Supercharge Your Innovation With Domain-Expert AI Agents!

Method for producing high-purity cellulose from cotton linter by utilizing steam explosion technology

A technology of cotton linters and cellulose, which is applied in the post-treatment of cellulose pulp, fiber raw material treatment, textiles and papermaking, etc. It can solve the problems of complicated process, insufficient purity, and low cellulose yield, and achieve guaranteed yield, The effect of ensuring integrity and purity

Active Publication Date: 2017-01-25
JINAN MIDUOTAN NEW ENERGY TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of cotton linters to prepare cellulose in the prior art not only has low yield, complex process and far insufficient purity

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method utilizing steam explosion technology to produce high-purity cellulose from cotton linters, comprising the steps of:

[0030] 1) Cotton linters are unpacked, unpacked, decontaminated, and dust-removed, then placed in a steam explosion separator, add water 10 times the mass of the cotton linters, and inject nitrogen gas to distribute the cotton linters evenly in the water, and pre-soak for 20 minutes .

[0031] 2) Add compound protease (500U / kg dry basis cotton linters), pause for 1 minute, blow nitrogen, and enzymatically hydrolyze for 50 minutes; then add normal temperature type α-amylase (400U / kg dry basis cotton linters) for enzymolysis 40 minutes; then pass through steam to raise the temperature to 65°C and keep it warm for 10 minutes to inactivate the activity of the enzyme.

[0032] Wherein, the composite protease is composed of alkaline protease with endopeptidase activity and proteinase K with telopeptidase activity, and the ratio of alkaline protease w...

Embodiment 2

[0044] A method utilizing steam explosion technology to produce high-purity cellulose from cotton linters, comprising the steps of:

[0045] 1) Cotton linters are unpacked, unpacked, decontaminated, and dust-removed, then placed in a steam explosion separator, add water 8 times the quality of the cotton linters, and pass in nitrogen gas to make the cotton linters evenly distributed in the water, presoaked for 30 minutes .

[0046]2) Add compound protease (600U / kg dry basis cotton linters), pause for 2 minutes, blow nitrogen, and enzymatically hydrolyze for 30 minutes; then add normal temperature type α-amylase (500U / kg dry basis cotton linters), enzymolyze 30 minutes; then pass through steam to raise the temperature to 70°C and keep it warm for 8 minutes to inactivate the activity of the enzyme.

[0047] Wherein, the composite protease is composed of alkaline protease with endopeptidase activity and proteinase K with telopeptidase activity, and the ratio of alkaline protease ...

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 discloses a method for producing high-purity cellulose from cotton linter by utilizing a steam explosion technology, and belongs to the technical field of biology. According to the method disclosed by the invention, protein and starch are successfully and efficiently removed by using special protease and special normal-temperature type amylase, and semicellulose, lignin, ash content, oily substances and the like are removed by using an alkaline solution; in addition, the environment of low temperature and high pressure (provided by inertial gas) is adopted during a steam explosion process; effective permeation of the alkaline solution to cell walls of raw materials is ensured by a high-pressure condition, and the yield of the cellulose is ensured; decomposition reaction of the cellulose, dewatering (coking) reaction, peeling reaction, oxidization reaction, esterification reaction of acetyl and the like are avoided by a low-temperature and inertial environment, and the completeness and the purity of the cellulose are ensured. According to the method disclosed by the invention, components of the protein, the starch, oils, the ash content, the semicellulose, the lignin and the like in the cotton linter are successfully removed through a simple technology, and the cellulose with extremely high purity (98 percent) is obtained.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a method for producing high-purity cellulose from cotton linters by utilizing steam explosion technology. Background technique [0002] Cellulose is a macromolecular polysaccharide composed of glucose. Insoluble in water and general organic solvents, it is the main component of plant cell walls. Cellulose is the most widely distributed and most abundant polysaccharide in nature, accounting for more than 50% of the carbon content in the plant kingdom. [0003] Cellulose is used more and more widely in the fields of industry, food, medicine and so on. The acquisition and preparation of high-purity and high-quality cellulose is the prerequisite for high-value applications of cellulose. [0004] Cotton linters have the most abundant cellulose content among all fiber raw materials, with a content of more than 93% (relative to the dry basis of cotton linters), so it has become an import...

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
Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C9/18D21C9/00
CPCD21C5/00D21C9/00D21C9/18
Inventor 曹吉祥耿皓
Owner JINAN MIDUOTAN NEW ENERGY TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com