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Production process for purified cotton with high whiteness

A production process and technology for refining cotton, which is applied in the chemical post-processing of fibers, textiles and papermaking, fiber processing, etc., can solve the problems of high impurities in refined cotton and adverse effects on the quality of cellulose derivatives, and achieves good bleaching effect. High quality, high whiteness effect

Inactive Publication Date: 2013-07-31
杨金福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the domestic textile industry, the method of producing refined cotton is high-temperature and high-alkali cooking. The performance indicators of refined cotton mainly include viscosity, cellulose content, moisture content, moisture absorption, ash content, sulfuric acid insoluble content and whiteness, although Cotton linter raw materials are opened, impurity-removed and steamed to remove some impurities, but the refined cotton produced still has many impurities, such as the content of sulfuric acid insoluble matter is only below 0.3wt%, while the refined cotton Most of the impurities will enter the cellulose derivatives, causing certain adverse effects on the quality of cellulose derivatives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of production technology of high whiteness refined cotton, comprises the following steps:

[0018] a. Cotton linters are opened by the cotton opener and decomposed into cotton linters with a length of 5mm;

[0019] b. Spray the cotton linters with 25g / L sodium hydroxide solution for 10 minutes, and then press with a press;

[0020] c. Put the above-mentioned pressed cotton linters into a steaming ball, add sodium hydroxide with a mass concentration of 3.5%, quickly heat up to 100°C, release the steam once, keep warm for 15 minutes, quickly heat up to 120°C, and then put Steam once, keep warm for 10 minutes, heat up to 135°C again, keep warm for 20 minutes;

[0021] d. The slurry after the above-mentioned alkaline cooking is decomposed, the decomposing current is 80A, and the decomposing time is 50 minutes;

[0022] e. Desanding the above-mentioned desandered slurry under the action of a desander, then adding dilute sulfuric acid for acid treatment to remove exc...

Embodiment 2

[0026] A kind of production technology of high whiteness refined cotton, comprises the following steps:

[0027] a. Cotton linters are opened by the cotton opener and decomposed into linters with a length of 6.5mm;

[0028] b. Spray the cotton linters with 25g / L sodium hydroxide solution for 20 minutes, and then press with a press;

[0029] c. Put the above-mentioned pressed cotton linters into a steaming ball, add sodium hydroxide with a mass concentration of 3.8%, quickly heat up to 100°C, let off steam once, keep warm for 22 minutes, quickly heat up to 120°C, and then put Steam once, keep warm for 12 minutes, heat up to 135°C again, keep warm for 25 minutes;

[0030] d. The slurry after the above-mentioned alkaline cooking is decomposed, the decompression current is 90A, and the decompression time is 55 minutes;

[0031] e. Desanding the above-mentioned desandered slurry under the action of a desander, then adding dilute sulfuric acid for acid treatment to remove excess s...

Embodiment 3

[0035] A kind of production technology of high whiteness refined cotton, comprises the following steps:

[0036] a. Cotton linters are opened by the cotton opener and decomposed into cotton linters with a length of 8mm;

[0037] b. Spray the cotton linters with 25g / L sodium hydroxide solution for 30 minutes, and then press with a press;

[0038] c. Put the above-mentioned pressed cotton linters into a steaming ball, add sodium hydroxide with a mass concentration of 3.5-4.0%, quickly heat up to 100°C, let off steam once, keep warm for 30 minutes, and quickly heat up to 120°C, Release the steam once more, keep warm for 15 minutes, then raise the temperature to 135°C again, and keep warm for 30 minutes;

[0039] d. The slurry after the above-mentioned alkaline cooking is decomposed, the decomposing current is 100A, and the decomposing time is 60 minutes;

[0040] e. Desanding the above-mentioned desandered slurry under the action of a desander, then adding dilute sulfuric acid ...

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Abstract

The invention discloses a production process for purified cotton with high whiteness. The production process comprises the steps of opening cotton linters by an opener; spraying the cotton linter ribs by using a 25g / L sodium hydroxide solution; squeezing the cotton linter ribs by a squeezer after spraying; putting the squeezed cotton linter ribs in a spherical digester, adding sodium hydroxide with a mass concentration of 3.5-4.0% to carry out alkaline cooking; defibering size after the alkaline cooking; degritting; adding dilute sulphuric acid to carry out acid treatment; adding sodium hypochlorite in the size for bleaching; outputting the size; squeezing the white size; drying the white size and packaging to store. The cotton linter ribs are used as raw materials, partial impurities are removed by opening cotton, removing impurities and cooking the size; cotton fibers wound into balls in the size are dispersed and straighten by the defibering; impurities in the size are further removed by degritting, and thus the quality of the purified cotton is increased and the purified cotton with higher whiteness is obtained.

Description

technical field [0001] The invention relates to a production process of high-whiteness refined cotton, which belongs to the technical field of textiles. Background technique [0002] In the domestic textile industry, the method of producing refined cotton is high-temperature and high-alkali cooking. The performance indicators of refined cotton mainly include viscosity, cellulose content, moisture content, moisture absorption, ash content, sulfuric acid insoluble content and whiteness, although Cotton linter raw materials are opened, impurity-removed and steamed to remove some impurities, but the refined cotton produced still has many impurities, such as the content of sulfuric acid insoluble matter is only below 0.3wt%, while the refined cotton Most of the impurities will enter into the cellulose derivatives, causing certain adverse effects on the quality of the cellulose derivatives. Therefore, it is necessary to provide a new technical solution to solve the above problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/00
Inventor 杨金福
Owner 杨金福
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