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Salt-free low-alkali cellulose fiber circular dyeing process

A technology of cellulose fiber and alkali circulation, applied in the field of textile dyeing, can solve the problems of inapplicability to large-scale production, high chroma of dyeing raffinate, and difficult treatment of wastewater, and achieve high success rate, good cationization effect, and low dye consumption Reduced effect

Active Publication Date: 2015-02-18
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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  • Salt-free low-alkali cellulose fiber circular dyeing process
  • Salt-free low-alkali cellulose fiber circular dyeing process
  • Salt-free low-alkali cellulose fiber circular dyeing process

Examples

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Effect test

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 low-alkali cellulose fiber circular dyeing process, belonging to the technical field of textile dyeing. The process comprises the steps of cellulose fiber modification treatment, water washing treatment and circular dyeing, wherein in the step of cellulose fiber modification treatment, low molecular quaternary ammonium salt cationic modifiers and high molecular quaternary ammonium salt cationic modifiers are adopted for modification treatment of cellulose fibers. The salt-free low-alkali cellulose fiber circular dyeing process has the beneficial technical effects that two kinds of specific modifiers are adopted, the synergistic effects of the modifiers are given play to and the specific dyeing steps are provided, so that the cellulose fibers achieve salt-free low-alkali dyeing in dyeing, have the effects of reducing pollution, saving the cost, simplifying the process and reducing the difficulty, have good modification and dyeing effects and are suitable for large-scale industrial production; as the residual dyeing liquid is almost colorless and clear, the residual dyeing liquid can be recycled so as to be continuously used in salt-free dyeing; as the residual dyeing liquid is almost colorless and clear, different colors of dyes can be continuously adopted for circular dyeing.

Description

Technical field [0001] The invention involves a chromosomal technology of a cellulose fiber. More specifically, the invention involves a cellulose fiber -free low -alkali cycle chromatin, which is the field of textile dyeing technology. Background technique [0002] Traditional cellulose fiber dyeing process is generally about 40-70%, with a low upper dyeing rate and a large floating color. In order to overcome the obstacles during the dyeing process, a large amount of inorganic salt must be added to the dye solution to improve the upper dyeing dyeRate; in order to achieve the purpose of fixing color, the hydroxyl group on the cellulose needs to be ionized under strong alkaline conditions. Therefore, a large amount of pure alkali must be added to the dyeing solution in the later stages of dyeing.The treatment of inorganic salts and alkali has always been a problem that plagues the industry. A large number of inorganic salts that are neither recovered nor degraded into rivers and ...

Claims

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Application Information

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Patent Type & Authority Applications(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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