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Electrochemical dyestuff dyeing device and method

The technology of a dyeing device and dyeing method, which is applied in the field of electrochemical dyeing devices, can solve the problems of unfavorable production, high price, and short service life of ion exchange membranes, so as to improve production efficiency, realize recycling, and accelerate the electrochemical reduction rate Effect

Inactive Publication Date: 2018-11-06
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, patent CN 132020 C, patent CN 102174731 A and patent CN 103255642 A use multi-cathode reducing device, centrifugal reducing device and continuous vat dyeing device, which all need to use ion exchange membrane to divide the electrolytic cell into an anode area and a cathode area , and the ion exchange membrane has short service life and high price, so it is not conducive to actual production

Method used

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  • Electrochemical dyestuff dyeing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In 4g / L sodium hydroxide aqueous solution, add 5g / L sodium sulfate, 0.02mol / L triethanolamine, 1.5g sulfide blue in turn and stir thoroughly to obtain an electrolyte, which is added to the electrolytic cell of the electrochemical dye dyeing device The reduction is carried out in the medium, the cathode is a graphene / polypyrrole composite material, the anode is a graphene / polypyrrole composite material, the electrolytic reduction temperature is 60 ° C, the electrolytic current density is 0.15 A / dm2, and the electrolyte is completely reduced to a reducing solution , turn on the roller mechanism to dye the yarn, and then energize and restore for 0.5 hour, and the measured current efficiency is 75.4%.

Embodiment 2

[0054] In 4g / L sodium hydroxide aqueous solution, add 5g / L sodium sulfate, 0.06mol / L triethanolamine, 1.8g sulfur red in sequence and stir thoroughly to obtain an electrolyte, which is added to the electrolysis of the same electrochemical dyeing device Reduction in the pool, the cathode graphene / polypyrrole composite material, the anode carbon nanotube / polyphenylene vinylene composite material, the electrolytic reduction temperature is 60 ° C, the electrolytic current density is 0.4 A / dm2, and the electrolyte is completely reduced to For reducing solution, turn on the roller mechanism to dye the yarn, and then energize and reduce for 0.5 hours, and the measured current efficiency is 80.3%.

Embodiment 3

[0056] Add 5g / L iron sulfate, 0.1mol / L triethanolamine, and 2g sulfur black in 4g / L sodium hydroxide aqueous solution, and stir thoroughly to obtain an electrolyte, which is then added to the electrolytic cell of the same electrochemical dye dyeing device The reduction is carried out in the medium, the cathode is carbon nanotube / polyphenylene acetylene composite material, the anode is carbon nanotube / polyphenylene acetylene composite material, the electrolytic reduction temperature is 60 ℃, the electrolytic current density is 0.25 ampere / square decimeter, and the electrolyte is completely Reduce to reducing solution, turn on the roller mechanism to dye the yarn, and then energize and reduce for 0.5 hours, the measured current efficiency is 71.2%.

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Abstract

The invention belongs to the technical field of reduction dyeing of sulfuration dyestuff, and particularly relates to an electrochemical dyestuff dyeing device and method. The device comprises an electrolytic tank, an annular cathode, an annular anode, a direct current power supply, a potentiometric titrator and a roller mechanism; the electrolytic tank is loaded with dyestuff, the lower end of the annular cathode stretches into the dyestuff, the lower end of the annular anode stretches into the dyestuff, the annular anode is arranged in the annular cathode, a positive electrode of the directcurrent power supply is electrically connected with the annular anode, and a negative electrode of the direct current power supply is electrically connected with the annular cathode; a reference electrode and an indicating electrode of the potentiometric titrator both stretch into the dyestuff; the roller mechanism soaks a cloth specimen into the dyestuff and then delivers the cloth specimen out.By means of the electrochemical dyestuff dyeing device, the electrochemical reduction rate can be increased, and the current efficiency is improved; by monitoring the oxidation-reduction potential ofdye liquor, the dyeing quality is guaranteed, the dye liquor is recycled, the consumption of chemicals is reduced, the production cost is greatly lowered, and the production efficiency of industrialized production of the process is improved.

Description

technical field [0001] The invention belongs to the technical field of vat dyeing of sulfur dyes, and in particular relates to an electrochemical dyeing device and method. Background technique [0002] The production process of sulfur dyes is short, the price is low, and the fastness is good, but because it still has many shortcomings and problems in actual production and application, it still cannot be widely used in various fabrics. Sodium sulfide is used in the application of sulfur dyes, and it is excessive. Part of the sodium sulfide is used for the reduction of dyes, but the excess part will produce sulfur-containing wastewater. The dyeing wastewater has a high sulfur content. The waste water cannot be fully treated, and the discharge water quality is difficult to meet the requirements. If it is discharged directly, hydrogen sulfide will be released, which will cause harm to organisms, and will also corrode the sewage system and release odor, which will damage people's...

Claims

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Application Information

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IPC IPC(8): D06B1/00D06B23/20D06P1/30D06P5/00
CPCD06B1/00D06B23/20D06B23/205D06P1/30D06P5/00
Inventor 易长海谭晓冬熊伟徐杰刘雪婷
Owner WUHAN TEXTILE UNIV
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