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Solvent for separating biomass, and application thereof in selective separation of biomass

A biomass and solvent technology, used in applications, pulping with organic solvents, food science, etc., to achieve the effects of reducing pollution, easy modification, reducing dehydration process and energy consumption requirements

Inactive Publication Date: 2011-09-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Solvent for separating biomass, and application thereof in selective separation of biomass
  • Solvent for separating biomass, and application thereof in selective separation of biomass
  • Solvent for separating biomass, and application thereof in selective separation of biomass

Examples

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Embodiment 1

[0037] The ionic liquid used in this embodiment is [Bmin]Br (1-butyl-3-methylimidazolium bromide), the organic solvent is ethanol, and deionized water that has been distilled once. Mix the ionic liquid and ethanol according to different ratios (0:1, 1:9, 2:8, 3:7, 4:6), add water with 30% of the volume of the ionic liquid, mix it with the 40-mesh powder of masson pine and add it to the sealed In the container, the reaction container was heated, kept warm after reaching the reaction temperature of 150° C., stirred for 2 hours, taken out, and naturally cooled to room temperature. Filtration and separation, drying the filter residue at 105°C for 24 hours to obtain cellulose, adding deionized water equivalent to 10 times the volume of the filtrate to the separated filtrate, and secondary filtration and separation; the separated filter residue is lignin, collected and dried for later use; The secondary separation filtrate includes ionic liquids and hemicellulose degradation product...

Embodiment 2

[0044]The ionic liquid used in this embodiment is [Bmin]Br (1-butyl-3-methylimidazolium bromide), the organic solvent is ethanol, and deionized water that has been distilled once. Mix the ionic liquid and ethanol according to different ratios (5:5, 6:4, 7:3, 8:2, 9:1), add water with 20% of the volume of the ionic liquid, mix it with the 60-mesh powder of masson pine and add it to the sealant In the container, the reaction container was heated, kept warm after reaching the reaction temperature of 190° C., stirred for 2 hours, taken out, and naturally cooled to room temperature. Filtration and separation, when almost no filter residue is obtained, add deionized water equivalent to 10 times the volume of the filtrate to the separated filtrate, and perform secondary filtration and separation; the separated filter residue is lignin, which is collected and dried for later use; the secondary separation filtrate includes ionic liquid As well as cellulose and hemicellulose degradation...

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Abstract

The invention relates to a solvent for separating biomass, and application thereof in selective separation of biomass. The system consists of ionic liquid, an organic solvent and water, wherein the ionic liquid is imidazole ionic liquid; the organic liquid comprises one or a plurality of methanol, ethanol, formic acid, acetic acid, dioxane or tetrahydrofuran; the components of the mixed solvent are conditioned according to the dissolution and hydrogen bond theories; and the mixed solvent is capable of hydrolyzing semicellulose and lignin under a certain hydrogen bond capability and a dissolution parameter and reserving solid high purity cellulose, and is capable of completely dissolving and hydrolyzing the biomass under another hydrogen bond capability and another dissolution parameter. By adding the water for precipitation and filtering for separation, crude lignin and hydrolysis sugar of carbohydrate can be obtained. The biomass can be selectively separated and transformed by controlling the mixing ratio of the three components; besides, the application of the solvent for separating biomass is moderate in condition, simple in process and environment-friendly; furthermore, all the components of the solvent system can be recovered and reused.

Description

technical field [0001] The invention relates to a solvent system and method for clean and gentle separation and conversion of biomass, in particular to a solvent for separating biomass and its application in selective separation of biomass. Background technique [0002] With the increasing scarcity of petroleum resources, biomass (Biomass) has become one of the most important alternative resources of petroleum. Biomass is composed of cellulose, hemicellulose and lignin, hemicellulose and lignin are linked by covalent bonds to form a network structure, cellulose is embedded in it, and hemicellulose and lignin are connected by hydrogen bonds. Both cellulose and hemicellulose are important chemical raw materials, which can be modified and transformed, or hydrolyzed and fermented to produce ethanol, while lignin is the only source of phenols in renewable resources. To separate the three components, the covalent bonds between hemicellulose and lignin are broken, and the hydrogen...

Claims

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Application Information

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IPC IPC(8): D21C3/20C08H7/00C08B37/14C13K13/00C07D307/50
CPCY02P20/54
Inventor 常杰余华明范娟胡茄
Owner SOUTH CHINA UNIV OF TECH
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