Method for producing acetate fiber bamboo pulp

A technology of acetate fiber and production method, applied in the direction of artificial filament made of viscose, etc., to achieve the effect of short process and short production cycle

Active Publication Date: 2010-06-16
YIBIN GRACE GROUP CO LTD
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the drawbacks of the existing bamboo pulp preparation process for acetic acid pulp by using prehydrolysis + alkali method and sulfite method for cooking, and provides a production method of bamboo pulp for acetate fiber

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 producing acetate fiber bamboo pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The cooking process condition of unbleached unbleached natural color bamboo pulp in the digester: liquid ratio: 1: 3, with alkali amount NaOH (NaOH meter): 10% (to absolute dry bamboo pulp weight percent), Na 2 S (NaOH meter): 0.1% (according to the amount of NaOH added), heating conditions: heating up to 130°C, time 60min, heat preservation 120min, continue to heat up to 150°C, heat up time 60min, heat preservation 180min, heat preservation is completed, continue to heat up to 175 ℃, keep warm for 180 minutes, after the heat preservation is completed, cool down and discharge the materials, and the cooking is completed after the materials are discharged.

[0077] The pulp quality index after cooking in this example: α-cellulose: 95%, polymerization degree: 2500.

[0078] The refining process is carried out in the alkalization tower, the slurry concentration is 4%, the amount of alkali used: 12%, the temperature: 20°C, the residence time: 2h, after the alkalization is co...

Embodiment 2

[0080] The cooking process condition of unbleached unbleached bamboo pulp in the digester: liquid ratio: 1: 5, the amount of alkali used NaOH (NaOH meter): 30% (to the absolute dry bamboo pulp weight percentage), heating up condition: be warming up to 120 ℃ , time 50min, heat preservation 60min, continue to heat up to 140°C, heat up time 45min, heat preservation 160min, heat preservation is completed, continue to heat up to 170°C, heat preservation 60min, heat preservation is completed, cool down and discharge, cooking is completed after discharge.

[0081] The pulp quality index after cooking in this example: α-cellulose: 96%, polymerization degree: 2000.

[0082] The refining process is carried out in the alkalization tower, the slurry concentration is 6%, the amount of alkali used: 10%, the temperature: 25°C, the residence time: 2h, after the alkalization is completed: send it to a vacuum pulp washer or a rotary screen thickener for washing , washed to pH7-9.

Embodiment 3

[0084] The cooking process condition of unbleached unbleached natural color bamboo pulp in the digester: liquid ratio: 1: 6, with alkali amount NaOH (NaOH meter): 50% (to absolute dry bamboo pulp weight percent), Na 2 S (in terms of NaOH): 15% (in terms of NaOH addition), 0.01% of anthraquinone (in terms of absolute dry bamboo slurry weight percentage), heating conditions: heating up to 115 ° C, time 60 min, insulation 30 min, continue to heat up to 135 ° C , the heating time is 45 minutes, and the heat preservation is 120 minutes.

[0085] The pulp quality index after cooking in this example: α-cellulose: 96%, polymerization degree: 2000.

[0086] The refining process is carried out in the alkalization tower, the slurry concentration is 12%, the amount of alkali used: 8%, the temperature: 25°C, the residence time: 2h, after the alkalization is completed: send it to a vacuum pulp washer or a rotary screen thickener for washing , washed to pH7-9.

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

PropertyMeasurementUnit
degree of polymerizationaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for producing acetate fiber bamboo pulp, which overcomes the defect of the traditional acetate fiber bamboo pulp preparing technologywhich combines prehydrolysis and alkaline and sulphite cooking. The method comprises the following steps of: concentrating and dehydrating defibered unbleached natural bamboo pulp, and delivering into a dual screw roller type pulping machine; continuing to dehydrate and adding chemical liquor in the dual screw roller type pulping machine; conducting the processes of continuous concentration, kneading and chemical liquor mixing in the dual screw roller type pulping machine; then conveying the pulp into a reaction chamber to store and react; after reaction, delivering to cook for the second time; and after cooking, performing the processes of washing, bleaching, refining, sand removal, sieving and paper making. As the unbleached natural bamboo pulp has high viscosity, the cooking strength during cooking is controlled, the damage of the chemical liquor to the fiber cell wall is promoted, thereby facilitating the physical liquor permeating and improving the reaction activity.

Description

technical field [0001] The invention relates to a production method for producing viscose fiber bamboo wood pulp, and the invention is especially suitable for preparing acetate fiber. Background technique [0002] Bamboo pulp for acetate fiber requires high α-fiber content, that is, high fiber purity. The main means of the current preparation process is to use pre-hydrolysis + two-stage cooking of alkali method (sulfite method) or two-stage (multi-stage) cooking of sulfite method. A large amount of lignin, hemicellulose (pentose) and impurities such as resin. In particular, the hemicellulose (pentose) in the raw material must be removed under acidic conditions, and the hemicellulose (pentose) must be hydrolyzed under acidic conditions, so that a large amount can be removed in a first-level cooking such as prehydrolysis to achieve viscosity. The minimum requirement for the content of hemicellulose (pentose) in the production of gum fiber, after the completion of the primary...

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): C08B3/06D01F2/08
Inventor 冯涛薛勤于渭东徐发祥刘爱兵
Owner YIBIN GRACE GROUP CO LTD
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