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Comprehensive utilization process of wood cellulose

A technology of lignocellulose and lignin, which is applied in the field of comprehensive utilization of plant lignocellulose, can solve the problems of non-comprehensive utilization, low utilization rate of biomass raw materials, and large pollution, so as to reduce pollution, increase yield, and reduce The effect of emissions

Active Publication Date: 2011-05-18
SHANDONG LONGLIVE BIO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, in our country, there are defects such as low utilization rate, non-comprehensive utilization, and large pollution in the treatment of biomass raw materials. There is an urgent need for a process that can realize the comprehensive utilization of resources with high added value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: comprehensive utilization of plant lignocellulose to produce xylooligosaccharides, lignin and cellulosic ethanol, the steps are as follows:

[0049] (1) Preparation of xylooligosaccharides

[0050] (1) Steam explosion: crush the biomass raw material (corn cob) to 20 mesh; the blasting conditions are: blasting pressure 2.0Mpa, blasting time 60s;

[0051] (2) Slurry mixing: batching according to the solid-liquid ratio of 1:6, adjust the pH to 3.5, stir evenly, and prepare for enzymolysis;

[0052] (3) Enzymolysis: Add 20 IU / g of xylanase to the material that has been prepared for pulping, and carry out enzymolysis to obtain crude sugar liquid. The enzymolysis temperature is 50° C., and the enzymolysis time is 8 hours; the xylo-oligosaccharide content is 82%;

[0053] (4) Slag-liquid separation: Slag-liquid separation is carried out after enzymolysis to obtain sugar liquid and sugar residue. The sugar liquid is used to prepare xylooligosaccharides, and the s...

Embodiment 2

[0077] Embodiment 2: comprehensive utilization of plant lignocellulose to produce xylooligosaccharides, lignin and cellulosic ethanol, the steps are as follows:

[0078] (1) Preparation of xylooligosaccharides

[0079] (1) Steam explosion: crush the biomass raw material (straw) to 20 mesh; the blasting conditions are: the blasting pressure is 2.5Mpa, and the blasting time is 90s;

[0080] (2) Slurry mixing: batching according to the solid-liquid ratio of 1:7, adjust the pH to 3.8, stir evenly, and prepare for enzymolysis;

[0081] (3) Enzymolysis: Add 20IU / g xylanase to the material that has been prepared for pulping, and carry out enzymolysis to obtain crude sugar liquid; enzymolysis temperature is 50°C; enzymolysis time is 12 hours; after enzymolysis, the xylooligosaccharide content 87%;

[0082] (4) Slag-liquid separation: Slag-liquid separation is carried out after enzymolysis to obtain sugar liquid and sugar residue. The sugar liquid is used to prepare xylooligosacchari...

Embodiment 3

[0106] Embodiment 3: comprehensive utilization of plant lignocellulose to produce xylooligosaccharides, lignin and cellulosic ethanol, the steps are as follows:

[0107] (1) Preparation of xylooligosaccharides:

[0108] (1) Steam explosion: crush the biomass raw material (straw) to 20 mesh, and carry out steam explosion, the blasting conditions are: blasting pressure 2.0Mpa, blasting time is 60s;

[0109] (2) Slurry mixing: batching according to the solid-liquid ratio of 1:6, adjust the pH to 3.5, stir evenly, and prepare for enzymolysis;

[0110] (3) Enzymolysis: Add 11IU / g xylanase to the material that has been prepared for pulping, and carry out enzymolysis to obtain crude sugar liquid; enzymolysis temperature is 50°C; enzymolysis time is 8 hours; after enzymolysis, the xylooligosaccharide content 89%;

[0111] (4) Slag-liquid separation: Slag-liquid separation is carried out after enzymolysis to obtain sugar liquid and sugar residue. The sugar liquid is used to prepare x...

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Abstract

The invention discloses a comprehensive utilization process of wood cellulose, which comprises the processes of comprehensive treatment, oligosaccharide preparation, lignin preparation, fiber ethanol preparation and the like. The invention has the advantages of decomposing a biomass macromolecular natural compact structure by using a high-pressure instant steam exploding technology, being beneficial to the separation and the extraction of the lignin, the cellulose and the cellulose, reducing the consumption of the energy sources and the materials, such as acid, alkali, heat, catalyst and the like for preprocessing, reducing the emission of pollutants and lightening the pollution of the environment. Secondly, the cogeneration of oligosaccharide and lignin realizes the comprehensive utilization of the energy sources, especially the application of the steam exploding technology ensures that the quality of the two products of the oligosaccharide and the lignin is greatly improved and the yield is greatly increased; and alcohol and the lignin of production fuels of sugar residues can be extracted irrespective of the order.

Description

technical field [0001] The invention relates to a comprehensive utilization process of plant lignocellulose, in particular to using corncobs, straw, rice straw and other plant lignocellulose as raw materials, using high-pressure instantaneous steam explosion technology for raw material pretreatment, and using compound enzyme technology to prepare high-quality functional Sugar (xylose, xylo-oligosaccharides), and the remaining waste residues are first produced into polymer materials (enzymatically decomposed lignin), and then further produced into cellulosic ethanol. The waste liquid is used to produce biogas for power generation and reused in production, and finally achieve high additional resources Comprehensive utilization process of value. Background technique [0002] At present, the energy problem has become the main problem faced by countries in the world in the development process, and has become one of the main factors restricting the development speed of the world e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P7/06C12P19/04
CPCY02E50/17Y02E50/10
Inventor 肖林高永保陈小刚覃树林张茜赵海涛
Owner SHANDONG LONGLIVE BIO TECH CO LTD
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