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Comprehensive utilization method of lignocellulose biomass

A lignocellulose and biomass technology, applied in the field of comprehensive utilization of cellulose, hemicellulose and lignin in lignocellulosic biomass, can solve the problem that high activity, high hemicellulose and cellulose extraction rate cannot be obtained at the same time, etc. problem, to achieve the effect of shortening the running time, maintaining the activity, and reducing the inhibitory effect

Active Publication Date: 2013-04-17
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is to overcome the comprehensive utilization of cellulose, hemicellulose and lignin existing in the prior art, which cannot simultaneously obtain highly active lignin, higher hemicellulose and cellulose extraction. Therefore, a comprehensive utilization method of lignocellulosic biomass is proposed

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  • Comprehensive utilization method of lignocellulose biomass
  • Comprehensive utilization method of lignocellulose biomass
  • Comprehensive utilization method of lignocellulose biomass

Examples

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Effect test

Embodiment 1

[0075] (1) N-level acid hydrolysis

[0076] In the present embodiment: what adopt is tertiary acid hydrolysis, at first corn cob (mass component composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.01%, lignin 23.7%, other 2.95%, the same below) Break it up, then add the newly prepared acid solution into the first-stage hydrolysis reactor, add the acid solution discharged from the first-stage acid hydrolysis reactor into the second-stage hydrolysis reactor, and then add the acid solution discharged from the second-stage hydrolysis reactor Add in the third-stage hydrolysis reactor, the acid solution discharged from the third-stage reactor is the final pentose solution, then take out the residue of acid hydrolysis in the first-stage hydrolysis reactor, then put in new corn cob raw materials, and then The original first-stage hydrolysis reactor is used as the third-stage reactor, the original second-stage reactor is used as the first-stage reactor, and the original thi...

Embodiment 2

[0094] (1) N-level acid hydrolysis

[0095] Raw material and method are with embodiment 1 step (1), and difference is: the time of first-order hydrolysis reaction is 3 hours, and the time of second-order hydrolysis reaction is 2 hours, and the time of third-order hydrolysis reaction is 1 hour, every The temperature of grade acid hydrolysis is 110 ℃; The weight of acid hydrolysis residue obtained is 1.95×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 11.48%, the absolute dry content of cellulose is 50.57%, and the absolute dry content of lignin is 33.36%), the pentose sugar solution is 8.05×10 3 kg, and the concentration of pentose sugar is 3.26%, the extraction rate of hemicellulose is 77%.

[0096] (2) Extraction of alkali lignin with alkaline solution

[0097] Mix the acid hydrolysis residue obtained in step (1) of this example with sodium hydroxide solution, wherein the liquid-solid volume ratio is 10:1, and the concentration of sodi...

Embodiment 3

[0104] (1) N-level acid hydrolysis

[0105] Raw material and method are with embodiment 1 step (1), and difference is that the time of first-order hydrolysis reaction is 1 hour, and the time of second-order hydrolysis reaction is 0.75 hour, and the time of third-order hydrolysis reaction is 0.5 hour, every The concentration of phosphoric acid hydrolyzed by grade acid is 10%; the weight of finally obtained acid hydrolysis residue is 2.02×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 13.51%, the absolute dry content of cellulose is 49.08%, and the absolute dry content of lignin is 32.9%), and the pentose sugar solution is 7.98×10 3 kg, and the concentration of pentose sugar is 3.08%, the extraction rate of hemicellulose is 72%.

[0106] (2) Alkali solution to extract alkali lignin

[0107] Get all the acid hydrolysis residues obtained in step (1) of the present embodiment, carry out alkali solution treatment according to the process meth...

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Abstract

A comprehensive utilization method of lignocellulose biomass comprises the following steps: (a) performing N-stage acid hydrolysis of lignocellulose biomass, wherein the time for the first stage hydrolysis reaction is 1-4 hours, the time of subsequent hydrolysis reactions decreases by 0.25-1.5 hours stage by stage, and N is an integer more than or equal to 2; (b) processing the acid hydrolysis residues by using an alkaline solution so as to extract alkaline lignin; (c) performing enzymatic hydrolysis of the alkaline hydrolysis residues obtained by alkaline solution processing in step (b) by using cellulase to obtain a glucose solution and enzymatic hydrolysis residues; (d) after step (c) is complete, returning the obtained enzymatic hydrolysis residues to step (b) for alkaline solution processing, or combining the enzymatic hydrolysis residues with new acid hydrolysis residues and performing alkaline solution processing in step (b), then orderly performing steps (c) and (d), cycling the steps so as to further extract lignin and to perform enzymatic hydrolysis of the celluose. The method realizes the maximum resource utilization of lignocellulose biomass.

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): C12P19/14C12P19/02C08H7/00C13K13/00C12R1/80
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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