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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 problems of high hemicellulose and fiber extraction rate, high activity cannot be obtained at the same time, etc. , to achieve the effect of improving extraction rate, eliminating space barriers and reducing usage

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

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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 in the prior art, which cannot simultaneously obtain highly active lignin, higher hemicellulose and fiber extraction rate problems, thus proposing a method for the comprehensive utilization of lignocellulosic biomass

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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

[0059] (1) N-level acid hydrolysis

[0060] In the present embodiment: what adopt is tertiary acid hydrolysis, at first corn cob (mass component composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%) is smashed, Dust off by washing with water. The first reaction kettle is set as the first level, and the last one is set as the third level, and the newly prepared acid solution is added in the first-level hydrolysis reaction kettle to adjust the concentration of the acid solution discharged from the first-level acid hydrolysis reaction kettle, Then add it into the second-stage acid hydrolysis reactor, adjust the concentration of the acid solution discharged in the second-stage acid hydrolysis reactor, and then add it into the third-stage acid hydrolysis reactor, the third-stage acid hydrolysis reactor The discharged solution is the final pentose sugar solution, and then the acid hydrolysis residue in the first-stage acid hydrolysis reactor...

Embodiment 2

[0077] (1) N-level acid hydrolysis

[0078] Technology and method are with embodiment 1 step (1), and difference is: the time of every grade of acid hydrolysis reaction is 0.5 hour, the concentration of phosphoric acid solution in the first grade acid hydrolysis is 20%, the concentration of phosphoric acid solution in the second grade acid hydrolysis Concentration is 12%, and the concentration of phosphoric acid solution in the tertiary acid hydrolysis is 4%; The weight that finally obtains acid hydrolysis residue is 1.93 * 10 3 Kg (about 65% of water content, the absolute dry content of hemicellulose is 10.07%, the absolute dry content of cellulose is 51.11%, and the absolute dry content of lignin is 34.17%), the quality of pentose solution is 8.06 * 10 3 kg, and the concentration of pentose sugar is 3.38%, the extraction rate of hemicellulose is 80%.

[0079] (2) Extraction of alkali lignin with alkaline solution

[0080] All the acid hydrolysis residues obtained in step (...

Embodiment 3

[0088] (1) N-level acid hydrolysis

[0089] Process and method are the same as embodiment 1 step (1), the difference is that the concentration of the first stage acid hydrolysis phosphoric acid is 10%, the concentration of the second stage acid hydrolysis phosphoric acid is 8%, and the concentration of the third stage acid hydrolysis phosphoric acid is 6%. %, the time for each level of acid hydrolysis is 1.5 hours, and the temperature is 120°C; the weight of the acid hydrolysis residue finally obtained is 2.06×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 14.18%, the absolute dry content of cellulose is 48.84%, and the absolute dry content of lignin is 32.62%), and the final pentose sugar solution is 7.94 × 10 3 kg, and the concentration of pentose sugar is about 3.01%, the extraction rate of hemicellulose is 70%.

[0090] (2) Alkaline solution to extract lignin

[0091] Mix all acid hydrolysis residues obtained in step (1) of this exa...

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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 concentrations of the acid solutions decrease gradually from the first stage to the Nth stage by 10-40% of the concentration of the first stage acid solution,, 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): C12P19/14C08H7/00
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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