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A kind of polymer polysaccharide degradation aid and its preparation method and application

A technology of macromolecules and polysaccharides, applied in the field of macromolecular polysaccharide degradation aids and its preparation, can solve the problems of difficult degradation of biomass, low degradation efficiency, and high degradation cost, and achieves reduction of ineffective adsorption, low cost of raw materials, and simple preparation process. Effect

Inactive Publication Date: 2020-04-14
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the dense and complex structure and crystallization characteristics of biomass polysaccharides, it is difficult to degrade biomass or the degradation efficiency is low, and the degradation cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The present invention provides a kind of preparation method of macromolecular polysaccharide degradation aid, comprising the following steps:

[0052] 1) After pulverizing the bagasse with a water content of 10-15%, pass it through a 20-mesh sieve; add the bagasse powder after sieving according to 10% w / v of the sum of the volumes of the green liquor and ethanol aqueous solution to a volume fraction of 50% Add 2 mL of green liquid per gram of bagasse, add green liquid, and react for 3 hours at a temperature of 165°C;

[0053] 2) Filtrate after the reaction, and the filtrate is distilled and concentrated to recover ethanol, and the solid filter residue can be used as a subsequent polymer polysaccharide; the filtrate after recovering ethanol is centrifugally filtered through 50KDa and 3KDa filter membranes respectively to obtain soluble lignin with a molecular weight of 3 to 50KDa, Freeze drying to obtain solid soluble lignin;

[0054] 3) The aqueous solution of the desc...

Embodiment 2

[0056] The present invention provides a kind of preparation method of macromolecular polysaccharide degradation aid, comprising the following steps:

[0057] 1) After pulverizing the bagasse with a water content of 10-15%, pass it through a 20-mesh sieve; add the bagasse powder after sieving according to 10% w / v of the sum of the volumes of the green liquor and ethanol aqueous solution to a volume fraction of 50% Add 2 mL of green liquid per gram of bagasse, add green liquid, and react for 3 hours at a temperature of 165°C;

[0058] 2) Filtrate after the reaction, and the filtrate is distilled and concentrated to recover ethanol, and the solid filter residue can be used as a subsequent polymer polysaccharide; the filtrate after recovering ethanol is centrifugally filtered through 50KDa and 3KDa filter membranes respectively to obtain soluble lignin with a molecular weight of 3 to 50KDa, Freeze drying to obtain solid soluble lignin;

[0059] 3) The aqueous solution of the desc...

Embodiment 3

[0061] This embodiment provides a preparation method of a polymer polysaccharide degradation aid, the difference from Example 1 is that step 1) is different;

[0062] Step 1) After pulverizing the bagasse with a water content of 10-15%, passing through a 20-mesh sieve; adding the sieved bagasse powder according to 10% w / v of the sum of the volumes of green liquor and ethanol aqueous solution to a volume fraction of 50 % ethanol aqueous solution; then add 1.5mL of green liquid per gram of bagasse, add green liquid, and react for 3 hours at a temperature of 170°C;

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Abstract

The invention relates to a high-molecular polysaccharide degradation additive, a preparation method thereof and an application of the additive. The preparation method includes the steps: 1) crushing dried bagasse, adding the crushed bagasse into ethyl alcohol water solution, adding green liquor to perform reaction, filtering mixture after reaction, taking soluble lignin with molecular weight of 3-50KDa, and drying the taken soluble lignin to obtain solid soluble lignin; 2) adding the solid soluble lignin, polyethylene glycol octylphenol ether and sapindoside into the ethyl alcohol water solution to perform reaction to obtain the high-molecular polysaccharide degradation additive. According to the method, the accessibility and the degradation efficiency of high-molecular polysaccharide of the bagasse can be improved, high-yield soluble lignin can be recycled, and the high-molecular polysaccharide degradation additive is further prepared, so that the high-molecular polysaccharide is degraded into oligosaccharide and monosaccharide.

Description

technical field [0001] The invention belongs to the field of biomass chemistry and chemical industry, and in particular relates to a polymer polysaccharide degradation aid and its preparation method and application. Background technique [0002] Biomass is the most extensive substance existing on the earth, referring to all animals, plants and microorganisms, as well as all substances excreted and metabolized by these living organisms. The usual concept of biomass mainly includes firewood forests, economic forests, timber forests, crop straws, forestry processing residues, and various organic wastes. 140 billion tons (dry weight), the potential is huge. Biomass polysaccharides such as biomass cellulose, hemicellulose, tamarind polysaccharides and galactomannans are polymer polysaccharides, which have the characteristics of natural regeneration, environmental friendliness and functional activity. Degradation of them into oligosaccharides and Monosaccharides can meet the urg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H7/00C08G81/00C12P19/02C12P19/04C12P19/12C12P19/14
CPCC08G81/00C08H6/00C12P19/02C12P19/04C12P19/12C12P19/14
Inventor 蒋建新张威伟薛雯雯张卫明
Owner BEIJING FORESTRY UNIVERSITY
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