Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for removing cationic superfine pigment from dyeing wastewater

A technology of dyeing wastewater and cations, applied in the field of textile printing and dyeing, can solve problems such as difficult removal

Active Publication Date: 2019-03-19
QINGDAO UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the average particle size of cationic ultrafine pigments is only a few hundred nanometers, the dispersion stability in water is high, and it is difficult to remove them sufficiently and efficiently by filtration, centrifugation, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Dye the cotton fabric with cationic ultra-fine pigment red according to the conventional process. After dyeing, take the cotton fabric out of the dyeing solution, and keep the temperature of the dyeing residue at 50°C;

[0014] (2) Prepare a 5g / L chitosan quaternary ammonium salt solution for padding alginic acid non-woven fabrics, with a liquid retention rate of 100%, and dry at 60°C;

[0015] (3) Put the above-mentioned non-woven fabric into the superfine pigment red dyeing residue, the bath ratio is 100:1, take it out after stirring for 20 minutes, continue to stand at constant temperature for 1 hour, and then filter to remove the pigment particles.

[0016] After testing, after the treatment in Example 1, the average particle size of ultra-fine pigment red exceeds 250 microns, and the removal rate of pigment particles reaches 99.8% after filtering with commercially available fast filter paper. In addition, after the non-woven fabric treated with chitosan quatern...

Embodiment 2

[0021] (1) Dye the cotton fabric with cationic ultra-fine pigment blue according to the conventional process. After dyeing, take the cotton fabric out of the dyeing solution, and keep the temperature of the dyeing residue at 50°C;

[0022] (2) Prepare a 5g / L chitosan quaternary ammonium salt solution for padding alginic acid non-woven fabrics, with a liquid retention rate of 100%, and dry at 60°C;

[0023] (3) Put the above-mentioned non-woven fabric into the superfine pigment blue dyeing residual liquid, the bath ratio is 100:1, take it out after stirring for 20 minutes, continue to stand at constant temperature for 1 hour, and then filter to remove the pigment particles.

[0024] After testing, after the treatment in Example 2, the average particle size of the ultrafine pigment blue exceeds 200 microns, and the removal rate of pigment particles reaches 99.7% after filtering with commercially available fast filter paper. In addition, after the non-woven fabric treated with ch...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for removing a cationic superfine pigment from dyeing wastewater, and belongs to the technical field of textile printing and dyeing. The method includes: (1) dyeing cotton fabrics with a cationic superfine pigment according to a conventional process, taking out the cotton fabrics after dyeing is finished, and keeping residual dyeing liquid at a constant temperature at 50 DEG C; (2) preparing a 5g / L of chitosan quaternary ammonium salt solution to soak an alginic-acid non-woven fabric with 100% of liquid drag-out rate, and drying at a temperature of 60 DEG C; (3) putting the non-woven fabric into the residual dyeing liquid with the superfine pigment at a bath ratio of 100 to 1, processing by stirring for 20 minutes, taking out, continuously standing for 1 hour at the constant temperature, and filtering out pigment particles. The method for removing the cationic superfine pigment from the dyeing wastewater has the advantages that the alginic-acid non-woven fabric processed by the chitosan quaternary ammonium salt is utilized to induce the cationic superfine pigment to lose stability quickly, unite and then be separated out from the wastewater, the purpose of removing the cationic superfine pigment is realized, and the alginic-acid non-woven fabric can be utilized repeatedly.

Description

technical field [0001] The invention relates to a method for removing cationic ultrafine pigments from dyeing wastewater, belonging to the technical field of textile printing and dyeing. Background technique [0002] Organic pigment dispersions can be used in the dyeing of various textiles. They have the advantages of short process flow, no need for washing, energy saving, easy color imitation, and high light fastness of dyed products. They are the key to energy saving, consumption reduction and emission reduction in the textile printing and dyeing industry. One of the techniques. The lack of water-soluble groups in the matrix structure of organic pigments has strong hydrophobicity, and it is difficult to disperse uniformly in aqueous media. Various types of dispersants are used for surface modification, and then it is formed by strong pulverization. Only fine particles can be used for dyeing of textiles. [0003] Cationic ultra-fine pigments do not require pretreatment of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/03B01D39/08C02F1/00D06M101/04
CPCB01D39/08C02F1/001C02F2103/30D06M15/03D06M2101/04
Inventor 郝龙云王蕊房宽峻蔡玉青谭业强
Owner QINGDAO UNIV