A kind of pretreatment method and system of lignocellulose prepared based on xylooligosaccharide

A lignocellulose and pretreatment technology, which is applied in the preparation of oligosaccharides and sugar derivatives, chemical instruments and methods, etc., can solve the problems of environmental protection cost, production cost impact, influence on the quality of xylo-oligosaccharides, etc., and achieves reaction energy consumption. The effect of reducing and improving mass transfer, heat transfer and catalytic efficiency

Active Publication Date: 2022-05-10
滁州润微生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the residual amount of dilute sulfuric acid will also affect the quality of xylooligosaccharides
In addition, the subsequent treatment of dilute sulfuric acid residue is also a major problem in its production process, and its environmental protection cost will also have an impact on the production cost of the entire product

Method used

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  • A kind of pretreatment method and system of lignocellulose prepared based on xylooligosaccharide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put the corn cob into the storage tank 6 after being air-dried and crushed, open the valve 1, inject 1.3% aqueous solution of maleic acid and ethylene glycol compound catalyst from the storage tank 5 into the storage tank 6, and make a mixed slurry Material, the solid-liquid ratio is 1:15; close valve 1, open valve 2, start the feed pump 7 to make the mixed slurry enter the reactor 8, the feed flow rate is set to 600L / h, and react at 180 ° C; Open valve 3, rush into nitrogen from nitrogen tank 11 to maintain pressure at 2.5Mpa, and control by pressure control system 15; After mixed slurry flows out from reactor 8, then enters secondary reaction buffer tank 9, while reacting Open the valve 4 to inject the outflowing reaction liquid into the reaction liquid collection tank 10 . During the entire reaction process, the temperature controller a 12 and the temperature controller b 13 are responsible for controlling the temperature of the reactor 8 and the secondary reaction b...

Embodiment 2

[0030] Put corn stalks into storage tank 6 after being air-dried and pulverized, open valve 1, inject 4.5% aqueous solution of citric acid and ethanol composite catalyst from liquid storage tank 5 into storage tank 6, make mixed slurry, solid The liquid ratio is 1:10; close valve 1, open valve 2, start the feed pump 7 to make the mixed slurry enter the reactor 8, set the feed flow rate to 500L / h, and react at 135°C; open valve 3 at the same time , flush nitrogen from the nitrogen tank 11 to maintain the pressure at 3.3Mpa, and control it through the pressure control system 15; after the mixed slurry flows out of the reactor 8, it enters the secondary reaction buffer tank 9, and the valve 4 is opened while reacting , so that the flowing out reaction solution is injected into the reaction solution collection tank 10 . During the entire reaction process, the temperature controller a 12 and the temperature controller b 13 are responsible for controlling the temperature of the reac...

Embodiment 3

[0032] Put the wheat straw into the storage tank 6 after being air-dried and pulverized, open the valve 1, inject 6.6% aqueous solution of oxalic acid and propylene glycol compound green catalyst from the storage tank 5 into the storage tank 6, and make a mixed slurry, solid The liquid ratio is 1:7.5; close the valve 1, open the valve 2, start the feed pump 7 to make the mixed slurry enter the reactor 8, the feed flow rate is set to 3000L / h, at 300 o React under C; open valve 3 simultaneously, rush into nitrogen from nitrogen tank 11 to maintain pressure at 4.5Mpa, and control by pressure control system 15; After mixed slurry flows out from reactor 8, then enters secondary reaction buffer The tank 9 opens the valve 4 during the reaction, so that the outflowing reaction solution is injected into the reaction solution collection tank 10 . During the entire reaction process, the temperature controller a 12 and the temperature controller b 13 are responsible for controlling the te...

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Abstract

The invention discloses a pretreatment method and system of lignocellulose prepared based on xylooligosaccharide. Mix lignocellulose and catalyst solution to obtain slurry, place the slurry in a reactor for continuous reaction, the continuous reaction is to continuously add the slurry into the reactor, and at the same time, continuously transfer the reaction solution from the reaction out. The method of the present invention can both improve the degradation rate (>90%) of xylan in hemicellulose, reduce its degree of polymerization or partially directly convert it into xylooligosaccharides, and will not produce too much xylose monosaccharide and Harmful by-products such as furfural and hydroxymethylfurfural.

Description

technical field [0001] The invention relates to a pretreatment method and system for lignocellulose prepared based on xylooligosaccharides, and belongs to the technical field of biochemical equipment. Background technique [0002] Lignocellulose pretreatment refers to the use of biochemical or physical methods to separate the three components of cellulose, hemicellulose and lignin. At the same time, chemical bonds such as hydrogen bonds and covalent bonds of internal links are broken, making its structure loose and partially degraded. For the pretreatment of xylooligosaccharides, the purpose is to break the hydrogen bond and van der Waals force between hemicellulose and cellulose fine fibers, and the covalent bond formed by methylation and ethyl esterification units with lignin , and the β-1,4-glucosidic bonds formed between the xylose structural units, so that all or part of the xylan in hemicellulose is degraded and its degree of polymerization is reduced. [0003] The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H3/06C07H1/00C08B37/00
CPCC07H3/06C07H1/00C08B37/0057
Inventor 张建英
Owner 滁州润微生物科技有限公司
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