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Biological treatment method of non-wood pulp

A biological treatment, non-wood technology, applied in the field of non-wood pulp biological treatment and enzymatic modification of straw pulp, to achieve the effects of improving binding force, increasing filamentation, and improving physical strength

Inactive Publication Date: 2007-03-07
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no process that uses enzyme treatment to improve the physical properties of pulp while reducing the energy consumption of beating. Therefore, the development of a biological treatment technology that can improve the beating performance of non-wood pulp and improve the strength of non-wood pulp is of great importance in advanced The application on paper and the reduction of production cost are of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Bleached kraft bamboo pulp, disintegrated under 3-5% pulp concentration in a hydraulic pulper, and added a mixture of hemicellulase Pulpzymes HC and Nozymes51064 in a weight ratio of 1:1 during the disintegration process. The enzyme addition amount is 250g / Disintegrate a ton of pulp for 8 minutes, then treat it at 40-55° C. and pH 6.0-8.0 for 0.5-2.0 h, and then refine the pulp with a disc mill at a slurry concentration of 3%-4%. After refining, the pulp beating degree is 40-60°SR. Compared with the pulp without enzyme treatment, after enzyme treatment beating, under the same beating degree, the tensile strength is increased by 10%, and the bursting strength is increased by 15%. The beating time is reduced by 20% (reduced energy consumption).

Embodiment 2

[0023] Reed kraft bleached pulp, disintegrated under the concentration of 3-5% pulp in the hydraulic pulper, and added a mixture of hemicellulase Pulpzymes HC and cellulase Nozymes51064 in a weight ratio of 1:1 during the disintegration process, and the amount of enzyme added The pulp is 200g / ton, disintegrated for 8 minutes, then treated at 30-55°C and pH 6.0-8.0 for 0.5-2.0h, and then refined with a disc mill at a pulp concentration of 3.0-4.0%. After refining, the pulp beating degree is 50-55°SR. Compared with the pulp without enzyme treatment, after enzyme treatment beating, under the same beating degree, the tensile strength is increased by 10%, and the bursting strength is increased by 10%. The tearing strength is basically the same, while the beating time is reduced by 35%.

Embodiment 3

[0024] Example 3: Add a mixture of hemicellulase Pulpzymes HC and cellulase Nozymes 51064 in a weight ratio of 1:1 to fresh reed kraft pulp that has not been dried after bleaching. The amount of enzyme added is 200g / ton of pulp at 30- It is treated at 55°C and pH 6.0-8.0 for 0.5-2.0 h, and then refined with a disc mill at a slurry concentration of 3.0-4.0%. After refining, the pulp beating degree is 50-55°SR. Compared with the pulp without enzyme treatment, after enzyme treatment beating, under the same beating degree, the tensile strength is increased by 12%, and the bursting strength is increased by 8%. The tearing strength is basically the same, while the beating time is reduced by 35%.

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Abstract

This invention relates to non-wood paper pastry biological process method, which comprises the following steps: adding enzyme into paper pastry before beating pastry with enzyme as 10-500g / ton, pastry concentration for 3-20 percentage, temperature for 20 to 60 degrees, time for 0.5 to 4 hours, pH 5.0 to 8.5, wherein, the said enzyme is of fiber enzyme or semi-fiber enzyme. This invention adopts fiber enzyme or semi-fiber enzyme to process non-wood pastry to add brooming in beating pastry process.

Description

(1) Technical field [0001] The invention relates to a method for biological treatment of non-wood pulp, in particular to a method for enzymatic modification of straw pulp, and belongs to the technical field of pulping and papermaking. (2) Background technology [0002] Due to the lack of wood raw materials in our country, non-wood raw materials such as bamboo, reed, bagasse, wheat straw, etc. are used in pulp and paper making. Compared with wood pulp, straw pulp has high content of miscellaneous cells, short fibers and low physical strength. When straw pulp is used in production, beating is an important step that affects the performance of straw pulp. For the beating of straw pulp, since the length of the fiber itself is relatively short, the length of the fiber should be maintained as much as possible to promote the splitting of the fiber during beating. Generally speaking, the residual hemicellulose in the pulp is beneficial to the beating of the pulp. This is because hemicellu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21H17/22C12S3/08
Inventor 秦梦华李宗全傅英娟魏琳
Owner QILU UNIV OF TECH
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