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Liquid disperse dye capable of reducing COD emission as well as preparation method and dyeing method of liquid disperse dye

A technology of liquid disperse dyes and dyeing methods, which is applied in the field of liquid disperse dyes and its preparation for reducing COD emissions, can solve the problems of high COD content, high post-processing costs, and increased processing costs, so as to reduce COD emissions and reduce post-processing Cost, the effect of reducing dyeing energy consumption

Pending Publication Date: 2021-06-18
ZHEJIANG DANENG TEXTILE PRINTING & DYEING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After dyeing with powdery disperse dyes, the dyeing residue contains some undyed dyes, which are easily adsorbed on the surface of polyester fibers to form floating colors, which makes the COD in the discharged wastewater too high, which greatly increases the treatment cost of the enterprise
However, the liquid disperse dyes in the prior art are easy to agglomerate during the dyeing process, causing problems such as uneven dyeing and poor color fastness; and the dyeing temperature of general liquid disperse dyes needs to reach 130°C, and the dyeing time is more than 40min, which consumes less energy. Larger; in addition, the COD content in the dyed wastewater is higher, and the post-treatment cost is higher

Method used

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  • Liquid disperse dye capable of reducing COD emission as well as preparation method and dyeing method of liquid disperse dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take dispersed clariato S-4RL100% (2G), dispersed red jade S-5BL100% (0.8 g), dispersed black ECT300% (44 g), adding cellulose sulfate sodium salt (14g), ethylene glycol (13g), water (26.2g), zirconium beads, 8 h on 60 ° C, and liquid disperse dyes were obtained.

Embodiment 2

[0040] Take the dispersed clarification S-4RL100% (1.5 g), dispersed red jade S-5BL100% (0.25 g), dispersed black ECT300% (30g), add polyoxyethylene ether (9 g), propylene glycol (20g), water (39.25) g), zirconium beads, 50 ° C grinding at 50 ° C for 8 h, and liquid disperse dyes are obtained.

Embodiment 3

[0042] Take the dispersed clarification S-4RL100% (1.2 g), dispersed red jade S-5BL100% (0.2 g), dispersed black ECT300% (24 g), and sodium polycarboxylate (4 g), glucose (28 g), water (42.6) g), zirconum beads, 55 ° C grinding at 7h, and liquid disperse dyes.

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Abstract

The invention provides a liquid disperse dye capable of reducing COD (Chemical Oxygen Demand) emission as well as a preparation method and a dyeing method of the liquid disperse dye. The liquid disperse dye comprises the following components in percentage by weight of 18-48.5% of raw dye; 4-15% of a dispersing aid; 12-28% of a moisture absorbent; and the balance of water, wherein the weight ratio of the dispersing aid to the raw dye is (0.1-0.35): 1. The liquid disperse dye is low in dyeing temperature and short in time, and dyeing energy consumption is effectively reduced; the COD emission in the dyeing waste liquid is greatly reduced, so that the method is more environment-friendly, the post-treatment cost is reduced, and the working efficiency is improved; and the moisture absorbent is added into the liquid disperse dye, so that the problem of poor dyeing effect caused by caking of the dye in the dyeing process is avoided.

Description

Technical field [0001] The present invention belongs to the field of green dyeing and finishing, and is specifically involved in a reduced liquid dispersion dye of COD emissions and a preparation method thereof and a dyeing method thereof. Background technique [0002] Dispersion dyes are dyes that are relatively small in molecules and no water-soluble groups. Its upper dyeing mechanism is completely different from the water-soluble dye, and there is no chemical bond reaction between the dye and the fibers, but in the high temperature conditions, the fibers are expanded under high temperature conditions, and the fibers are entered into the fibers in the manner deposition, and the gravitational force and hydrogen bonds are solid, Complete the upper dyeing process. It must be uniformly dispersed in the dye in the dyeing liquid during dyeing, and the polyester fibers can be dyed. [0003] Dispersion dyes can be divided into powdered dispersion dyes and liquid disperse dyes. After th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/16D06P1/651
CPCD06P1/16D06P1/65118
Inventor 吴明华席超宇李慧龙袁秋晓沈国江沈建强
Owner ZHEJIANG DANENG TEXTILE PRINTING & DYEING