A kind of organic solvent-aqueous solution improves the method of acid-catalyzed ionic liquid pretreatment effect

An ionic liquid and organic solvent technology, applied in the field of fiber raw material pretreatment and separation, can solve the problems of increasing energy loss, high energy consumption, hindering the efficiency of enzymatic hydrolysis and saccharification, and achieve the effect of improving the effect, improving the efficiency and improving the economic feasibility.

Active Publication Date: 2020-01-10
BEIJING FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of spherical attachments on the fiber surface will form a physical barrier for cellulase adsorption, thus hindering the improvement of enzymatic hydrolysis and saccharification efficiency and increasing energy loss
In addition, aqueous solution is more likely to dissolve some low-molecular-weight compounds, which is not conducive to the recycling of IL
Compared with organic reverse-phase solvents such as acetonitrile, ethanol, acetone, etc., recycling and reuse of water reverse-phase solvents requires higher energy consumption

Method used

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  • A kind of organic solvent-aqueous solution improves the method of acid-catalyzed ionic liquid pretreatment effect
  • A kind of organic solvent-aqueous solution improves the method of acid-catalyzed ionic liquid pretreatment effect
  • A kind of organic solvent-aqueous solution improves the method of acid-catalyzed ionic liquid pretreatment effect

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 28.5g of ionic liquid [Bmim]Cl into a three-neck flask, preheat to 80°C to dissolve it. Add 1.5 g of Arundis stalk powder and heat to 120° C. for 3 h under mechanical stirring at 170 rpm. Subsequently, 0.3 g of solid acid Amberlyst 35DRY was added and incubated for 1.0 h. After the reaction, three times the volume of reverse phase solvent 50% ethanol-water solution was added, heated at 50° C. and stirred for 30 minutes. Centrifugation yielded an IL-rich solution and a solid residue. The solid residue was repeatedly washed with 50% ethanol-water solution for 6-7 times until the washing liquid was colorless. The washed solid residue was dried under vacuum at 45 °C for 24 h. Finally, sieve the solid residue to obtain the regeneration raw material of Phyllostachys arundis. Under the condition of 15FPU cellulase / g substrate, after 72 hours of enzymatic hydrolysis, the yield of monosaccharide is 98.7% (relative to the raw material glucose). Under the same enzymatic...

Embodiment 2

[0041] Weigh 28.5g of ionic liquid [Bmim]Cl into a three-neck flask, preheat to 80°C to dissolve it. Add 1.5 g of Arundis stalk powder and heat to 120° C. for 3 h under mechanical stirring at 170 rpm. Subsequently, 0.3 g of solid acid Amberlyst 35DRY was added and incubated for 1.0 h. After the reaction, three times the volume of reverse phase solvent 70% ethanol-water solution was added, heated at 50° C. and stirred for 30 minutes. Centrifugation yielded an IL-rich solution and a solid residue. The solid residue was repeatedly washed with 70% ethanol-water solution for 6-7 times until the washing liquid was colorless. The washed solid residue was dried under vacuum at 45 °C for 24 h. Finally, sieve the solid residue to obtain the regeneration raw material of Phyllostachys arundis. Under the condition of 15FPU cellulase / g substrate, after 72 hours of enzymatic hydrolysis, the monosaccharide yield was 97.3% (relative to the raw material glucose). Under the same enzymatic h...

Embodiment 3

[0043] Weigh 28.5g of ionic liquid [Bmim]Cl into a three-neck flask, preheat to 80°C to dissolve it. Add 1.5 g of Arundis stalk powder and heat to 120° C. for 3 h under mechanical stirring at 170 rpm. Subsequently, 0.3 g of solid acid Amberlyst 35DRY was added and incubated for 1.0 h. After the reaction, three volumes of reverse phase solvent 60% ethanol-water solution were added, heated at 50° C. and stirred for 30 minutes. Centrifugation yielded an IL-rich solution and a solid residue. The solid residue was repeatedly washed with 60% ethanol-water solution for 6-7 times until the washing liquid was colorless. The washed solid residue was dried under vacuum at 45 °C for 24 h. Finally, sieve the solid residue to obtain the regeneration raw material of Phyllostachys arundis. Under the condition of 15FPU cellulase / g substrate, after 72 hours of enzymatic hydrolysis, the yield of monosaccharide is 99.6% (relative to the raw material glucose). Under the same enzymatic hydroly...

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Abstract

The invention discloses a method for improving the pretreatment effect of acid catalysis ionic liquid with an organic solvent-aqueous solution. The method comprises the following steps: (1) smashing a fiber raw material; (2) adding the raw material into an ionic liquid-acid system for pretreatment and catalysis; (3) regenerating with an organic solvent-aqueous solution in an amount which is 2 to 5 times the volume of the raw material; (4) continually stirring; (5) centrifuging to obtain a coarse regenerated fiber raw material; (6) washing the coarse regenerated fiber raw material with a corresponding organic solvent-aqueous solution by 4 to 6 times, and drying to obtain a regenerated fiber raw material. By adopting the method disclosed by the invention, the structural characteristic of the fiber raw material is changed. The dense cell wall structure of fibers is broken, the prepared regenerated fiber raw material is porous on the surface, is less in sediment, and is lower in lignin content, and the problem of adhesion of a large amount of lignin sediment to the surface of a conventional regenerated fiber raw material and the problem of inhibition of enzymatic saccharification are solved.

Description

technical field [0001] The invention belongs to the technical field of pretreatment and separation of fiber raw materials, and in particular relates to a method for improving the pretreatment effect of an acid-catalyzed ionic liquid with an organic solvent-water solution. Background technique [0002] Using lignocellulosic raw materials to develop clean energy to replace traditional fossil energy is an effective way to alleviate energy and environmental crises. Lignocellulosic raw materials are mainly composed of cellulose, lignin and hemicellulose. Among them, cellulose is the most abundant renewable organic resource on the earth, and using it to develop biofuels such as bioethanol to replace fossil fuels has broad application prospects. Effective pretreatment can break the natural anti-degradation barrier of biomass, thereby improving the enzymatic hydrolysis and saccharification efficiency of lignocellulosic raw materials. [0003] In recent years, acidic ionic liquid p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/14C12P19/02
CPCC12P19/02C12P19/14C12P2201/00Y02P20/54
Inventor 许凤游婷婷王瑞珍张学铭
Owner BEIJING FORESTRY UNIVERSITY
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