Method of preparing bleaching dissolved pulp from corn stem
A technology of cornstalk and dissolving pulp, which is applied in the field of pulp pulping, can solve the problems of difficult bleaching of cooking pulp, shortage of raw material sources, environmental pollution, etc., so as to alleviate the shortage of production raw materials, improve utilization value and economic value, reduce The effect of production costs
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0016] Material preparation is to take corn stalk raw material to remove the root, crush or crush and separate the stalk and pith for material preparation;
[0017] The impregnation is to impregnate the material that has been prepared and processed at a content of 25g / L in terms of NaOH, a liquid ratio of 1:4, a temperature of 85°C and a normal pressure of 40min, and a solid concentration of 14%; after impregnation, the cornstalk raw material The weight percentage of the medium cellulose is 60%, the weight percentage of the total lignin is 13%, the weight percentage of the polypentose is 21%, and the yield is 90%.
[0018] Cooking is to put the raw material of corn stalks into the steaming ball, the concentration of alkali is 90g / L in terms of NaOH, and the amount of alkali used is 20% in terms of NaOH. After idling for 17 minutes, steam is introduced into the steaming ball, and the temperature is raised for 25 minutes at a time. The pressure in the steaming ball reaches 0.25M...
Embodiment 2
[0021] Material preparation is to take corn stalk raw material to remove the root, crush or crush and separate the stalk and pith for material preparation;
[0022] The impregnation is to impregnate the material that has been prepared and processed at a content of 28g / L in terms of NaOH, a liquid ratio of 1:4.8, a temperature of 95°C and a normal pressure of 20min, and a solid concentration of 16%; after impregnation, the cornstalk raw material The weight percentage of the medium cellulose is 65%, the weight percentage of the total lignin is 12%, the weight percentage of the polypentose is 20%, and the yield is 88%.
[0023] Cooking: Put the raw material of corn stalks into the steaming ball, the concentration of the base is 80g / L in terms of NaOH, and the amount of alkali is 30%. The pressure in the steaming ball reaches 0.3MPa, and the pressure in the steaming ball is 0MPa after a small degassing; the steam is introduced again, and the temperature is raised for 40 minutes fo...
Embodiment 3
[0026] Material preparation is to take corn stalk raw material to remove the root, crush or crush and separate the stalk and pith for material preparation;
[0027] The impregnation is to impregnate the material that has been prepared and processed in a mixture of alkali and black liquor with a content of 32g / L in terms of NaOH and a liquid ratio of 1:5.2 at a temperature of 80°C under normal pressure and keep it warm for 30min. The concentration is 16%; the weight percentage of cellulose in the cornstalk raw material after soaking is 63%, the weight percentage of total lignin is 14%, the weight percentage of pentosaccharide is 21%, and the yield is 86%.
[0028] Cooking: put the raw material of corn stalks into the steaming ball, the concentration of the alkali is 70g / L in terms of NaOH, the amount of alkali used is 35% in terms of NaOH, first run dry for 20 minutes, then pass steam into the steaming ball, and raise the temperature for 35 minutes at a time. The pressure in th...
PUM
Property | Measurement | Unit |
---|---|---|
whiteness | aaaaa | aaaaa |
whiteness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com