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A paper pulping process

A process and pulping technology, applied in the field of papermaking, can solve the problems of difficult recycling and large pollution of pulping residual liquid, and achieve the effects of long service life, good cooking effect and short cooking time

Active Publication Date: 2021-06-11
厦门溯源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a paper pulping process, especially a pulping process using gramineous plants as raw materials. The process uses cheap gramineous plants as raw materials and uses a combination of chemical liquid and biological enzyme liquid. Pulping is carried out to solve the problems of large pollution and difficult recovery of pulping residue

Method used

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Effect test

Embodiment 1

[0023] S1 raw material preparation, removing impurities after the reed raw material is chopped;

[0024] S2 primary cooking: carry out primary cooking according to the liquid ratio of 1:4, the cooking temperature is 80°C, the cooking time is 15min, washed with water, the cooking liquid used is composed of the following components in mass percentage: 6% sodium hydroxide, 0.5% sodium sulfite, Sodium sulfide 1.6%, anthraquinone 0.5%, sodium dodecylsulfonate 0.03%, the balance water;

[0025] S3 secondary cooking: carry out secondary cooking according to the liquid ratio of 1:5, the cooking temperature is 60°C, the cooking time is 15min, and washed with water. The cooking liquid used is obtained by diluting the cooking agent with water, and the amount of water used is 120 times that of the cooking agent. The cooking agent is prepared by the following method: dispersing the graphene airgel powder in water to obtain a dispersion liquid with a mass fraction of 15%, mixing the enzyme ...

Embodiment 2

[0027] S1 raw material preparation, removing impurities after the reed raw material is chopped;

[0028] S2 primary cooking: carry out primary cooking according to the liquid ratio of 1:4, the cooking temperature is 80°C, the cooking time is 15min, washed with water, the cooking liquid used is composed of the following components in mass percentage: 6% sodium hydroxide, 0.5% sodium sulfite, Sodium sulfide 1.6%, anthraquinone 0.5%, sodium dodecylsulfonate 0.03%, the balance water;

[0029] S3 secondary cooking: carry out secondary cooking according to the liquid ratio of 1:5, the cooking temperature is 60°C, the cooking time is 15min, and washed with water. The cooking liquid used is obtained by diluting the cooking agent with water, and the amount of water used is 120 times that of the cooking agent. The cooking agent is prepared as follows: the graphene airgel powder is dispersed in water to obtain a dispersion solution with a mass fraction of 18%, and the mixed enzyme soluti...

Embodiment 3

[0031] S1 raw material preparation, removing impurities after the reed raw material is chopped;

[0032] S2 primary cooking: carry out primary cooking according to the liquid ratio of 1:4, the cooking temperature is 80°C, the cooking time is 15min, washed with water, the cooking liquid used is composed of the following components in mass percentage: 6% sodium hydroxide, 0.5% sodium sulfite, Sodium sulfide 1.6%, anthraquinone 0.5%, sodium dodecylsulfonate 0.03%, the balance water;

[0033] S3 secondary cooking: carry out secondary cooking according to the liquid ratio of 1:5, the cooking temperature is 60°C, the cooking time is 15min, and washed with water. The cooking liquid used is obtained by diluting the cooking agent with water, and the amount of water used is 120 times that of the cooking agent. The cooking agent is prepared by the following method: dispersing the graphene airgel powder in water to obtain a dispersion with a mass fraction of 12%, mixing the mixed enzyme l...

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Abstract

The invention relates to a papermaking pulping process, which belongs to the field of papermaking. A papermaking pulping process, the pulping process includes a second cooking step, the cooking liquid used for the first cooking, by mass percentage, consists of the following components: 5-8% sodium hydroxide, 0.5-1.0% sodium sulfite , sodium sulfide 1~2.5%, anthraquinone 0.3~0.5%, sodium dodecylsulfonate 0.02~0.1%, and the balance water; the cooking liquid used for the second cooking is obtained by diluting the cooking agent with water, and the water The dosage is 100 to 200 times that of the cooking agent, which is composed of graphene airgel powder and enzymes loaded thereon. The cooking agent of the invention is mainly used in the pulping process of grass raw materials. The cooking agent combines biological enzymes with carriers to ensure that the enzymes will not be lost during use, can be used repeatedly, and has a long service life.

Description

technical field [0001] The invention relates to a papermaking pulping process, which belongs to the field of papermaking. Background technique [0002] Paper production is divided into two basic processes: pulping and papermaking. The methods used in the pulping process include mechanical methods, chemical methods or a combination of both methods to dissociate plant fiber raw materials into natural pulp or bleached pulp. Among them, chemical pulping is a more commonly used method. Its principle is to use chemical liquid to cook the tablet, and the chemical agent reacts with the lignin in the tablet at high temperature to form water-soluble substances, so that the fibers are separated and dispersed into slurry. Pulping is further divided into alkaline pulping and acid pulping. Chemical pulping can roughly retain the natural length of the fiber, remove most of the lignin, and produce high-strength, soft high-grade paper, but its disadvantages are also very obvious, that is, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00
CPCD21C5/005
Inventor 不公告发明人
Owner 厦门溯源科技有限公司
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