Printing and dyeing sewage decoloring flocculating agent based on visible light polymerization and preparation method thereof

A decolorizing flocculant, a technology for printing and dyeing sewage, applied in chemical instruments and methods, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. damage and other problems, to achieve the effects of energy saving, high salt tolerance, and short polymerization time

Active Publication Date: 2018-12-18
义乌市鹏之友新材料研究所有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, if the usual ultraviolet light polymerization technology is used, ozone will be generated, which will affect the environment and health, and will also

Method used

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  • Printing and dyeing sewage decoloring flocculating agent based on visible light polymerization and preparation method thereof
  • Printing and dyeing sewage decoloring flocculating agent based on visible light polymerization and preparation method thereof
  • Printing and dyeing sewage decoloring flocculating agent based on visible light polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0060] A method for preparing a dyeing wastewater decolorizing flocculant based on visible light polymerization includes the following steps:

[0061] 1) Dissolve the monomers AM, AE1, AE2 and AE3 in water according to the pre-designed proportions, add the pre-dissolved visible light sensitizing dye or pre-dissolved free radical initiator and visible light sensitizing dye, and transfer to the visible light photoreactor In the middle, nitrogen gas for 30-50min.

[0062] 2) Use an LED lamp matching the wavelength of the dye to irradiate for 20-40 minutes. After the temperature does not rise, keep irradiating for 20-40 seconds, the polymerization reaction is completed, and the colloid is obtained.

[0063] 3) Granulate the obtained colloid, dry it at 40~70℃, grind and siev the finished product.

[0064] Optionally, in step 1), the free radical initiator is a water-soluble azo compound, a modified benzophenone-based water-soluble initiator, or a supramolecular composed of a cyclodextrin a...

Example Embodiment

[0073] Example 1

[0074] (1) 720g (10.0mol, 40%) acrylamide, 1950g (10.0mol, 40%) acryloxyethyl trimethyl ammonium chloride, 1423g (5mol, 20%) acryloxyethyl dimethyl P-Methylbenzylammonium chloride, dissolve in 17 liters of deionized water, after it is completely dissolved, add 1.35g of initiator azobisisobutyl ether hydrochloride and 6.8g of squaric acid dye with the above code name SQ1. In a 20-liter photoreactor, let nitrogen gas flow at 25°C for 40 minutes, and then irradiate it with an LED light source with a wavelength of 650nm for 26 minutes. The thermometer shows a temperature of 43 degrees. After the irradiation continues for another 30 seconds, the temperature begins to drop and the light is stopped. Remove the colloid. Granulate with colloid granulator, the particle size is 3-8mm. Put it into an oven at 65°C, dry completely after three hours, grind and sieve, and obtain a cationic polymer flocculant powder product.

[0075] (2) Take 0.1g of the above cationic floccul...

Example Embodiment

[0076] Example 2

[0077] (1) 360g (5mol, 16.7%) acrylamide, 3100g (15mol, 50%) methacryloxyethyl trimethylammonium chloride, 2705g (10mol, 33.3%) acryloxyethyl di-p-benzyl Ammonium chloride, dissolved in 25 liters of deionized water, after it is completely dissolved, add 0.8 g of initiator BPQ and 1.80 g of the cycloalkane dye of the above code CP-1, and introduce it into a photoreactor with a volume of 30 liters. Blow nitrogen gas at 25°C for 40 minutes, and then irradiate it with an LED light source with a wavelength of 560nm for 22 minutes. The thermometer shows the temperature is 48 degrees. After 30 seconds of continuous irradiation, the temperature starts to drop. Stop the light and take out the colloid. Granulate with colloid granulator, the particle size is 3-8mm. Put it into an oven at 60°C, dry completely after three hours, grind and siev the powder to obtain a cationic polymer flocculant powder product.

[0078] (2) Take 0.1g of the above cationic flocculant powder pr...

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Abstract

The invention relates to the field of sewage processing, and discloses a printing and dyeing sewage decoloring flocculating agent based on visible light polymerization and a preparation method thereof. The flocculating agent is obtained by ternary or quaternary copolymerization, has good solubility and strong flocculation ability, has the ability to efficiently remove dyes in printing and dyeing sewage, and has high salt tolerance; The flocculating agent can be added as appropriate without re-dispersing of a flocculate. The method of the invention adopts visible light polymerization, the process does not cause ozone pollution, and the visible light selects LED irradiation matched with a sensitized dye wavelength, and energy consumption during a production process is saved; and the reactionprocess has the shorter polymerization time and higher efficiency than the existing polymerization process.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a printing and dyeing sewage decolorizing flocculant based on visible light polymerization and a preparation method thereof. Background technique [0002] Sewage from the printing and dyeing industry is relatively difficult to treat. It has a long treatment cycle, high cost, large amount of sludge, and serious odor emissions during the treatment process. It is difficult for the wastewater after biochemical treatment to meet the discharge standards. The reason is that most of the dyes are toxic to microorganisms, and most of the microorganisms die in the process of dyeing and become sludge. So far, no effective solution has been found. Therefore, it is an important issue to develop new functional materials that can effectively remove dyes in printing and dyeing wastewater. [0003] Although cationic polyacrylamide is an efficient flocculant, the cationic polyacrylamide so far has ...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F103/30C02F101/30
Inventor 吴飞鹏黄武宁
Owner 义乌市鹏之友新材料研究所有限公司
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