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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 low destruction rate, protection activity, and less equipment investment

Active Publication Date: 2014-03-12
JINAN SHENGQUAN GROUP SHARE HLDG
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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 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

[0072] (1) N-level acid hydrolysis

[0073] 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. Set the first reactor as the first stage, and the last one as the third stage, add the newly prepared acid solution into the first stage hydrolysis reaction kettle, and add the acid solution discharged from the first stage acid hydrolysis reaction kettle into the second stage In the acid hydrolysis reactor, the acid solution discharged from the second-stage acid hydrolysis reactor is added into the third-stage acid hydrolysis reactor, and the solution discharged from the third-stage acid hydrolysis reactor is the final pentose solution, and then the first-stage acid The acid hydrolysis residue in the hydrolysis reactor is discharged and put into new corncob raw material, which is used a...

Embodiment 2

[0101] (1) N-level acid hydrolysis

[0102] The raw material and method are the same as Example 1 step (1), the difference is that the temperature of the first-stage acid hydrolysis is 135°C, the temperature of the second-stage acid hydrolysis is 120°C, and the temperature of the third-stage acid hydrolysis is 105°C; The weight of acid hydrolysis residue obtained is 1.79×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 8.69%, the absolute dry content of cellulose is 51.9%, and the absolute dry content of lignin is 34.4%), and the final pentose sugar solution is 8.21 × 10 3 kg, and the concentration of pentose sugar is 3.49%, the extraction rate of hemicellulose is 84%.

[0103] (2) Extraction of alkali lignin with alkaline solution

[0104] Mix the acid hydrolysis residue obtained in step (1) of this example with sodium hydroxide solution, wherein the liquid-solid volume ratio is 5:1, and the concentration of sodium hydroxide is 6%, then ...

Embodiment 3

[0114] (1) N-level acid hydrolysis

[0115] Raw material and method are with embodiment 1 step (1), and difference is that the concentration of phosphoric acid solution in every grade of reactor is 15%, and the time of every grade of acid hydrolysis is 2 hours, and the temperature of the first grade of acid hydrolysis is 100 ℃, The temperature of the second-stage acid hydrolysis is 95°C, and the temperature of the third-stage acid hydrolysis is 90°C; the weight of the finally obtained acid hydrolysis residue is 1.83×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 10.65%, the absolute dry content of cellulose is 50.56%, and the absolute dry content of lignin is 33.89%), and the final pentose sugar solution is 8.17 × 10 3 kg, and the concentration of pentose sugar is 3.34%, the extraction rate of hemicellulose is 80%.

[0116] (2) Extraction of alkali lignin with alkaline solution

[0117] All the acid hydrolysis residues obtained in step ...

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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 acid hydrolysis on the lignocellulose biomass, wherein reaction kettles of the N-stage acid hydrolysis are connected end to end, one of the reaction kettle is designed as a first stage and a final reaction kettle is designed as an N stage, a freshly prepared acid solution is added in the first stage reaction kettle, a final pentose solution obtained by hydrolysis is discharged from the N stage reaction kettle, final acid hydrolysis residues obtained by acid hydrolysis are discharged from the first stage reaction kettle, and new materials are loaded on the first stage reaction kettle, the first stage hydrolysis reaction temperature is 100-150 DEG C, the subsequent hydrolysis reaction temperature is reduced by 5-25 DEG C stage by stage, and N is an integer larger than or equal to 2; (b) treating the acid hydrolysis residues by using an alkali solution, so that alkali lignin is extracted; and (c) performing enzymatic hydrolysis on the alkali hydrolysis residues obtained by alkali hydrolysis treatment in the step (b) by using cellulase, so that a solution with glucose as a main component is obtained. 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): C12P19/14C12P19/02C08H7/00C13K13/00C12R1/80
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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