Production method for preparing bamboo dissolving pulp by utilizing natural-color unbleached bamboo pulp in a modifying way

A technology for dissolving pulp and bamboo pulp, which is applied in pulp beating/refining methods, pulp dehydration, papermaking, etc. It can solve the problems of difficult washing, poor filterability of viscose fiber, and long production cycle, so as to promote fiber wall rupture and increase Effect of fiber surface area and improvement of reactivity

A technology for dissolving pulp and bamboo pulp, which is applied in pulp beating/refining methods, pulp dehydration, papermaking, etc. It can solve the problems of difficult washing, poor filterability of viscose fiber, and long production cycle, so as to promote fiber wall rupture and increase Effect of fiber surface area and improvement of reactivity

CN101736637AActive Publication Date: 2010-06-16YIBIN GRACE GROUP CO LTD
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: produce filament pulp

[0017] The process of filament pulp is:

[0018] A. Bamboo pulp (board) is dehydrated by a hydropulper and sent to a dehydrator for further dehydration in the machine. After meeting the process requirements, it enters a double-screw roller refiner in this machine for further dehydration in the machine. After dehydration, add The liquid medicine should be mixed evenly, and its liquid ratio should be controlled.

[0019] B. The slurry is mixed evenly and the liquid ratio is well controlled, sent out from the discharge port, and sent to the digester by the conveyor.

[0020] C. After entering the digester, heat to continue cooking.

[0021] D. After the cooking is completed, the materials are discharged, and the processes of washing, bleaching, acid treatment, concentration, impurity removal, and copying are carried out.

[0022] Its process conditions are as follows:

[0023] Enter the hydraulic pulper to crush and decompose the p...

Embodiment 2

[0048] Embodiment 2: Production and preparation of short silk pulp

[0049] The process of short silk pulp is:

[0050] A. Bamboo pulp (board) is dehydrated by a hydropulper and sent to a dehydrator for further dehydration in the machine. After meeting the process requirements, it enters a double-screw roller refiner in this machine for further dehydration in the machine. After dehydration, add The liquid medicine should be mixed evenly, and its liquid ratio should be controlled.

[0051] B. The slurry is mixed evenly and the liquid ratio is well controlled, sent out from the discharge port, and sent to the digester by the conveyor.

[0052] C. After entering the digester, heat to continue cooking.

[0053] D. After the cooking is completed, the materials are discharged, and the processes of washing, bleaching, acid treatment, concentration, impurity removal, and copying are carried out.

[0054] Its process conditions are as follows:

[0055] Enter the hydraulic pulper to...

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Abstract

The invention discloses a production method for preparing bamboo dissolving pulp by utilizing natural-color unbleached bamboo pulp in a modifying way, overcoming the defect of poor reaction property of products prepared by an alkali refining method. The production method comprises the following steps of: concentrating and dewatering dredged natural-color unbleached bamboo pulp, and delivering to a double-helix roller type pulp grinder; continuously dewatering in the pulp grinder, and adding liquid medicine; continuously concentrating and kneading the pulp and mixing the pulp with the liquid medicine in the pulp grinder; then delivering the pulp to a stewing machine; and after stewing is completed, conducting subsequent procedures including washing and bleaching till paper making. The invention reduces the preparation cost, enhances the quality of products and increases resource supplying sources; in addition, the bamboo pulp prepared by the production method not only has higher content of alpha-celluloses, but also has good reaction property, and is suitable for filament and staple fibers.

Description

technical field [0001] The present invention relates to the production process and method of bamboo dissolving pulp (bamboo pulp) used for producing viscose fiber, especially the method for preparing dissolving pulp by modifying unbleached natural bamboo pulp, and is also suitable for preparing cellulose derivative products Chemical dissolving pulp and refined pulp. Background technique [0002] Pulp for viscose fiber requires high α-fiber content, that is, high fiber purity. Now the preparation of bamboo dissolving pulp (bamboo pulp) adopts pre-hydrolysis + alkali method (sulfate method) two-stage cooking or sulfite method. Two-stage (multi-stage) cooking adopts the above two cooking pulping techniques, mainly to remove a large amount of lignin, hemicellulose (pentose) and resin and other impurities in the raw material. Especially the hemicellulose (pentose) in the raw material is removed. Under acidic conditions, the hemicellulose (pentose) undergoes acidic hydrolysis, so...

Claims

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Application Information

Patent Timeline
16 Jun 2010
Publication
CN101736637A
IPC
D21C9/18; D21C5/00; D21D1/00
Inventors
冯涛; 薛勤