Material preparation process suitable for utilizing unbleached wood pulp to prepare dissolving pulp in modified mode

A technology of dissolving pulp and natural color, which is applied in post-treatment modification of cellulose pulp, pretreatment with alkaline compounds, fine split raw material pretreatment, etc. It can solve the problems of high cost, low quality of semi-finished and final finished dissolving pulp, etc. , to achieve the effect of low cost, easy control of ash content and cost reduction

Inactive Publication Date: 2012-09-19
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention aims to solve the problems in the above-mentioned prior art that it is not suitable for the raw material preparation process of unbleached unbleached wood pulp into dissolving pulp, the quality of semi-finished and final finished dissolving pulp is not high, the cost is high, and it is only applicable to a few cooking methods. Provide a raw material preparation process for preparing dissolving pulp by modifying natural color unbleached wood pulp

Method used

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  • Material preparation process suitable for utilizing unbleached wood pulp to prepare dissolving pulp in modified mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A material preparation process suitable for preparing dissolving pulp by modifying natural color unbleached wood pulp, comprising the following process steps:

[0058] A. Raw material preparation

[0059] According to the ratio of the weight of natural unbleached wood pulp to the volume of the digester: 100kg: 1m 3 Prepare raw materials, select natural color unbleached wood pulp;

[0060] B. Dispersion and pulping

[0061] Disperse unbleached unbleached wood pulp into pulp boards, then mix unbleached unbleached wood pulp with water and perform pulping treatment to obtain a mixture of unbleached unbleached wood pulp and water, which is pulp porridge, and then press and deliquify in the next step Processing, the concentration of the gruel obtained through the crushing treatment is 3%;

[0062] C. Squeeze and remove liquid

[0063] Squeeze and deliquify the dispersed and crushed porridge until the dryness of the porridge is 20%;

[0064] D. Dipping

[0065] Mix the d...

Embodiment 2

[0068] A material preparation process suitable for preparing dissolving pulp by modifying natural color unbleached wood pulp, comprising the following process steps:

[0069] A. Raw material preparation

[0070] According to the ratio of natural unbleached wood pulp weight to digester volume: 250kg: 1m 3 Prepare raw materials, select natural color unbleached wood pulp;

[0071] B. Dispersion and pulping

[0072] Disperse unbleached unbleached wood pulp into pulp boards, then mix unbleached unbleached wood pulp with water and perform pulping treatment to obtain a mixture of unbleached unbleached wood pulp and water, which is pulp porridge, and then press and deliquify in the next step Processing, the concentration of the gruel obtained through the crushing treatment is 5%;

[0073] C. Squeeze and remove liquid

[0074] The pulp porridge that has been dispersed and crushed is subjected to dehydration by pressing until the dryness of the porridge is 35%;

[0075] D. Dipping ...

Embodiment 3

[0079] A material preparation process suitable for preparing dissolving pulp by modifying natural color unbleached wood pulp, comprising the following process steps:

[0080] A. Raw material preparation

[0081] According to the ratio of the weight of natural unbleached wood pulp to the volume of the digester is 175kg: 1m 3 Prepare raw materials, select natural color unbleached wood pulp;

[0082] B. Dispersion and pulping

[0083] Disperse unbleached unbleached wood pulp into pulp boards, then mix unbleached unbleached wood pulp with water and perform pulping treatment to obtain a mixture of unbleached unbleached wood pulp and water, which is pulp porridge, and then press and deliquify in the next step Processing, the concentration of the gruel obtained through the crushing treatment is 4%;

[0084] C. Squeeze and remove liquid

[0085] The pulp porridge that has been dispersed and crushed is subjected to dehydration by pressing until the dryness of the porridge is 27.5%;...

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Abstract

The invention discloses a material preparation process suitable for utilizing unbleached wood pulp to prepare dissolving pulp in a modified mode. The process comprises procedures of raw material preparation, dispersion, slicing, impregnation and the like. Specific to unbleached wood pulp raw materials, special process steps and process control parameters are utilized so that the purposes of improving quality of end products, energy saving and emission reduction can be achieved, armour fiber content, yield and whiteness of the end products can be improved, ash content of the end products is reduced, cost control of chemical liquid drug is facilitated, the curve of temperature rising in the follow-up cooking process is stable, poly reduction is even, prepared semi-finished products are suitable for various cooking modes, and the material preparation process has a wide application range.

Description

technical field [0001] The invention relates to a material preparation process for preparing dissolving pulp, more specifically, the invention relates to a material preparation process suitable for preparing dissolving pulp by modification of natural unbleached wood pulp, which belongs to viscose chemical fiber raw material-pulp preparation technology field. Background technique [0002] With the development of my country's viscose fiber industry, domestic enterprises mostly use cotton linters to prepare cotton pulp as raw materials for viscose fiber production. Cotton linters have the advantages of high cellulose content, long fibers, and good strength, and can be used to produce a variety of products. However, the resources of raw cotton linters are increasingly scarce due to the constraints of planting area and growth cycle. Prominent, long cycle and its impact on ecological balance have seriously restricted the development of my country's viscose fiber industry. For thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/34D21C1/00D21C1/06D21H11/20
Inventor 薛勤徐发祥于渭东刘爱兵李文贵竭发全邬龙陈昌明
Owner YIBIN GRACE GROUP CO LTD
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