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Comprehensive utilization method of lignocellulose biomass

A lignocellulose and biomass technology, which is applied to hemicellulose and lignin, comprehensively utilizes cellulose in lignocellulosic biomass, and can solve the problem that the extraction rate of high activity, high purity cellulose and hemicellulose cannot be obtained at the same time. and other problems, to achieve the effects of long use time, improved extraction rate, and simple equipment maintenance.

Active Publication Date: 2015-01-14
JINAN SHENGQUAN GRP SHARE HLDG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to overcome the existing in the prior art when comprehensive utilization of cellulose, hemicellulose and lignin, can not simultaneously obtain high activity, high purity lignin and higher cellulose and lignin The problem of the extraction rate of hemicellulose, thus proposed a method for the comprehensive utilization of lignocellulosic biomass

Method used

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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

[0065] (1) acid hydrolysis

[0066] 10.6kg corn cobs (mass composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%, the same below) are broken, washed with water to remove dust, and then processed with 80kg phosphoric acid solution Hydrolysis, the mass concentration of phosphoric acid solution is 10%, the temperature of acid hydrolysis is 120 ℃, the time is 1 hour, the acid hydrolysis residue and pentose sugar solution obtained after hydrolysis are separated, wash the acid hydrolysis residue with 10kg water, cleaning solution Merge with described pentose solution, finally obtain 19.64kg acid hydrolysis residue (moisture content is about 65%, the absolute dry content of hemicellulose is 15.87%, the absolute dry content of lignin is 31.75%, the absolute dry content of cellulose 47.81%) and 80.34kg pentose solution, the concentration of pentose solution is 2.89%. Then the extraction rate of hemicellulose is 68%.

[0067] The calculation for...

Embodiment 2

[0083] (1) acid hydrolysis

[0084] Break 10.6kg of corncobs, wash with water to remove dust, and then hydrolyze with 80kg of phosphoric acid solution, the mass concentration of phosphoric acid solution is 20%, the temperature of acid hydrolysis is 100°C, and the time is 0.5 hours. After the hydrolysis is completed, the separated acid hydrolysis Residue and pentose solution, clean described acid hydrolysis residue with 10kg water, and cleaning solution merges with described pentose solution, finally obtains 19.35kg acid hydrolysis residue (moisture content is about 65%, and the dry content of hemicellulose is 15.10 %, the absolute dry content of lignin is 31.79%, the absolute dry content of cellulose is 48.47%) and 80.63kg pentose sugar solution, and the concentration of pentose sugar solution is 2.96%. Then the extraction rate of hemicellulose is 70%.

[0085] (2) Extraction of alkali lignin with alkaline solution

[0086]Mix the acid hydrolysis residue in step (1) of this ...

Embodiment 3

[0094] (1) acid hydrolysis

[0095] Break 10.6kg of corn cobs, wash with water to remove dust, and then hydrolyze with 80kg of phosphoric acid solution, the mass concentration of phosphoric acid solution is 5%, the temperature of acid hydrolysis is 150°C, and the time is 1 hour. After the hydrolysis is completed, the separated acid hydrolysis Residue and pentose solution, clean described acid hydrolysis residue with 10kg water, and cleaning solution merges with described pentose solution, finally obtains 20.02kg acid hydrolysis residue (water content is about 65%, and the dry content of hemicellulose is 16.05% %, the dry content of lignin is 31.5%, the dry content of cellulose is 47.97%) and 79.96kg pentose solution, and the concentration of pentose solution is 2.86%. Then the extraction rate of hemicellulose is 67%.

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

[0097] Mix the acid hydrolysis residue in step (1) of this example with sodium hydroxide solut...

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Abstract

A comprehensive utilization method of lignocellulose biomass comprises the following steps: (a) performing acid hydrolysis of the lignocellulose biomass, separating to obtain a pentose solution and acid hydrolysis residues; (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 improves the conversion rate of cellulose enzymatic hydrolysis, and realizes comprehensive 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): C12P19/14C08H7/00C13K13/00
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 GRP SHARE HLDG CO LTD
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