Pretreatment process for producing bamboo fibers with bamboos

A pretreatment and bamboo fiber technology, which is applied in the direction of fiber raw material treatment, pretreatment with alkaline compounds, finely split raw material pretreatment, etc., can solve the problems of large hydrogen peroxide consumption and long bleaching process time, and achieve saving Effects of steam and medicine, shortened reaction time, and reduced dosage

Inactive Publication Date: 2012-03-14
TIANJIN ZIWEI TAIKE PLANT FIBER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the severe "alkali dark color" reaction, the difficulty of bleaching the pulp has been increased, which is mainly reflected in hydrogen peroxide (H 2 o 2 ) consumption is large, and the bleaching process takes a long time

Method used

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  • Pretreatment process for producing bamboo fibers with bamboos
  • Pretreatment process for producing bamboo fibers with bamboos

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The pretreatment process of bamboo to produce bamboo fiber is as follows: first cut the whole bamboo into 2m long, wash off the soil and impurities with water, and after screening, crush it into 1.5t bamboo chips with a maximum diameter of 2cm or 3cm in length.

[0014] Add 6t of soaking water to the soaking tank, then add 60Kg of NaOH and 45g of biological enzyme, the biological enzyme is a mixture of laccase and xylanase, wherein 30g of laccase and 15g of xylanase.

[0015] Heat the water in the soaking pool to 60-80°C, put the bamboo slices in, soak for 4 hours, remove them, and turn them into filaments by a wire separator for pulping.

[0016] Soaking water is reused after sedimentation and membrane treatment.

[0017] The bamboo chip that embodiment 1 handles and the bamboo chip of conventional hydrolysis treatment compare the following table in the effect of the later stage bleaching treatment stage:

[0018]

Embodiment 2

[0020] The pretreatment process of bamboo to produce bamboo fiber is as follows:

[0021] The pretreatment process of bamboo to produce bamboo fiber is as follows: first cut the whole bamboo into 2m long, wash off the soil and impurities with water, and after screening, crush it into 1.5t bamboo chips with a maximum diameter of 2cm or 3cm in length.

[0022] Add 9t of soaking water to the soaking tank, then add 360Kg of NaOH and 105g of biological enzyme, the biological enzyme is a mixture of laccase and xylanase, wherein 75g of laccase and 30g of xylanase.

[0023] Heat the water in the soaking pool to 60-80°C, put the bamboo slices in, soak for 8 hours, remove them, and turn them into filaments by a wire separator for pulping.

[0024] Soaking water is reused after sedimentation and membrane treatment.

[0025] The bamboo chip that embodiment 2 handles and the bamboo chip of conventional hydrolysis treatment compare the following table in the effect of the later stage bleac...

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Abstract

The invention provides a pretreatment process for producing bamboo fibers with bamboos. The process comprises the following steps: (1) breaking the original bamboos into bamboo chips with maximum diameter being 2-3cm; (2) soaking the bamboo chips obtained in the step (1); and (3) fibrillating the bamboo chips fished out in the step (2) into fine fibers with a devillicate machine, wherein the weight ratio of the water for soaking to the bamboo chips is (4-6):1; NaOH and bio-enzyme are mixed in the water for soaking; the addition of NaOH is 1-4% of the weight of the water for soaking and the addition of the bio-enzyme is 30-70g per ton of bamboos; the bio-enzyme is the mixture of laccase and xylanase in a weight ratio of (90-70):(10-30); the temperature of the water for soaking is 60-80 DEG C; and the soaking time is 4-8 hours. The pretreatment process has the following beneficial effects: the bio-enzyme participates in the reaction while the broken bamboo chips are subjected to hydrolysis treatment, thus effectively overcoming the alkali darkening reaction, reducing the use amount of oxidants in the late bleaching process by more than 40% and shortening the reaction time by more than 30%.

Description

technical field [0001] The invention relates to a pretreatment process for producing bamboo fiber from bamboo. Background technique [0002] The process of producing bamboo fiber from bamboo is roughly divided into several stages: raw bamboo cutting, screening and washing, hydrolysis pretreatment, cooking and thinning reaction, pulp refining, slag removal and concentration, and bleaching. [0003] Because the bamboo material is hard, it is difficult for chemicals to penetrate, so high alkaline conditions are generally used in the prior art of the hydrolysis pretreatment stage in order to increase the slurry yield. However, due to the severe "alkali dark color" reaction, the difficulty of bleaching the pulp has been increased, which is mainly reflected in hydrogen peroxide (H 2 o 2 ) consumption is large, and the bleaching process takes a long time. Contents of the invention [0004] The purpose of the present invention is to overcome the shortcomings of using high alkal...

Claims

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Application Information

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IPC IPC(8): D21C1/06D21C1/00D21C5/00D21B1/34
Inventor 武长安赵志远
Owner TIANJIN ZIWEI TAIKE PLANT FIBER TECH
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