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A clean papermaking method

A papermaking method and clean technology, applied in papermaking, textiles and papermaking, adding additives for paper forming, etc., can solve the problems of polluted paper strength, ineffective combination of lignin bleaching, etc., to prevent fading, improve water filtration performance, activity added effect

Active Publication Date: 2020-10-09
深圳市南山区阳光教育培训中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems that the removal of lignin and the bleaching of pulp cannot be effectively combined in the existing papermaking process, the strength of cellulose is easily damaged in the process of lignin removal, the problems of pollution and poor strength of the prepared paper exist in the bleaching process, and provide a clean papermaking method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0032] Specific embodiment one: present embodiment is a kind of clean papermaking method, and this method is to carry out according to the following steps:

[0033] 1. Preparation of modified wood flour:

[0034]①. Mix boric acid, ammonium fluorotitanate and water, stir evenly to obtain a mixed solution, then add dropwise a hydrochloric acid solution with a concentration of 1mol / L to the mixed solution until the pH of the mixed solution is 3-4, and obtain a pH of 3 ~4 mixed solution, copper acetate and polyvinylpyrrolidone are dissolved in water, stirred evenly to obtain a solution of copper acetate and polyvinylpyrrolidone;

[0035] The concentration of boric acid in the mixed solution is 4mol / L-5mol / L; the concentration of ammonium fluorotitanate in the mixed solution is 1.2mol / L-1.5mol / L; the ratio of copper acetate to polyethylene The concentration of copper acetate in the solution of rolidone is 0.5mol / L~2mol / L; the concentration of polyvinylpyrrolidone in the solution o...

specific Embodiment approach 2

[0056] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the papermaking strengthening aid described in step 4 is prepared according to the following steps: ①. Weigh 10 to 15 parts of cationic polypropylene in parts by weight Amide, 20-30 parts of hydroxypropyl methylcellulose, 15-20 parts of coniferyl alcohol, 10-20 parts of modified calcium carbonate whiskers, 10-20 parts of dextrin, 6-8 parts of aluminum sulfate , 15 to 20 parts of carboxymethyl starch, 15 to 20 parts of polyethylene glycol, 5 to 10 parts of glass fiber, 3 to 5 parts of zinc oxide whiskers, 1 to 3 parts of nano silicon dioxide, 15 20 parts of polyoxypropyl glyceryl ether, 5 parts to 10 parts of guar gum, 3 parts to 8 parts of sodium alginate and 5 parts to 8 parts of KH560; ②, 10 parts to 15 parts weighed in step ① Cationic polyacrylamide, 20-30 parts of hydroxypropyl methylcellulose, 15-20 parts of coniferyl alcohol, 10-20 parts of modified calcium carbonate wh...

specific Embodiment approach 3

[0057] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the modified calcium carbonate whisker described in the step 4 is prepared according to the following steps: 1., the mass fraction is 0.1~0.5% Add a sodium hydroxide solution with a concentration of 1mol / L to the chitosan solution, adjust the pH of the chitosan solution to 4.0-6.0, then add calcium carbonate whiskers, and then stir at a stirring speed of 500r / min-1000r / min Stirring reaction 2h~3h, obtain solution A; The mass fraction described in the step 1. is the configuration of the chitosan solution of 0.1~0.5% as follows: preparation mass fraction is 1% acetic acid solution, to mass fraction is 1% acetic acid Chitosan is added in the solution to obtain a chitosan solution with a mass fraction of 0.1 to 0.5%; the mass and mass fraction of the calcium carbonate whiskers described in step 1. are the chitosan in the chitosan solution with a mass fraction of 0.1 to 0....

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Abstract

The invention relates to a clean papermaking method, which relates to a papermaking process, and aims to solve the problems that during an existing papermaking process, the removal of lignin and the bleaching of pulp cannot be effectively combined, the strength of cellulose is easy to damage during a lignin removal process, pollution is caused during a bleaching process, and the strength of the prepared paper is poor. The method comprises the steps of (1) preparing modified wood flour; (2) preparing a coarse pulp; (3) bio-pulping; (4) adding additives and papermaking. According to the clean papermaking method provided by the invention, the removal of the lignin and the bleaching of the pulp are organically combined, the environment cannot be polluted since a chlorinated chemical is not adopted for bleaching and whitening during a bleaching process, catalase and alkaline pectinase are added during the removal of the lignin, and negative oxygen ions can be released through the modified wood flour and are released in quantity to become ozone, so that the activity of biological enzyme is greatly improved, and the problem of pulping pollution is solved. The clean papermaking method provided by the invention is used for papermaking.

Description

technical field [0001] The invention relates to a papermaking process. 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, most of the lignin is removed during the papermaking process. [0003] For the removal of lignin in plant materials such as bamboo and wood, there are mainly chemical removal methods (cooking), physical removal methods, and bio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/12D21H11/16D21H21/06D21H21/14D21C5/00
Inventor 徐志仁
Owner 深圳市南山区阳光教育培训中心
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