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A salt-free and low-alkali cycle dyeing process for cellulose fibers

A cellulose fiber and alkali recycling technology, applied in the field of textile dyeing, can solve the problems of not being suitable for large-scale production, high chroma of dyeing residue, difficult to treat wastewater, etc., achieving high success rate, good cationization effect, and dye consumption. reduced effect

Active Publication Date: 2016-07-13
北京市文化科技融资租赁股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention aims to solve the following problems in the process of dyeing the cellulose fibers after modification in order to reduce the consumption of dyes, inorganic salts and alkali in the prior art: The degree of pollution is high, and the discharged wastewater is difficult to treat, causing pollution; and the existing salt-free and low-alkali modified dyeing process cannot be applied to large-scale industrial production

Method used

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  • A salt-free and low-alkali cycle dyeing process for cellulose fibers
  • A salt-free and low-alkali cycle dyeing process for cellulose fibers
  • A salt-free and low-alkali cycle dyeing process for cellulose fibers

Examples

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Embodiment 1

[0079] Cellulose fiber dyeing process:

[0080] A salt-free and low-alkali cycle dyeing process for cellulose fibers, comprising the following process steps:

[0081] A. Cellulose fiber modification treatment

[0082] Put the cellulose fiber into the container, add water to the container, and then use two kinds of quaternary ammonium salt cationic modifiers, modifier A and modifier B, to modify the cellulose fiber, and obtain Modified cellulose fiber; the modifier A is a small molecule quaternary ammonium salt cationic modifier, and the modifier B is a high molecular weight quaternary ammonium salt cationic modifier;

[0083] B. Washing treatment

[0084] Washing the modified cellulose fibers obtained through the modification treatment in step A;

[0085] C. Cyclic dyeing

[0086]Put the modified cellulose fibers washed with water in step B into the first dyeing container, and carry out dyeing to obtain the dyed modified cellulose fibers and dyeing residue, and pump the dy...

Embodiment 2

[0089] Cellulose fiber dyeing process:

[0090] A salt-free and low-alkali cycle dyeing process for cellulose fibers, comprising the following process steps:

[0091] A. Cellulose fiber modification treatment

[0092] Put the cellulose fiber into the container, add water to the container, and then use two kinds of quaternary ammonium salt cationic modifiers, modifier A and modifier B, to modify the cellulose fiber, and obtain Modified cellulose fiber; the modifier A is a small molecule quaternary ammonium salt cationic modifier, and the modifier B is a high molecular weight quaternary ammonium salt cationic modifier;

[0093] B. Washing treatment

[0094] Washing the modified cellulose fibers obtained through the modification treatment in step A;

[0095] C. Cyclic dyeing

[0096] Put the modified cellulose fibers washed with water in step B into the first dyeing container, and carry out dyeing to obtain the dyed modified cellulose fibers and dyeing residue, and pump the d...

Embodiment 3

[0099] Cellulose fiber dyeing process:

[0100] A salt-free and low-alkali cycle dyeing process for cellulose fibers, comprising the following process steps:

[0101] A. Cellulose fiber modification treatment

[0102] Put the cellulose fiber into the container, add water to the container, and then use two kinds of quaternary ammonium salt cationic modifiers, modifier A and modifier B, to modify the cellulose fiber, and obtain Modified cellulose fiber; the modifier A is a small molecule quaternary ammonium salt cationic modifier, and the modifier B is a high molecular weight quaternary ammonium salt cationic modifier;

[0103] B. Washing treatment

[0104] Washing the modified cellulose fibers obtained through the modification treatment in step A;

[0105] C. Cyclic dyeing

[0106] Put the modified cellulose fibers washed with water in step B into the first dyeing container, and carry out dyeing to obtain the dyed modified cellulose fibers and dyeing residue, and pump the d...

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Abstract

The invention relates to a salt-free and low-alkali cycle dyeing process for cellulose fibers, which belongs to the technical field of textile dyeing. The present invention includes the steps of cellulose fiber modification treatment, water washing treatment and cycle dyeing, wherein the cellulose fiber modification treatment uses a small molecular quaternary ammonium salt cationic modifier and a high molecular quaternary ammonium salt cationic modifier to modify the cellulose fiber sexual processing. The present invention adopts two specific modifiers to exert the synergistic effect of the two, together with specific dyeing steps, so that the cellulose fibers can be dyed without salt and low alkali, reduce pollution, save costs, and simplify the process , lower difficulty, good modification and dyeing effect, suitable for large-scale industrial production. Because the dyeing residual liquid of the present invention is close to colorless and clear, it can be recycled and continued to be used in the salt-free dyeing of the present invention, and because the dyeing residual liquid is close to colorless and clear, dyes of different colors can be continuously used in cyclic dyeing. Cyclic dyeing.

Description

technical field [0001] The invention relates to a dyeing process of cellulose fibers, more specifically, the invention relates to a salt-free and low-alkali cycle dyeing process of cellulose fibers, which belongs to the technical field of textile dyeing. Background technique [0002] The dye uptake rate of traditional cellulose fiber dyeing process is generally around 40-70%. The dye uptake rate is low and there are many floating colors. In order to achieve the purpose of color fixation, the hydroxyl groups on the cellulose need to be ionized under strong alkaline conditions, so a large amount of soda ash must be added to the dyeing solution in the later stage of dyeing. The treatment of inorganic salts and alkalis has always been a problem that plagues the industry. A large amount of inorganic salts that are neither recyclable nor degradable are discharged into rivers and lakes, seriously polluting water quality. Due to the high permeability of salt, the surrounding soil is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/66D06P1/607D06P1/52D06P1/48D06P3/60D06P5/22
Inventor 廖周荣段太刚贾卫平何大雄汤伟黄金洪张海刘志军
Owner 北京市文化科技融资租赁股份有限公司
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