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Production process of bamboo-dissolving pulp

A production process and technology for dissolving pulp, applied in the field of textile and chemical fiber, can solve the problems of unstable product quality, long cooking cycle and high production cost, and achieve the effects of shortening pre-hydrolysis time, short bleaching time and improving Baume degree.

Active Publication Date: 2011-07-20
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the problems of high production cost, long cooking cycle, non-standard environmental protection and unstable product quality in the above-mentioned prior art, and provides a low-cost, high-quality, environmentally friendly and energy-saving bamboo dissolving pulp production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. Bamboo slices are washed to remove impurities such as silt and bamboo ash;

[0033] B. Store the washed bamboo slices at room temperature for 4 hours, and adjust the storage time of bamboo slices appropriately according to the different temperatures in winter and summer;

[0034] C. Combining steam and pre-hydrolysis to remove semi-fiber: add bamboo slices into the cooking pot, steam directly through steam, steam for 30 minutes, and the end pressure in the pot reaches 0.04MPa. After exhausting, the dry weight of bamboo slices and The weight ratio of the total liquid is 1:2.5, add water at a temperature of 50°C, raise the temperature to 150°C, and keep it warm for 30 minutes;

[0035] D. Replacement cooking: add sodium hydroxide or sodium sulfide with 20% dry weight of bamboo chips, keep the ratio of dry weight of bamboo chips to total liquid weight at 1:2.5, and the degree of sulfidation is 18%; perform 2 exhausts, each The exhaust time for the first time is 20 minu...

Embodiment 2

[0041] A. Bamboo slices are washed to remove impurities such as silt and bamboo ash;

[0042] B. Store the washed bamboo slices at room temperature for 8 hours, and adjust the storage time of bamboo slices appropriately according to the different temperatures in winter and summer;

[0043] C. Combining steam and pre-hydrolysis to remove semi-fiber: add bamboo slices into the cooking pot, steam directly for 60 minutes, and the end pressure in the pot reaches 0.06MPa. After exhausting, the dry weight of bamboo slices and The weight ratio of the total liquid is 1:3.8, add water at a temperature of 80°C, raise the temperature to 170°C, and keep it warm for 60 minutes;

[0044]D. Replacement cooking: add sodium hydroxide or sodium sulfide with 28% of the absolute dry weight of the bamboo chips, keep the ratio of the absolute dry weight of the bamboo chips to the total liquid weight at 1:3.8, and the degree of sulfidation is 24%; perform 3 times of exhaust, each The exhaust time fo...

Embodiment 3

[0050] A. Bamboo slices are washed to remove impurities such as silt and bamboo ash;

[0051] B. Store the washed bamboo slices at room temperature for 6 hours, and adjust the storage time of bamboo slices appropriately according to the different temperatures in winter and summer;

[0052] C. Combining steam and pre-hydrolysis to remove semi-fiber: add bamboo slices into the cooking pot, steam directly through steam, steam for 45 minutes, and the end pressure in the pot reaches 0.05MPa. After exhausting, the dry weight of bamboo slices and The weight ratio of the total liquid is 1:3.2, add water at a temperature of 65°C, raise the temperature to 160°C, and keep it warm for 45 minutes;

[0053] D. Replacement cooking: add sodium hydroxide or sodium sulfide with 24% of the dry weight of bamboo chips, keep the ratio of dry weight of bamboo chips to the total liquid weight at 1:3.2, and the degree of sulfidation is 21%; exhaust 3 times, every The exhaust time for the first time i...

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PUM

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Abstract

The invention provides a production process of bamboo-dissolving pulp, relating to a treatment method in the field of textile chemical fiber. The process comprises the following procedures of: preparing materials; steaming and pre-hydrolyzing; exchanging steaming and boiling; hermetically screening; bleaching in oxygen-alkali; carrying out acid treatment; manufacturing paper with pulp; and the like. The bamboo-dissolving pulp produced by the invention has the advantages of good product quality, uniform viscosity, high alphacellulose content, high whiteness, yellowing resistance, low pentaose content and good reaction performance and is favorable to production of post-procedures, chlorine-free bleaching and environment-friendly production.

Description

technical field [0001] The invention relates to a treatment method in the field of textile chemical fibers, more specifically, the invention relates to a production process of bamboo dissolving pulp. Background technique [0002] Bamboo fiber is a kind of cellulose fiber extracted from naturally growing bamboo. It is the fifth largest natural fiber after cotton, hemp, wool and silk. Bamboo fiber has the characteristics of good air permeability, instant water absorption, strong wear resistance and good dyeability, and at the same time has natural antibacterial, antibacterial, anti-mite, deodorant and anti-ultraviolet functions. Experts pointed out that bamboo fiber is a real natural environment-friendly green fiber. Bamboo fiber textiles are favored by consumers because they fully replicate the inherent characteristics of bamboo fiber, and the demand for products is increasing year by year. [0003] Bamboo dissolving pulp production technology At present, the pre-hydrolysis...

Claims

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Application Information

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IPC IPC(8): D21C3/22
Inventor 王义黄艺陈明付
Owner YIBIN GRACE GROUP CO LTD
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