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Material preparation process for preparing dissolving pulp by modifying bleached needle leave wood and broadleaf wood composite pulp

A technology for compounding pulp and hardwood is applied in the field of viscose chemical fiber raw material-pulp preparation. Good control and stability

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

[0011] The present invention aims to solve the problems in the above-mentioned prior art that the bleached wood pulp is modified into dissolving pulp, the quality of the semi-finished product and the final finished dissolving pulp are not high, the cost is high, and it is only applicable to a few cooking methods, and a bleaching needle is provided. Material preparation process for preparation of dissolving pulp by modification of leaf wood and hardwood composite pulp

Method used

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  • Material preparation process for preparing dissolving pulp by modifying bleached needle leave wood and broadleaf wood composite pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A material preparation process for preparing dissolving pulp by modifying bleached coniferous wood and hardwood composite pulp, comprising the following process steps:

[0061] A. Raw material preparation

[0062] According to the ratio of the total weight of bleached softwood pulp and bleached hardwood pulp to the volume of the digester: 100kg: 1m 3 Raw material preparation, select bleached softwood pulp and bleached hardwood pulp;

[0063] B. Dispersion and pulping

[0064] Bleached softwood pulp and bleached hardwood pulp are dispersed and processed into pulp boards, and then bleached softwood pulp boards and bleached hardwood pulp boards are mixed with sodium hydroxide solution for pulping to obtain bleached softwood pulp and bleached hardwood pulp. The mixture of paper pulp and sodium hydroxide solution is the pulp porridge, and the next step of impregnation treatment is carried out. The pulp concentration of the pulp porridge obtained through the pulping treatme...

Embodiment 2

[0073] A material preparation process for preparing dissolving pulp by modifying bleached coniferous wood and hardwood composite pulp, comprising the following process steps:

[0074] A. Raw material preparation

[0075] According to the ratio of the total weight of bleached softwood pulp and bleached hardwood pulp to the volume of the digester: 250kg: 1m 3 Raw material preparation, select bleached softwood pulp and bleached hardwood pulp;

[0076] B. Dispersion and pulping

[0077] Bleached softwood pulp and bleached hardwood pulp are dispersed and processed into pulp boards, and then bleached softwood pulp boards and bleached hardwood pulp boards are mixed with sodium hydroxide solution for pulping to obtain bleached softwood pulp and bleached hardwood pulp. The mixture of paper pulp and sodium hydroxide solution is the pulp porridge, and the next step of impregnation treatment is carried out, and the pulp concentration of the pulp porridge obtained through the pulping tre...

Embodiment 3

[0086] A material preparation process for preparing dissolving pulp by modifying bleached coniferous wood and hardwood composite pulp, comprising the following process steps:

[0087] A. Raw material preparation

[0088] According to the ratio of the total weight of bleached softwood pulp and bleached hardwood pulp to the volume of the digester: 175kg: 1m 3 Raw material preparation, select bleached softwood pulp and bleached hardwood pulp;

[0089] B. Dispersion and pulping

[0090] Bleached softwood pulp and bleached hardwood pulp are dispersed and processed into pulp boards, and then bleached softwood pulp boards and bleached hardwood pulp boards are mixed with sodium hydroxide solution for pulping to obtain bleached softwood pulp and bleached hardwood pulp. The mixture of paper pulp and sodium hydroxide solution is pulp porridge, and then the next step of impregnation treatment, the pulp concentration of the pulp porridge obtained through pulping treatment is 4%;

[0091...

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Abstract

The invention discloses a material preparation process for preparing dissolving pulp by modifying bleached needle leave wood and broadleaf wood composite pulp. The process comprises the steps of preparing raw materials, dispersing, splicing, soaking and the like, specific process steps and process control parameters are adopted for composite pulp material of the bleached needle leave wood and the bleached broadleaf wood, so that the quality of a final product is improved, the energy is saved, the emission is reduced, the content, the yield and the whiteness of alpha cellulose in the finished product are improved, the ash content of the alpha cellulose is reduced, and a cost control of chemical liquid medicine is facilitated, a subsequent cooking heating curve is stable, degree of polymerization is uniformly decreased, the obtained semi-finished product is suitable for all kinds of cooking manners, and the application range is wide.

Description

technical field [0001] The invention relates to a material preparation process for preparing dissolving pulp, more specifically, the present invention relates to a material preparation process suitable for preparing dissolving pulp by modifying bleached coniferous wood and hardwood composite pulp, which belongs to viscose chemical fiber raw material-pulp Meal 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 v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/26D21B1/34D21B1/02D21C9/10
Inventor 薛勤徐发祥于渭东刘爱兵谢鹏竭发全陈昌明
Owner YIBIN GRACE GROUP CO LTD
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