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Preparation method of chemical fiber pulp

A technology of chemical fiber and pulp, which is applied in the field of chemical fiber pulp preparation, can solve the problems of ignoring the characteristics of raw pulp, lack of whiteness of chemical fiber pulp, etc., and achieve the effect of solving physical stability problems, reducing losses, and making up for whiteness

Pending Publication Date: 2021-01-12
滁州兴邦聚合彩纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing process, in order to achieve the bleaching effect, the characteristics of the original pulp are often ignored, and the whiteness of the chemical fiber pulp prepared by the existing process is lacking.

Method used

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  • Preparation method of chemical fiber pulp

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preparation example Construction

[0023] A method for preparing chemical fiber pulp, comprising the following steps:

[0024] S1, raw material preparation: cut sugarcane, reed, Miscanthus, coniferous wood and hardwood into 3 centimeters as raw materials for pulping, and remove impurities and soil on the raw materials for pulping;

[0025] S2. Initial bleaching: Pour pulping raw materials into hot water at 45°C, add bleaching agent, stir and cook for 30-45 minutes;

[0026] S3. Squeeze washing: Squeeze and wash the bleached crude fibers to separate fibers and non-fibrous substances, and the squeezed water flows into the sedimentation tank;

[0027] S4, secondary bleaching: add bleaching agent to the pulp washed pulp again, and add anti-flocculation agent and VBL brightener, and make the pulp into fine fiber pulp by refining;

[0028] S5. Pulping: the fine fiber pulp was subjected to an acid treatment for 45 minutes in an environment with an acid concentration of 2.0 g / L, followed by papermaking to obtain chemi...

Embodiment 1

[0031] S1, raw material preparation: cut sugarcane, reed, Miscanthus, coniferous wood and hardwood into 3 centimeters as raw materials for pulping, and remove impurities and soil on the raw materials for pulping;

[0032] S2. Initial bleaching: Pour pulping raw materials into hot water at 45°C, add dithionite bleaching agent, stir and cook for 30 minutes;

[0033] S3. Squeeze washing: Squeeze and wash the bleached crude fibers to separate fibers and non-fibrous substances, and the squeezed water flows into the sedimentation tank;

[0034] S4. Secondary bleaching: add dithionite bleaching agent to the pulp washed pulp again, and add deflocculating agent and VBL whitening agent, and make the pulp become fine fiber pulp by refining;

[0035] S5. Pulping: the fine fiber pulp was subjected to an acid treatment for 45 minutes in an environment with an acid concentration of 2.0 g / L, followed by papermaking to obtain chemical fiber pulp.

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Abstract

The invention relates to the technical field of chemical fiber pulp production, in particular to a chemical fiber pulp preparation method which comprises the following steps: S1, raw material preparation: cutting a raw material into 1-5cm to serve as a pulping raw material, and removing impurities and soil on the pulping raw material, S2, primary bleaching: pouring the pulping raw material into hot water, adding a bleaching agent, and stirring and cooking for 30-45 minutes, S3, squeezing and washing: squeezing and washing the bleached crude fibers to separate the fibers from non-fiber substances, and enabling squeezed water to flow into a sedimentation tank, S4, secondary bleaching: adding a bleaching agent into the squeezed and washed pulp again, adding a deflocculating agent and a VBL brightening agent, and grinding the pulp into fine fiber pulp, and S5, pulping: carrying out acid treatment and papermaking on the fine fiber pulp to obtain the chemical fiber pulp. According to the invention, the loss during bleaching is reduced, the characteristics of the pulp are retained, the problem of physical stability of a particle dispersion system is solved, and the whiteness of the pulp is improved.

Description

technical field [0001] The invention relates to the technical field of chemical fiber pulp production, in particular to a preparation method of chemical fiber pulp. Background technique [0002] Traditional chemical fiber pulp is prepared from wood and cotton linters through a series of processes such as material selection, material preparation, physical processing or chemical pretreatment, cooking, bleaching, acid treatment, washing and papermaking. At present, the production method of using papermaking pulp to prepare chemical fiber pulp is: firstly making papermaking pulp into slurry, then cooking the slurry at high temperature, and then bleaching, acid treatment, washing and papermaking the cooked slurry. and other processes to prepare chemical fiber pulp. [0003] In the existing process, in order to achieve the effect of bleaching, the characteristics of the original pulp are often ignored, and the whiteness of the chemical fiber pulp prepared by the existing process ...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21H11/00D21C9/02D21C9/10
CPCD21H11/12D21H11/00D21C9/02D21C9/1057D21C9/1089D21C9/1063D21C9/1036
Inventor 徐建军胡庆文奚永新陈国平
Owner 滁州兴邦聚合彩纤有限公司
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