Material preparation technology applied in preparation of dissolving pulp by modifying bleached wood pulp

A technology for dissolving pulp and paper pulp, applied in pretreatment with alkaline compounds, natural cellulose pulp/paper, papermaking, etc., can solve the problems of high cost and low quality of dissolving pulp, achieve low cost, easy material preparation process, The effect of uniform fiber morphology

Inactive Publication Date: 2012-09-26
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims to solve the problems in the above-mentioned prior art that the raw material preparation process that is not suitable for bleached wood pulp to be modified into dissolving pulp, the quality of the semi-finished and final finished dissolving pulp is not high, the cost is high, and it is only applicable to a few cooking methods. A material preparation process for preparing dissolving pulp by modifying bleached wood pulp

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  • Material preparation technology applied in preparation of dissolving pulp by modifying bleached wood pulp

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Experimental program
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Effect test

Embodiment 1

[0059] A material preparation process suitable for preparing dissolving pulp by modifying bleached wood pulp, comprising the following process steps:

[0060] A. Raw material preparation

[0061] According to the ratio of bleached wood pulp weight to digester volume: 100kg: 1m 3 Prepare raw materials, select bleached wood pulp;

[0062] B. Dispersion and pulping

[0063] Disperse the bleached wood pulp into pulp boards, then mix the bleached wood pulp boards with sodium hydroxide solution, and perform pulping treatment to obtain a mixture of bleached wood pulp and sodium hydroxide solution, that is, pulp porridge, and then perform the next step of impregnation treatment. The pulp concentration of the pulp porridge obtained through pulping treatment is 3%;

[0064] C. Dipping

[0065] impregnating the porridge obtained by dispersing and pulverizing;

[0066] D. Squeeze out liquid

[0067] Squeeze the soaked porridge until the dryness of the porridge is 20%;

[0068] E. s...

Embodiment 2

[0072] A material preparation process suitable for preparing dissolving pulp by modifying bleached wood pulp, comprising the following process steps:

[0073] A. Raw material preparation

[0074] According to the ratio of bleached wood pulp weight to digester volume: 250kg: 1m 3 Prepare raw materials, select bleached wood pulp;

[0075] B. Dispersion and pulping

[0076] Disperse the bleached wood pulp into pulp boards, then mix the bleached wood pulp boards with sodium hydroxide solution, and perform pulping treatment to obtain a mixture of bleached wood pulp and sodium hydroxide solution, that is, pulp porridge, and then perform the next step of impregnation treatment. The pulp concentration of the pulp porridge obtained through pulping treatment is 5%;

[0077] C. Dipping

[0078] impregnating the porridge obtained by dispersing and pulverizing;

[0079] D. Squeeze out liquid

[0080] Squeeze the soaked porridge until the dryness of the porridge is 35%;

[0081] E. s...

Embodiment 3

[0085] A material preparation process suitable for preparing dissolving pulp by modifying bleached wood pulp, comprising the following process steps:

[0086] A. Raw material preparation

[0087] According to the ratio of bleached wood pulp weight to digester volume: 175kg: 1m 3 Prepare raw materials, select bleached wood pulp;

[0088] B. Dispersion and pulping

[0089] Disperse the bleached wood pulp into pulp boards, then mix the bleached wood pulp boards with sodium hydroxide solution, and perform pulping treatment to obtain a mixture of bleached wood pulp and sodium hydroxide solution, that is, pulp porridge, and then perform the next step of impregnation treatment. The pulp concentration of the pulp porridge obtained through pulping treatment is 4%;

[0090] C. Dipping

[0091] impregnating the porridge obtained by dispersing and pulverizing;

[0092] D. Squeeze out liquid

[0093] Squeeze the soaked porridge until the dryness of the porridge is 27.5%;

[0094] E....

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Abstract

The invention discloses a material preparation technology applied in preparation of dissolving pulp by modifying bleached wood pulp. The technology comprises the procedures of raw material preparation, dispersion, slicing, dipping and the like. Specific process steps and process control parameters thereof are adopted for a bleached wood pulp raw material, so that the aims of improving the quality of the finished product, saving energy and reducing emission can be fulfilled, the alpha cellulose content, the yield and the whiteness of the finished product are improved, the ash content is reduced, cost control of chemical agents is facilitated, and the subsequent digestion temperature rise curve is stable and uniform in sharp drop; the prepared semi-finished product can be applied to various digestion modes; and the technology is wide in 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 modifying bleached wood pulp, and belongs to the technical field of viscose chemical fiber raw material-pulp preparation. 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 this reason, som...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C1/06D21H11/00
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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