Method for efficiently dissolving full components of plant fiber

A plant fiber, full-component technology, applied in the field of plant fiber treatment, can solve the problem of inability to efficiently dissolve cellulose and lignin, and achieve the effect of reducing use and cost

Active Publication Date: 2015-08-26
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent 201110059319.8 discloses a method for separating cellulose and lignin from plant fiber raw materials by using ionic liquids, but this method also uses the organic solvent DMSO, and its dissolution rate for plant fibers can only reach 36%.
Chinese patent 200910012002.1 discloses a method for separating lignin and cellulose from li

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for efficiently dissolving full components of plant fiber
  • Method for efficiently dissolving full components of plant fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 2.0g of eucalyptus powder into a 100mL clean and dry reaction vessel, add 50g of different types of ionic liquid aqueous solutions with a mass fraction of 90%, and stir magnetically in a microwave instrument with a power of 500W, the stirring speed is 200rpm, and the temperature is controlled. After reacting at 170°C for 20 minutes, cool down to room temperature and centrifuge to obtain plant fiber solution and undissolved solid matter. The solid matter is washed and dried to obtain a dissolved residue, and the dissolution rate is calculated.

[0026] Under the conditions of different kinds of ionic liquid aqueous solutions, the dissolution rates of plant fibers are shown in Table 1:

[0027] Table 1 Dissolution rate of plant fiber under the condition of different kinds of ionic liquid aqueous solution

[0028] Types of Ionic Liquids

[Mmim] DMP

[Amim] Cl

[Bmim] Cl

[Emim] Ac

Plant fiber dissolution rate (%)

92.9

58.4

47.6 ...

Embodiment 2

[0035] 2.0g of eucalyptus powder was added to a 100mL clean and dry reaction vessel, and 50g of [Mmim]DMP ionic liquid aqueous solution of different concentrations (mass fractions) were added, and magnetically stirred in a microwave instrument with a power of 500W, and the stirring speed was 200rpm. Control the temperature at 170°C, react for 20 minutes, cool down to room temperature, and centrifuge to obtain a plant fiber solution and undissolved solid matter. The solid matter is washed and dried to obtain a dissolved residue, and the dissolution rate is calculated.

[0036] Under the conditions of different concentrations of ionic liquid aqueous solution, the dissolution rate of plant fiber is shown in Table 2:

[0037] Table 2 Dissolution rate of plant fibers under different concentrations of ionic liquid aqueous solution

[0038] Ionic liquid concentration (%)

[0039] As can be seen from the results in Table 2, when the concentration of the ionic liquid aqueous ...

Embodiment 3

[0041] 2.0g of eucalyptus powder was added to 100mL of clean and dry reaction vessel, and 50g of [Mmim]DMP ionic liquid aqueous solution was added with a concentration (mass fraction) of 90%, and magnetically stirred in a microwave instrument with a power of 500W, and the stirring speed was 280rpm , control the temperature at 170°C, 150°C, 130°C, 110°C and 90°C respectively, react for 20 minutes, cool down to room temperature, and centrifuge to obtain plant fiber solution and undissolved solid matter. The solid matter is washed and dried to obtain Dissolve the residue and calculate the dissolution rate.

[0042] Under different dissolution reaction temperatures, the dissolution rates of plant fibers are shown in Table 3:

[0043] The dissolution rate of plant fiber under different dissolution reaction temperatures in table 3

[0044] Reaction temperature (°C)

[0045] It can be seen from the results in Table 3 that when the dissolution reaction temperature is higher...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of processing of plant fiber and discloses a method for efficiently dissolving full components of plant fiber. The method comprises steps as follows: a plant fiber material is added to a water solution of an ion liquid, uniformly stirred and mixed and subjected to a dissolution reaction in a microwave environment at the temperature of 150 DEG C-180 DEG C, the stirring speed ranges from 200 rpm to 280 rpm, and the reaction time ranges from 15 min to 30 min; residues obtained after dissolution are separated centrifugally, and a plant fiber solution is obtained. The proper ion liquid and a dissolution process condition are selected, cellulose and lignin in the plant fiber can be dissolved simultaneously, and the dissolution rate of the plant fiber can be up to 90% or even higher than 95%.

Description

technical field [0001] The invention belongs to the technical field of plant fiber treatment, and in particular relates to a method for efficiently dissolving all components of plant fiber. Background technique [0002] In nature, the reserve of lignin is second only to cellulose, and it is regenerated at a rate of 5 billion tons every year. The pulp and paper industry separates about 140 million tons of cellulose from plants every year, and at the same time obtains about 50 million tons of lignin by-products, but so far, more than 95% of lignin is still directly discharged into rivers or rivers as "black liquor". It is burned after being concentrated, and is rarely used effectively. The development and utilization of lignocellulose is of great significance to solve the resource and energy crisis faced by human beings. [0003] At present, the separation process of lignocellulose is mainly carried out under acidic or alkaline conditions, or using small molecular low-boilin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08J3/09C08H7/00
Inventor 许俊鑫侯轶李友明
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap