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Preparation method of low-viscosity, instant and efficient flocculation decolorizer

A technology of decolorizing agent and flocculation, which is applied in the field of flocculation and decolorizing agent for wastewater treatment, and can solve the problems of long water treatment time

Active Publication Date: 2019-11-12
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the problem with the existing flocculation decolorizers is that the series of processes of formation, growth and settlement of flocculation sediment make the water treatment time too lengthy

Method used

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  • Preparation method of low-viscosity, instant and efficient flocculation decolorizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The first step is to weigh a certain mass of polyacrylamide solid with a relative molecular mass of 12 million and thiourea with a mass ratio of 1% relative to the polyacrylamide, and stir and dissolve it in acetic acid at pH=3.5 at a temperature of 20°C— In sodium acetate buffered aqueous solution, an aqueous solution (called raw material I) with a mass fraction of 1‰ is formed;

[0025] In the second step, a hydrogen-bonding polycation solution such as dicyandiamide-diethylenetriamine polycondensate or dicyandiamide-formaldehyde polycondensate is taken by weighing a certain mass solid content of 45%, and is added relative to pure dicyandiamide-diethylenetriamine polycation solution. Ethylenetriamine polycondensate or dicyandiamide-formaldehyde polycondensate is tetradecyldimethylamine-acetate with a mass ratio of 1‰, dissolved and mixed evenly, and set aside (as raw material II);

[0026]In the third step, according to the molar ratio of 1:1, a certain amount of betai...

Embodiment 2

[0031] The first step is to weigh a certain mass of polyacrylamide solid with a relative molecular mass of 16 million and thiourea with a mass ratio of 3% relative to the polyacrylamide, and stir and dissolve in acetic acid with pH=4.0 at a temperature of 30°C— In the sodium acetate buffered aqueous solution, an aqueous solution (called raw material I) with a mass fraction of 3‰ is formed;

[0032] In the second step, a hydrogen-bonding polycation solution such as dicyandiamide-diethylenetriamine polycondensate or dicyandiamide-formaldehyde polycondensate with a certain mass solid content of 50% is weighed, and added relative to pure dicyandiamide-diethylenetriamine Ethylenetriamine polycondensate or dicyandiamide-formaldehyde polycondensate is tetradecyldimethylamine-acetate with a mass ratio of 2‰, dissolved and mixed evenly, and set aside (as raw material II);

[0033] In the third step, according to the molar ratio of 1:1, a certain amount of betaine and triethanolamine we...

Embodiment 3

[0038] The first step is to weigh a certain mass of polyacrylamide solid with a relative molecular mass of 18 million and thiourea with a mass ratio of 5% relative to the polyacrylamide, and stir and dissolve in acetic acid with pH=4.5 at a temperature of 40°C— In the sodium acetate buffered aqueous solution, an aqueous solution (called raw material I) with a mass fraction of 5‰ is formed;

[0039] In the second step, a hydrogen-bonding polycation solution such as dicyandiamide-diethylenetriamine polycondensate or dicyandiamide-formaldehyde polycondensate that has a certain mass solid content of 55% is weighed, and is added relative to pure dicyandiamide-diethylenetriamine polycation solution. Ethylene triamine polycondensate or dicyandiamide formaldehyde polycondensate mass ratio of tetradecyl dimethylamine-acetate is 3‰, dissolved and mixed evenly, standby (as raw material II);

[0040] In the third step, according to the molar ratio of 1:1, a certain amount of betaine and t...

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Abstract

The invention discloses a preparation method of a low-viscosity, instant and efficient flocculation decolorizer. According to the preparation method, a novel kind of hydrogen bond control 'switch' rawmaterial is introduced into a decolorizer system, the raw material namely is a ternary complex of acetic acid-triethanolamine-glycine betaine, and thus the flocculation decolorizer is low-viscosity,instant and rapid-decolorization. The final pH value of the flocculation decolorizer solution system is 4.0+ / -0.5, the apparent viscosity is 2.3-4.6 cps, water is approached, the flocculation decolorizer can be dissolved in the water immediately, and decolored with dyes in the water in time. At the same time, the flocculation decolorizer further has the fast decolorization characteristic of turning the colored printing and dyeing wastewater into pure within 10 s, the purification and decolorization performance is better than that of the same kind of products sold in the market, the preparationprocess is simple and convenient, the condition is mild, the application performance is stable, and good application prospects are achieved.

Description

technical field [0001] The invention relates to a preparation method of a low-viscosity, instant and high-efficiency flocculation decolorant, in particular to a preparation method of a flocculation decolorant based on hydrogen bond "switch" control, and specifically belongs to the technical field of flocculation decolorant for wastewater treatment. Background technique [0002] The textile industry is a traditional pillar industry of my country's national economy and an important livelihood industry, as well as an industry with obvious international competitive advantages. In order to meet people's needs for different colors of textile fabrics, it is necessary to dye them; but when dyeing, especially when dyeing deep and thick colors, due to the insufficient dyeing rate, some dyes cannot be fixed on the fabric, resulting in raw materials waste, which in turn leads to the generation of a large amount of colored wastewater. First of all, printing and dyeing wastewater has a l...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/54
CPCC02F1/56C02F1/54
Inventor 余义开李红艳白钰
Owner JIANGXI NORMAL UNIV