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A method for treating papermaking pulp with compound enzyme solution

A compound enzyme liquid and compound enzyme technology, applied in papermaking, textiles and papermaking, fiber raw material processing, etc., can solve the problems of poor enzymatic bleaching effect and unsatisfactory effect, achieve good induction and stimulation, improve removal, and increase bleaching effect Effect

Active Publication Date: 2020-07-10
徐志仁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The invention aims at the problem that the synergistic degradation of lignin by multiple enzymes in pulp treated with biological enzymes is unsatisfactory, and the bleaching effect of enzymes is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0043] Specific implementation mode 1: A method of using a composite enzyme liquid to treat papermaking pulp in this implementation mode adopts a biological pulping method in the pulping stage; the specific process is as follows:

[0044] Prepare papermaking raw materials into coarse pulp, put compound enzyme solution into the coarse pulp for soaking treatment, the treatment conditions are: temperature is 20°C~60°C, pH is 2~7.0, air is introduced, enzymatic hydrolysis is 36h~60h, after compounding After enzyme solution treatment, put into bleaching enzyme mixed solution, at pH 7.0~9.5, temperature 40℃~60℃, enzymatic hydrolysis for 30min~80min; among them, the amount of compound enzyme solution added is 0.001%~5% of the dry weight of coarse pulp ; The amount of the bleaching enzyme mixed solution is 0.1%~2% of the dry weight of the coarse pulp;

[0045] The compound enzyme liquid comprises compound enzyme and compound enzyme auxiliary agent; wherein, the mass ratio of compound ...

specific Embodiment approach 2

[0052] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: before adding the bleaching enzyme mixed solution, the slurry after the enzymolysis of the compound enzyme solution is subjected to ultraviolet irradiation, and then the bleaching enzyme mixed solution is added after irradiation, and the ultraviolet irradiated The conditions are: under ultraviolet light with a wavelength of 250nm~380nm, irradiate for 10min~30min. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0053] Specific embodiment three: the difference between this embodiment and specific embodiment one is: before adding the bleaching enzyme mixed solution, the slurry after the enzymolysis of the compound enzyme liquid is subjected to ultraviolet irradiation, and after the irradiation is stopped for 5-10 minutes, the bleaching enzyme is added Mixture. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for preparing composite enzyme liquid treatment paper making pulp and relates to a method for treating paper making pulp. The invention aims to solve the problems thatthe effect that lignin is degraded synergistically by using multiple enzymes when paper pulp is treated with bioenzymes is non-ideal, and only a poor enzyme bleaching effect is achieved. According tothe method, the lignin of a paper making raw material is removed by using a composite enzyme and a composite enzyme aid, and meanwhile bleaching treatment is implemented by using a bleaching enzyme and a bleaching enzyme aid. By adopting the method, the lignin degradation rate can be up to about 49%, and the whiteness of treated bleaching pulp can be up to 70-85%.

Description

technical field [0001] The present invention relates to a method of treating pulp for papermaking. Background technique [0002] The raw materials used in the existing papermaking industry are biomass materials, such as wood, straw, bamboo, etc., and biomass materials contain a large amount of lignin, hemicellulose and cellulose. Lignin is a thermoplastic substance, and papermaking uses The most important thing is the cellulose and some hemicellulose in the plant fiber raw material, and the lignin acts as a binder in the fiber raw material. Therefore, the fiber raw material cannot be dispersed into a single fiber, and the combination of the paper is through the interfiber. It is achieved by hydrogen bonding, and the presence of lignin makes the paper easy to yellow. Therefore, in the process of papermaking, especially the preparation of pulp, most of the lignin should be removed. [0003] At present, there are two main types of technical routes for paper pulping. 1. Chemi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/22D21C5/00
Inventor 徐志仁
Owner 徐志仁
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