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Method for synchronously preparing high-purity cellulose and lignin nano-particles from wood fibers and application of high-purity cellulose and lignin nano-particles

A technology of wood fiber and nano particles, which is applied in fiber raw material processing, textile and paper making, pulping with acid salt/acid anhydride, etc. , low boiling point, low cost effect

Active Publication Date: 2019-11-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method not only consumes a lot of water but also pollutes the environment, which restricts the industrialization of nano-lignin

Method used

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  • Method for synchronously preparing high-purity cellulose and lignin nano-particles from wood fibers and application of high-purity cellulose and lignin nano-particles
  • Method for synchronously preparing high-purity cellulose and lignin nano-particles from wood fibers and application of high-purity cellulose and lignin nano-particles
  • Method for synchronously preparing high-purity cellulose and lignin nano-particles from wood fibers and application of high-purity cellulose and lignin nano-particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) after furfural slag (purchasing the waste residue after producing furfural from Puyang furfural enterprise in Henan Province, which contains 29.56% cellulose and 62.97% lignin) is cleaned with ultrapure water and crosses 60 mesh sieves, in 60 °C to constant weight.

[0047] (2) The furfural slag treated in step (1) is added to the mixed solution containing formic acid-hydrogen peroxide according to the solid-to-liquid ratio (g / mL) of 1:10 (that is, the formic acid solution and the mass fraction of 95% 35% to 37% hydrogen peroxide solution mixed at a volume ratio of 8:2) in a three-necked flask, reacted at 80°C for 3h. After the reaction was completed, the mixed solution of formic acid and hydrogen peroxide was separated by filtration, and the organic acid-peroxide mixed solution with the same volume and ratio as the first addition was added again, and reacted at 90° C. for 3 hours. After the reaction is completed, the solid and the liquid are separated by filtratio...

Embodiment 2

[0051] (1) after furfural slag (purchasing the waste residue after producing furfural from Puyang furfural enterprise in Henan Province, which contains 29.56% cellulose and 62.97% lignin) is cleaned with ultrapure water and crosses 60 mesh sieves, in 60 °C to constant weight.

[0052] (2) Add the furfural slag treated in step (1) to the mixed solution containing acetic acid-hydrogen peroxide (that is, the acetic acid solution with a mass fraction of 36% to 38%) according to the solid-to-liquid ratio (g / mL) of 1:10. and a hydrogen peroxide solution with a mass fraction of 35% to 37% in a volume ratio of 7:3) in a three-necked flask for reaction at 60° C. for 4 h. After the reaction was completed, the mixed solution of organic acid and peroxide was separated by filtration, and the same volume and ratio of organic acid-peroxide mixed solution as the first addition was added again, and the reaction was carried out at 80° C. for 4 hours. After the reaction is completed, the solid ...

Embodiment 3

[0056] (1) After crushing the corn cob through a 60-mesh sieve, wash it with ultrapure water, and dry it at 60°C until it reaches a constant weight.

[0057] (2) Add the corn cob treated in step (1) to the mixed solution containing formic acid-hydrogen peroxide (that is, the formic acid solution with a mass fraction of 95% and the mass fraction 35% to 37% hydrogen peroxide solution mixed in a volume ratio of 8:2) in a three-necked flask, reacted at 60°C for 4h. After the reaction was completed, the mixed solution of organic acid and peroxide was separated by filtration, and the same volume and proportion of organic acid-peroxide mixed solution as the first addition was added again, and the reaction was carried out at 90° C. for 2 h. After the reaction is completed, the solid and liquid are separated by filtration, the solid is high-purity cellulose, and the liquid is a mixed solution containing lignin nanoparticles.

[0058] (3) Add the organic acid-peroxide mixed solution ob...

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Abstract

The invention discloses a method for synchronously preparing high-purity cellulose and lignin nanoparticles from wood fibers and application of the method. The method comprises the following steps: (1) adding wood fiber biomass into an organic acid-peroxide mixed solution, performing a reaction at 50-90 DEG C for 1-4 hours, filtering the liquid, and collecting a solid; then adding an organic acid-peroxide mixed solution with the same volume again, performing a reaction for 1-4 hours at the temperature of 50-100 DEG C, and after the reaction is finished, filtering and separating the reaction product to obtain solid residues and liquid, wherein the solid residues are high-purity cellulose; (2) adding ultrapure water into the liquid obtained in the step (1), standing the mixture, and centrifuging the mixture to obtain lignin nanoparticles, wherein the volume ratio of the liquid to the ultrapure water is 1:1-10. The method disclosed by the invention realizes synchronous preparation of high-purity cellulose and nano lignin particles, and the obtained lignin nano particles have a nano effect, uniform particle size distribution and good dispersity.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of biomass, in particular to a method for synchronously preparing high-purity cellulose and lignin nanoparticles from wood fibers and an application thereof. Background technique [0002] Lignocellulosic biomass is the most abundant renewable resource on earth. It exists in nature in various forms and consists of three main components: hemicellulose, cellulose and lignin. Among them, hemicellulose is mostly used to produce chemical products such as xylose, xylan, functional polysaccharides and furfural. Cellulose is mainly used in traditional industries such as textiles, papermaking, and plastics. Lignin is mainly used as a by-product of the pulp and paper industry or the biofuel ethanol industry, and is often discarded as waste or used as a low-value-added product in construction fields such as dispersants and water reducers. [0003] Lignocellulosic biomass is a whole composed of cellu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/04D21C5/00
CPCD21C3/04D21C5/00
Inventor 任俊莉王孝辉王小慧李蕊
Owner SOUTH CHINA UNIV OF TECH
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