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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 of not being able to obtain high activity, high hemicellulose and cellulose extraction rate at the same time problems, to achieve the effect of improving purity, protecting activity, and less equipment investment

Active Publication Date: 2014-04-30
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

Experimental program
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Effect test

Embodiment 1

[0070] (1) N-level acid hydrolysis

[0071] 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

[0099] (1) N-level acid hydrolysis

[0100] Technology and method are the same as embodiment 1 step (1), difference is: the temperature of every grade of acid hydrolysis is 120 ℃, 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 It is 12%, and the concentration of phosphoric acid solution in the third stage acid hydrolysis is 4%; The weight that finally obtains acid hydrolysis residue is 1.82×10 3 Kg (about 65% of water content, the absolute dry content of hemicellulose is 5.88%, the absolute dry content of cellulose is 53.63%, and the absolute dry content of lignin is 35.08%), the quality of pentose solution is 8.29 * 10 3 kg, and the concentration of pentose sugar is 3.62%, the extraction rate of hemicellulose is 90%.

[0101] (2) Extraction of alkali lignin with alkaline solution

[0102] Mix all the acid hydrolysis residues obtained in step (1) of thi...

Embodiment 3

[0113] (1) N-level acid hydrolysis

[0114] 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 7%, the concentration of the third stage acid hydrolysis phosphoric acid is 4% %, the time for each stage of acid hydrolysis is 2 hours, and the temperature is 140°C; the weight of the final acid hydrolysis residue is about 1.79×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 8.72%, the absolute dry content of cellulose is 52.70%, and the absolute dry content of lignin is 33.56%), the final pentose sugar solution is 8.21 × 10 3 kg, and the concentration of pentose sugar is about 3.49%, the extraction rate of hemicellulose is 84%.

[0115] (2) Extraction of alkali lignin with alkaline solution

[0116] All the acid hydrolysis residues obtained in step (1) of this embod...

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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 reaction vessels for the N-stage acid hydrolysis are connected end to end, one of the reaction vessels is set to be the first stage, the last one is set to be the Nth stage, a newly-prepared acid solution is added into the first stage reaction vessel, a final pentose solution obtained by hydrolysis is discharged from the Nth stage reaction vessel, final hydrolysis residues obtained by hydrolysis are discharged from the first stage reaction vessel, new materials are filled into the first stage reaction vessel, 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 solution with a main component of glucose. 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 restricts the industrial application of grain fermentation to produce ethanol. At the same time, there are disadvantages such as competition with people for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/14C12P19/02C08H7/00C13K13/00C12R1/80
Inventor 唐一林江成真高绍丰张恩选马军强栗昭争赵兴国郭雨霖
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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