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A kind of clean preparation method of viscose grade bamboo pulp

A bamboo pulp and clean pulping technology, which is applied in pulp bleaching, pulp property modification, cellulose pulp post-treatment, etc., can solve problems such as limited output, achieve production cost reduction, complete bleaching effect, and increase specific surface area Effect

Active Publication Date: 2017-08-25
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production of wood and cotton linters in my country is limited due to factors such as planting area, growth cycle, ecological balance, and cost. In addition, my country is a country with a shortage of wood resources. Most of the existing wood dissolving pulp is imported. There are great risks in the sustainable development of the industry. Therefore, the problem of raw materials has become a bottleneck restricting the development of dissolving pulp in my country. How to develop new resources suitable for my country's national conditions to make up for the shortage of raw materials, meet the market demand for dissolving pulp, and promote the sustainable health of the industry , stable development has become a very real and urgent issue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) fully and evenly decompose the commercially available bleached KP bamboo slurry;

[0043] The intermittent medium-consistency or high-consistency hydraulic disintegrator with a relatively mild disintegration effect is adopted. The disintegration effect mainly depends on the pumping action generated by the conical screw moving the pulp, and the disintegration effect is excellent, and the bleached bamboo pulp board is disintegrated and dispersed into uniform fibers. Suspension, the intermittent medium-consistency or high-consistency hydraulic disintegrator used here, the concentration of medium-consistency crushed pulp is 7%-12%, and the concentration of high-consistency crushed pulp is 12%-18%. No heating is required for crushing. The solution temperature is room temperature. The specific operation is to send the bleached bamboo pulp board to be decomposed into a pulper with a certain water storage capacity through a weighing conveyor, so as to accurately control the...

Embodiment 2

[0055] Other content is as embodiment 1, comprises the following steps in preparation process:

[0056] (1) fully and evenly decompose the commercially available bleached KP bamboo slurry;

[0057] (2) The decomposed slurry is concentrated and sent to a kneading machine, and sodium hydroxide is added for alkali refining while kneading.

[0058] The kneading time is 25 minutes, the temperature is 90°C, the mass of the pulp is 29% thick, and the amount of sodium hydroxide is 2.5% relative to the mass of the dry pulp.

[0059] (3) The pulp after kneading is fully washed and concentrated by two vacuum washing machines, and the mass concentration of the concentrated pulp is 11%.

[0060] Use a vacuum washer to strengthen washing to effectively remove impurities from kneading and decomposing, as well as bleaching degradation products;

[0061] (4) After the slurry is washed and diluted with water, it enters the double-roller mixer and adds acid and steam, is transported by a screw...

Embodiment 3

[0065] Other content is as embodiment 1, comprises the following steps in preparation process:

[0066] (1) fully and evenly decompose the commercially available bleached KP bamboo slurry;

[0067] (2) The decomposed slurry is concentrated and sent to a kneading machine, and sodium hydroxide is added for alkali refining while kneading.

[0068] The kneading time is 15 minutes, the temperature is 100° C., the mass concentration of the slurry is 29%, relative to the mass of the dry pulp, the amount of sodium hydroxide is 4%, and the concentration temperature is room temperature.

[0069] (3) The pulp after kneading is fully washed and concentrated by two vacuum pulp washers, and the mass concentration of the concentrated pulp is 12%.

[0070] Use two vacuum washers to strengthen the washing, effectively remove the impurities of kneading and crushing, and the degradation products of bleaching;

[0071] (4) After washing, the slurry is diluted with water, then enters the double-...

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Abstract

The invention belongs to the field of bamboo pulps, and especially relates to a clean preparation method of viscose-grade bamboo pulp. The method comprises the following steps: defibering bleached KP bamboo pulp plates, carrying out rubbing and alkali refining, concentrating and washing the obtained material, carrying out acid treatment, and carrying out light residue removal to modify the bleached KP bamboo pulp plates in order to prepare the bamboo pulp used for viscose fibers. The method has the advantages of simple process flow, high convenience and agility, cleanness and environmental protection of used chemical medicines, high production efficiency, easy control of the quality of the obtained pulp, realization of production of quality requirement meeting and low environmental pollution viscose-grade bamboo pulp in a short time, realization of application in production of cellulose derivative products, enlargement of the application range of the bleached bamboo pulp plates, improvement of the added values of the bleached bamboo pulp plates, and realization of industrial promotion application.

Description

technical field [0001] The invention belongs to the field of bamboo pulp, in particular to a method for cleaning and preparing viscose-grade bamboo pulp. Background technique [0002] As the world's largest producer of textiles and raw materials, due to population growth, continuous improvement of people's living standards, and urbanization, the consumption of resources has grown rapidly, especially in the production of textile viscose and other raw materials. , but the expansion of production capacity is extremely limited, and the serious imbalance between demand and production has brought greater production pressure to the domestic chemical fiber industry. [0003] In the existing chemical dissolving pulp, the raw materials for preparation are mainly wood and cotton linters. However, the production of wood and cotton linters in my country is limited due to factors such as planting area, growth cycle, ecological balance, and cost. In addition, my country is a country with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/12D21C9/16D21C9/10D21C9/00
CPCD21C9/004D21C9/1042D21C9/163D21H11/12
Inventor 杨玲高洪霞李文俊吕开斌于成龙张恒瑞王尧张豪肖林王云凤余森林赵明达
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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