Method for improving lignocellulose raw material enzymolysis efficiency and lignose recovery rate

A technology of lignocellulose and enzymatic hydrolysis efficiency, which is applied in the field of improving the enzymatic hydrolysis efficiency of reed bamboo fiber raw materials and the recovery rate of lignin, can solve the problems of low acetone separation efficiency, endangering the health of workers, and long volatilization time, etc., to achieve effective It is beneficial to environmental protection and the health of operators, improves economic feasibility, and shortens the effect of recycling time

Active Publication Date: 2016-07-13
山东银鹰化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned prior art has at least the following disadvantages: when the existing acid-catalyzed ionic liquid pretreatment is used to improve the enzymatic hydrolysis efficiency of fiber raw materials, the danger of strong acid is high, the requirements for the corrosion resistance of the reactor are high, and the acid after pretreatment The solution needs to be neutralized with a large amount of alkali, and there are problems such as difficulty in recovery
The recovery of lignin by two-phase extraction and membrane filtration is costly, and the hydrogen bond formed between ionic liquid and lignin is not easy to be destroyed under normal temperature conditions, resulting in low separation efficiency of acetone, and acetone is volatilized in the natural environment, and the volatilization time is long, and acetone is basically cannot be recycled
Acetone volatilizes into the air, seriously endangering the health of workers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 20g of reed bamboo is pulverized to form 80-100 mesh granular raw material, which is set aside.

[0038] Weigh 190 g of ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), put it into a round bottom flask, stir at 150 rpm and heat to 80°C. Weigh 10 g of the granular Arundos arundis raw material, gradually put it into the above-mentioned round-bottomed flask (the mass ratio of the granular Arundos arundis raw material to the ionic liquid is 1:19), heat up to 120° C. and then stir slowly for 3 hours. Subsequently, 2 g of solid acid Amberlyst35DRY was weighed and added to the above-mentioned round-bottomed flask, and the reaction was continued for 1.5 h to obtain a mixed slurry of Phyllostachys ionic liquid. After the reaction is finished, pour the mixed slurry of Arundo donax ionic liquid into three volumes of 50% acetone-water solution for regeneration, and centrifuge to obtain crude regenerated Arundo donax fiber raw material and ionic liquid lignin solution. ...

Embodiment 2

[0042] 20g of reed bamboo is pulverized to form 80-100 mesh granular raw material, which is set aside.

[0043] Weigh 190 g of ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), put it into a round bottom flask, stir at 150 rpm and heat to 80°C. Weigh 10 g of the granular Arundos arundis raw material, gradually put it into the above-mentioned round-bottomed flask (the mass ratio of the granular Arundos arundis raw material to the ionic liquid is 1:19), heat up to 120° C. and then stir slowly for 3 hours. Subsequently, 2 g of solid acid Amberlyst35DRY was weighed and added to the above-mentioned round-bottomed flask, and the reaction was continued for 0.5 h to obtain a mixed ionic liquid slurry of Phyllostachys arundis. After the reaction is finished, pour the mixed slurry of Arundo donax ionic liquid into three volumes of 50% acetone-water solution for regeneration, and centrifuge to obtain crude regenerated Arundo donax fiber raw material and ionic liquid lignin so...

Embodiment 3

[0047] 20g of reed bamboo is pulverized to form 80-100 mesh granular raw material, which is set aside.

[0048] Weigh 190 g of ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), put it into a round bottom flask, stir at 150 rpm and heat to 80°C. Weigh 10 g of the granular Arundos arundis raw material, gradually put it into the above-mentioned round-bottomed flask (the mass ratio of the granular Arundos reeds raw material to the ionic liquid is 1:19), heat up to 110° C. and then stir slowly for 3 hours. Subsequently, 2 g of the solid acid Amberlyst35DRY was weighed and added to the above-mentioned round bottom flask, and the reaction was continued for 1 h to obtain a mixed slurry of the ionic liquid of Phyllostachys arundis. After the reaction is finished, pour the mixed slurry of Arundo donax ionic liquid into three volumes of 50% acetone-water solution for regeneration, and centrifuge to obtain crude regenerated Arundo donax fiber raw material and ionic liquid lign...

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Abstract

The invention provides a method for improving lignocellulose raw material (especially bamboo reed fiber raw material) enzymolysis efficiency and lignose recovery rate. According to the method provided by the invention, through methods of ionic liquid dissolving, solid acid catalyzing and raw material regenerating by an acetone water solvent, compact cell wall structures of bamboo reeds are broken, and regenerative raw materials with rough fiber surface and II crystal form cellulose are obtained, so that the problem that liquid acid catalytic-ion liquid is difficult to recycle is solved, and the bamboo reeds can be utilized for high value; lignose powder is recycled with higher yield through heating, decompressing and distilling, so that the problem that ionic liquid lignose is difficult to recycle is solved, and the time for lignose recycle is shortened; a pre-processing and seperation method is simple and convenient to operate; the used reagents can be recycled and reused so as to be green and environmentally friendly; the recycle of acetone is favorable to environment protection and health of operators; the economic feasibility of ionic liquid pre-processing is improved.

Description

technical field [0001] The invention belongs to the technical field of pretreatment and separation of lignocellulosic raw materials, and in particular relates to a method for improving enzymatic hydrolysis efficiency and lignin recovery rate of reed bamboo fiber raw materials. Background technique [0002] With the increasing shortage of fossil energy and the emergence of devastating disasters caused by the greenhouse effect, the use of sustainable, renewable sugar crops or lignocellulosic raw materials or algae biomass to produce biofuel ethanol to replace fossil fuels has become more and more popular. people's attention. Fuel ethanol can be obtained from a variety of lignocellulosic raw materials such as corn stalks, energy plants, bagasse and other agricultural and forestry wastes, or crops such as corn and sugarcane, or algae fermentation, which plays an important role in alleviating the shortage of petroleum resources and improving ecological and environmental quality. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00C08H7/00
CPCC07G1/00D21C5/00
Inventor 许凤游婷婷张逊张学铭
Owner 山东银鹰化纤有限公司
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