaccharides into xylose, and determine the xylose content by ion chromatography.

[0040] Take 20 grams of pretreatment r...

Embodiment 3

[0043] Weigh 500 grams of dry bagasse raw material and place it in a closed reactor equipped with a thermocouple, add 4000 mL of water / ethanol solution (60 / 40, v / v), and add 25 grams of acetic acid, open the stirring and heating system, and make the temperature Rapidly rise to 190°C and start timing, when the reaction time reaches 45 minutes, stop heating, and immediately cool the reaction to room temperature with condensed water, and separate the pretreatment liquid and the pretreatment residue by filtration.

[0044] Take 1000 mL of ethanol pretreatment solution, add 2000 mL of deionized water, and then the solvent lignin begins to precipitate, and the solvent lignin is separated from the diluted pretreatment solution by centrifugation. Add 50 mL of diluted pretreatment solution to 250 mL of 3% (w / w) H 2 SO4 and boiled for 4h to hydrolyze the xylo-oligosaccharides into xylose, and determine the xylose content by ion chromatography.

[0045] Take 20 grams of pretreatment res...

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Abstract

The invention provides a high-value comprehensive utilization method of bagasse fibers, which comprises the steps of preparation of xylooligosaccharide and solvent lignin by ethanol / water solution pretreatment, preparation of glucose by enzymolysis and the like. The method specifically comprises the following steps: mixing aired and pulverized bagasse raw material with the ethanol / water solution (v / v, 40 / 60-80 / 20), carrying out pretreatment at 160-200 DEG C in the presence of 0-10 wt% acetic acid for 30-90 minutes to obtain a pretreated solution, and adding a composite cellulase into the pretreated residue to carry out enzymolysis, thereby obtaining the enzymolysis saccharification solution and enzymolysis residue. The ethanol adopted in the pretreatment can be recovered by distillation, thereby reducing the chemical consumption, lowering the pollutant emission and relieving the environmental pollution. The ethanol pretreatment implements coproduction of the xylooligosaccharide and solvent lignin, and enhances the subsequent enzymolysis and saccharification efficiency; and the enzymolysis performed on the pretreated residue can convert the cellulose in the raw material into glucose, thereby implementing comprehensive utilization of the three major components in the wood fiber raw material.

Description

technical field [0001] The invention relates to a high-value comprehensive utilization method of three components of plant wood fiber, in particular to a high-value comprehensive utilization method of bagasse fiber. Background technique [0002] Under the increasingly prominent problems of energy shortage and ecological environment, biomass raw materials are being paid more and more attention as a renewable resource. Among the abundant biomass resources on the earth, because lignocellulosic raw materials are rich in cellulose, hemicellulose and lignin, more and more attention has been paid to their utilization, such as the use of lignocellulosic raw materials to produce fuel ethanol, butanol, sorbitol , ethylene glycol, xylitol, furfural, hydroxymethyl furfural and their hydrocarbon fuels. [0003] Although some progress has been made in the research on the transformation and utilization of lignocellulosic raw materials at home and abroad, one of the components is often use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02
Inventor 武书彬张红丹
Owner SOUTH CHINA UNIV OF TECH
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