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 of not being able to obtain high activity, high hemicellulose and fiber extraction rate at the same time problem, achieve the effect of reducing inhibition, increasing extraction rate and reducing pollution

Active Publication Date: 2014-08-13
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Abstract
  • Description
  • Claims
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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 problem that high active lignin, higher hemicellulose and fiber extraction rate cannot be obtained simultaneously when comprehensively utilizing cellulose, hemicellulose and lignin in the prior art , thus proposing a comprehensive utilization method 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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) N-level acid hydrolysis

[0062] 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%, the same below) Crush, wash with water to remove dust. One of the reaction kettles 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, and then Add it into the second-stage acid hydrolysis reactor, adjust the concentration of the acid solution discharged from the second-stage acid hydrolysis reactor, then add it into the third-stage acid hydrolysis reactor, and the acid solution discharged from the third-stage acid hydrolysis reactor The solution is the final pentose sugar solution, and then the acid hydrolysis residue ...

Embodiment 2

[0081] (1) N-level acid hydrolysis

[0082] 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 (the water content is about 65%, 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 weight of pentose sugar solution is 8.06 × 10 3 kg, the concentration of pentose sugar is 3.38%, and the extraction rate of hemicellulose is 80%.

[0083] (2) Enzymatic hydrolysis of cellulose

[0084] The conditions of the enzymolysis are: cellulase is commerc...

Embodiment 3

[0092] (1) N-level acid hydrolysis

[0093] 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%), the weight of pentose sugar solution is 7.94 × 10 3 kg, the concentration of pentose sugar is 3.01%, and the extraction rate of hemicellulose is 70%.

[0094] (2) Enzymatic hydrolysis of cellulose

[0095] All acid hydrolysis residues obtained in step (1) of this example were su...

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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 N-stage hydrolysis on the lignocellulose biomass, wherein a reduced range of the concentration of an acid solution from a first-stage to an N-stage stage by stage is 10-40% that of the first-stage acid solution, and N is an integer larger than or equal to 2; (b) performing enzymatic hydrolysis on the acid hydrolysis residues in the step (a) by using cellulose, so that a glucose solution and enzymatic hydrolysis residues are obtained; (c) treating the enzymatic hydrolysis residues produced in the step (b) with an alkali solution, so that lignin in the enzymatic hydrolysis residues can be extracted and alkali hydrolysis residues are obtained; and (d) returning the alkali hydrolysis residues obtained by alkali hydrolysis treatment to the step (b) after the step (c) is finished so as to perform enzymatic hydrolysis, or firstly mixing the alkali hydrolysis residues with fresh acid hydrolysis residues and then carrying out the enzymatic hydrolysis 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 realizes maximized resource utilization of the 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 Patents(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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