Alkali process and iminium process straw pulp black liquor hybrid dry matter and preparation method thereof

A technology of straw pulp black liquor and ammonium method, applied in the direction of concentrated waste liquid, etc., can solve the problems of equipment corrosion, black liquor drop, low evaporation efficiency and so on

Active Publication Date: 2008-03-12
SHANDONG TRALIN PAPER
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At the same time, the above-mentioned patents all involve the evaporation and concentration of black liquor, but in actual production, due to the presence of NH 3 The volatilization of the black liquor will cause a sharp drop in the pH of the black liquor, which will cause serious corrosion to the equipment. At the same time, the above patents have the disadvantages of low evaporation efficiency and high energy consumption to varying degrees.

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
  • Alkali process and iminium process straw pulp black liquor hybrid dry matter and preparation method thereof
  • Alkali process and iminium process straw pulp black liquor hybrid dry matter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] (1) mixed

[0091] Mix the straw pulp black liquor of the ammonium method and the straw pulp black liquor of the alkaline method according to the volume ratio of 1:100 to obtain the mixed straw pulp black liquor; wherein the black liquor of the straw pulp of the imonium method has a Baume degree of 2 and a solid content of 4% , pH=7; described soda straw pulp black liquor, Baume degree 2, solid content=4%, pH=9; Alkali method and ammonium method mixed straw pulp black liquor after mixing, Baume degree 2, Solid content = 4%, pH = 8.7.

[0092] (2) Evaporation and concentration

[0093] The mixed straw pulp black liquor is directly evaporated and concentrated until the water weight percentage is less than or equal to 20%, so as to obtain a mixed dry product of the alkali method and the ammonium method grass pulp black liquor.

[0094] The alkali lignin content of the mixed dried straw pulp black liquor obtained by the alkali method and the imonium method is 90%, the amm...

Embodiment 2

[0096] (1) mixed

[0097] The ammonium method straw pulp black liquor and the alkali method straw pulp black liquor are mixed according to the volume ratio of 100:1 to obtain the mixed straw pulp black liquor; wherein the cellulose content of the ammonium method straw pulp black liquor is 200mg / L, Baume degree 9. Solid content = 15%, pH 10; the cellulose content of the alkaline straw pulp black liquor is 200 mg / L, Baume degree 9, solid content = 15%, pH = 13; the mixed alkaline method and immonium method Mixed grass pulp black liquor, Baume degree 9, solid content = 15%, pH = 9.3;

[0098] (2) Evaporation and concentration

[0099] The mixed straw pulp black liquor is directly evaporated and concentrated until the water weight percentage is less than or equal to 20%, so as to obtain a mixed dry product of the alkali method and the ammonium method grass pulp black liquor.

[0100] The content of alkali lignin, 60% of ammonium ligninsulfonate, 35% of fulvic acid and 3% of mois...

Embodiment 3

[0102] (1) mixed

[0103] The ammonium method straw pulp black liquor and the alkali method straw pulp black liquor are mixed according to the volume ratio of 70:30 to obtain the mixed straw pulp black liquor; wherein the cellulose content of the ammonium method straw pulp black liquor is 100 mg / L, Baume degree 7. Solid content = 10%, pH8; the cellulose content of the alkaline straw pulp black liquor is 100 mg / L, Baume degree 7, solid content = 10%, pH = 10; the mixed alkaline method and immonium method Mixed grass pulp black liquor, Baume degree 7, solid content = 10%, pH = 9.1;

[0104] (2) Evaporation and concentration

[0105] The mixed straw pulp black liquor is directly evaporated and concentrated until the water weight percentage is less than or equal to 20%, so as to obtain a mixed dry product of the alkali method and the ammonium method grass pulp black liquor.

[0106] The content of alkali lignin, 48.7% of ammonium lignin sulfonate, 18.4% of fulvic acid and 20% of...

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 relates to a mixture of dried grain of alkali and ammonium sulfite black straw liquor as well as relevant preparation method. The invention is mainly a product by mixing alkali method black straw liquor with ammonium sulfite black straw liquor before performing condensation and drying, as well as relevant products that are produced. Evaporating and condensing black liquor with the production technique needs less energy consumption, and main dried grains include sodium lignin and ammonium lignin sulfonate as well as fulvic acid like substances. Therefore, the invention has broad application and can be used as raw materials for many products with high economic value. Moreover, the invention can also be utilized in preparation of an excellent water reducer, or be added with some crosslinkers to prepare lignin sand-fixing solvent.

Description

technical field [0001] The invention relates to the treatment technology of straw pulp black liquor, mainly the process of concentrating and drying the straw pulp black liquor obtained by mixing the alkali method straw pulp black liquor and the ammonium method straw pulp black liquor and the dried product obtained therefrom. Background technique [0002] More than 80% of the raw materials of my country's papermaking industry are grass fibers. There are two main types of grass fiber papermaking, alkaline pulping and sulfite pulping, and the sulfite method is mainly based on the ammonium method. Alkali pulping is a method of treating plant fiber raw materials with an aqueous solution of alkaline chemicals to dissolve the lignin in the raw materials and separate the fibers into pulp. Ammonium pulping is a method of using ammonium sulfite and plant fiber raw materials The action of lignin in the medium produces easily soluble lignin sulfonate and dissolves to achieve the purpos...

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): D21C11/10
Inventor 刘荣乐高贤彪李洪法郭良进陈学涛周长青杨茂峰
Owner SHANDONG TRALIN PAPER
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