Whiten method for preparing bamboo chemical dissolving pulp and application thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for chemically dissolving, bamboo
Inactive Publication Date: 2009-06-03
YIBIN GRACE GROUP CO LTD
View PDF0 Cites 22 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005]The existing bamboo dissolving pulp production and preparation methods all use relatively backward equipment and technology, low production efficiency, unstable product quality, difficult to meet environmental protection standards, and relatively huge investment
Di
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
[0092] Oxygen delignification section process requirements:
[0093] h) Slurry concentration: 8%
[0094] i) Oxygen pressure: 0.4mpa
[0095] j) Oxygen (O 2 ) Purity: 90%
[0096] k) Alkali consumption: 1.0%
[0097] 1) Heating temperature: 60°C
[0098] m) residence time in the oxygen delignification tower: 30min
[0099] n) Cleanliness: Na 2 SO 4 =5kg / t pulp.
Embodiment 2
[0101] Oxygen delignification section process requirements:
[0102] a) Slurry concentration: 10%
[0103] b) Oxygen pressure: 0.7mpa
[0104] c) Oxygen (O 2 ) purity: = 92%
[0105] d) Alkali consumption: 3%
[0106] e) Heating temperature: 78°C
[0107] f) Residence time in the oxygen delignification tower: 60min
[0108] g) Cleanliness: Na 2 SO 4 =4.8kg / t slurry.
Embodiment 3
[0110] Oxygen delignification section process requirements:
[0111] a) Slurry concentration: 12%
[0112] b) Oxygen pressure: 1.0mpa
[0113] c) Oxygen (O 2 ) purity: = 91%
[0114] d) Alkali consumption: 5.0%
[0115] e) Heating temperature: 95°C
[0116] f) Residence time in the oxygen delignification tower: 90min
[0117] g) Cleanliness: Na 2 SO 4 =4.9kg / t pulp.
[0118] 2) Chlorine dioxide treatment section:
[0119] The slurry after oxygen delignification is sent to the medium-consistency mixer, and H is introduced into the medium-concentration mixer 2 After O and heating, it is sent to the chlorine dioxide treatment tower. After the slurry meets the process requirements, it is sent to a vacuum (pressure) washing machine for washing, and the cleaned slurry is stored in the slurry storage tank for standby
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
Property
Measurement
Unit
Viscosity
aaaaa
aaaaa
Viscosity
aaaaa
aaaaa
Login to view more
Abstract
Aiming at current situations of cotton and wood dissolving pulp, characters of bamboo material and many disadvantages existing in the existing whiten method for preparing dissolving pulp, the invention provides a whiten method for preparing bamboo material chemical dissolving pulp. The chemical dissolving pulp produced by the invention can be widely applied to derivant industry of celluloses, such as spinning viscose fiber, cellulose nitrate, acetate fiber, etc. The whiten method in the invention uses element-free chlorine bleaching or total chlorine free bleaching, thereby solving the problems existing in the whiten method of bamboo material chemical dissolving pulp and preparing bamboo material chemical dissolving pulp high-efficiently with low energy consumption, low material consumption and low pollution.
Description
technical field [0001] The invention relates to a method for producing chemically dissolving pulp by using bamboo, and the produced chemically dissolving pulp can be widely used in the industries of cellulose derivatives such as textile viscose fiber, nitrocellulose and acetate fiber. Specifically, it is the bleaching method in the production method of bamboo wood production chemical dissolving pulp, especially the bleaching method for preparing bamboo wood dissolving pulp proposed for the needs of textile viscose fiber in the present invention. Background technique [0002] Chemical dissolving pulp is widely used in textile viscose fiber, nitrocellulose, acetate fiber and other cellulose derivative industries. It has a wide range of uses and a large market demand. Among the existing chemical dissolving pulps, cotton linters, coniferous woods, and hardwoods are mainly cottonwood dissolving pulps as the main raw materials. Due to the year-by-year decrease in cotton planting...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more