Comprehensive utilization method of lignocellulose biomass

A lignocellulose and biomass technology, applied in hemicellulose and lignin, comprehensive utilization of cellulose in lignocellulosic biomass, can solve the problems of low enzymatic conversion rate of cellulose and low utilization rate of lignin, etc. Achieve the effect of improving the extraction rate, avoiding a large amount of damage to lignin and cellulose, and simple equipment maintenance

Active Publication Date: 2013-04-17
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the problems of low utilization rate of lignin and low conversion rate of cellulose enzymolysis when comprehensively utilizing hemicellulose, lignin and cellulose in the prior art, thus proposing A method for the comprehensive utilization of lignocellulosic biomass

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  • Comprehensive utilization method of lignocellulose biomass

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Experimental program
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Effect test

Embodiment 1

[0049] (1) acid hydrolysis

[0050] 10.6kg corn cobs (mass composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%, the same below) are broken, washed with water to remove dust, and then processed with 80kg phosphoric acid solution Hydrolysis, the mass concentration of phosphoric acid solution is 10%, the temperature of acid hydrolysis is 120 ℃, the time is 1 hour, the acid hydrolysis residue and pentose sugar solution obtained after hydrolysis are separated, wash the acid hydrolysis residue with 10kg water, cleaning solution Merge with described pentose solution, finally obtain 19.64kg acid hydrolysis residue (moisture content is about 65%, the absolute dry content of hemicellulose is 15.87%, the absolute dry content of lignin is 31.75%, the absolute dry content of cellulose 47.81%) and 80.34kg pentose solution, the concentration of pentose solution is 2.89%. Then the extraction rate of hemicellulose is 68%.

[0051] The calculation for...

Embodiment 2

[0067] (1) acid hydrolysis

[0068] Break 10.6kg of corncobs, wash with water to remove dust, and then hydrolyze with 80kg of phosphoric acid solution, the mass concentration of phosphoric acid solution is 20%, the temperature of acid hydrolysis is 100°C, and the time is 0.5 hours. After the hydrolysis is completed, the separated acid hydrolysis Residue and pentose solution, clean described acid hydrolysis residue with 10kg water, and cleaning solution merges with described pentose solution, finally obtains 19.35kg acid hydrolysis residue (moisture content is about 65%, and the dry content of hemicellulose is 15.10 %, the absolute dry content of lignin is 31.79%, the absolute dry content of cellulose is 48.47%) and 80.63kg pentose sugar solution, and the concentration of pentose sugar solution is 2.96%. Then the extraction rate of hemicellulose is 70%.

[0069] (2) Extraction of alkali lignin with alkaline solution

[0070] Mix all acid hydrolysis residues obtained in step (...

Embodiment 3

[0078] (1) acid hydrolysis

[0079] Break 10.6kg of corn cobs, wash with water to remove dust, and then hydrolyze with 80kg of phosphoric acid solution, the mass concentration of phosphoric acid solution is 5%, the temperature of acid hydrolysis is 150°C, and the time is 1 hour. After the hydrolysis is completed, the separated acid hydrolysis Residue and pentose solution, wash described acid hydrolysis residue with 10kg water, and cleaning liquid merges with described pentose solution, finally obtain 20.02kg acid hydrolysis residue (water content is about 65%, and the dry content of hemicellulose is 16.05% %, the dry content of lignin is 31.5%, the dry content of cellulose is 47.97%) and 79.96kg pentose solution, and the concentration of pentose solution is 2.86%. Then the extraction rate of hemicellulose is 67%.

[0080] (2) Extraction of alkali lignin with alkaline solution

[0081] Mix all acid hydrolysis residues obtained in step (1) of this example with sodium hydroxide...

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Abstract

The invention relates to a comprehensive utilization method of lignocellulose biomass. The method comprises the following steps of (a) performing acid hydrolysis on the lignocellulose biomass to obtain a pentose solution and acid hydrolysis residues after separation; (b) treating the acid hydrolysis residues with an alkali solution so as to extract alkali lignin; (c) performing enzymatic hydrolysis on the alkali hydrolysis residues obtained by alkali solution treatment in the step (b) by using cellulose so as to obtain a glucose solution and enzymatic hydrolysis residues, wherein the cellulose is obtained by culturing a strain of penicillium, the penicillium is named as penicillium recumbent PD-G3-08; and (d) returning the enzymatic hydrolysis residues obtained by alkali solution treatment to the step (b) so as to perform alkali solution treatment, or firstly the enzymatic hydrolysis residues with fresh acid hydrolysis residues and then carrying out the alkali solution treatment of the step (b), performing the step (c) and the step (d) successively, repeating such process, and further extracting the lignin and performing cellulose enzymatic hydrolysis. The above method increases conversion rate of cellulose enzymatic hydrolysis and realizes comprehensive utilization of the lignocellulose biomass resources.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing lignocellulosic biomass, in particular to a method for comprehensively utilizing cellulose, hemicellulose and lignin in lignocellulosic biomass. Background technique [0002] With the depletion of fossil fuel resources and the increasing environmental pollution, the use of renewable energy as a substitute for petrochemical products has become increasingly important. Fuel ethanol is the main form of biomass liquid energy and the most likely substitute for fossil fuels. At present, the world's ethanol production mainly uses starches (corn, cassava, etc.) and sugars (sugar cane, sugar beets, etc.) as raw materials for fermentation. The technology of producing ethanol by microbial fermentation is mature, but the high cost of raw materials limits the industrial application of grain fermentation to produce ethanol. At the same time, there are disadvantages such as competition with people for gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C08H7/00C13K13/00
Inventor 唐一林高绍丰张恩选韩文斌崔建丽栗昭争马军强刘洁江成真
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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