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Preparation method for hydrophobic associated amphoteric flocculant used for industrial wastewater treatment

An amphoteric flocculant, hydrophobic association technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unstable composition, small flocs, complex components, etc. Simple preparation method

Inactive Publication Date: 2020-05-01
安徽掌榕网科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although inorganic flocculants are cheap, the flocs formed by them are small, the treatment effect is unstable, and the range of application conditions is small; while organic synthetic flocculants have good product stability and good flocculation effect, but they have the problem of high synthesis cost. Moreover, the surface of particles in industrial wastewater usually has a negative charge, and the water contains a certain amount of toxic metal ions. The use of non-ionic, anionic and cationic polymer flocculants is limited to a certain extent.
Natural organic polymer flocculants have a wide range of sources, and have the characteristics of low price, many active groups, and non-toxicity. They have also been widely used in the field of water treatment. There may be problems such as deterioration and the use of a large amount of organic solvents in the production process

Method used

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  • Preparation method for hydrophobic associated amphoteric flocculant used for industrial wastewater treatment
  • Preparation method for hydrophobic associated amphoteric flocculant used for industrial wastewater treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A kind of preparation method of hydrophobic association type amphoteric flocculant for industrial waste water treatment is as follows:

[0029] Pulverize the montmorillonite with a pulverizer and pass through an 80-mesh sieve, then mix it with sulfuric acid with a mass concentration of 25%, the mass ratio of montmorillonite to sulfuric acid is 1:4, stir evenly at room temperature, let it stand for 5 hours, suction filter, filter After the cake was washed with deionized water until it was neutral, it was dried at 100°C for 8 hours, and then activated at 305°C for 10 hours to obtain modified montmorillonite; add dodecafluoroheptyl ethyl acrylate and OP-10 to the deionized In water, stir and dissolve to obtain a homogeneous solution, then add acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, itaconic acid, dimethyl diallyl ammonium chloride, stir at 300r / min for 12min and then Add triethylamine to adjust the pH of the system to neutral, add the above-mentioned modifie...

Embodiment 2

[0031] A kind of preparation method of hydrophobic association type amphoteric flocculant for industrial waste water treatment is as follows:

[0032] Crush the montmorillonite with a pulverizer and pass through an 80-mesh sieve, then mix it with sulfuric acid with a mass concentration of 35%, the mass ratio of montmorillonite to sulfuric acid is 1:2, stir evenly at room temperature, let stand for 5 hours, suction filter, filter After the cake was washed with deionized water until it was neutral, it was dried at 100°C for 8 hours, and then activated at 300°C for 11 hours to obtain modified montmorillonite; add dodecafluoroheptyl ethyl acrylate and OP-4 to the deionized In water, stir and dissolve to obtain a homogeneous solution, then add acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, itaconic acid, dimethyl diallyl ammonium chloride, stir at 250r / min for 12min and then Add triethylamine to adjust the pH of the system to neutral, add the above-mentioned modified montmo...

Embodiment 3

[0034] A kind of preparation method of hydrophobic association type amphoteric flocculant for industrial waste water treatment is as follows:

[0035] Pulverize the montmorillonite with a pulverizer and pass through an 80-mesh sieve, then mix it with sulfuric acid with a mass concentration of 32%. The cake was washed with deionized water to neutrality, dried at 100°C for 6h, and then activated at 300°C for 10h to obtain modified montmorillonite; add dodecafluoroheptyl ethyl acrylate and OP-7 to the deionized In water, stir to dissolve to obtain a homogeneous solution, then add acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, itaconic acid, dimethyl diallyl ammonium chloride, stir at 300r / min for 10min and then Add triethylamine to adjust the pH of the system to neutral, add the above-mentioned modified montmorillonite, stir at 900r / min for 2min, and then pass nitrogen for 60min to remove oxygen, and the nitrogen flow rate is 15cm 3 / min, then add potassium persulfate an...

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Abstract

The invention provides a preparation method for a hydrophobic associated amphoteric flocculant used for industrial wastewater treatment, and relates to the technical field of sewage treatment engineering. The preparation method comprises the following steps: preparing modified montmorillonite; adding dodecafluoroheptyl perfluorooctylethyl acrylate and an emulsifier into deionized water, then adding acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, itaconic acid and dimethyl diallyl ammonium chloride, adding triethylamine to adjust the pH value of a system to be neutral, introducing nitrogen to remove oxygen, then adding an initiator, carrying out a heat preservation reaction for 8-12 h, carrying out drying to remove water, carrying out grinding and crushing, adding an obtained powderinto an acetone / ethanol mixed solution, and carrying out heating reflux purification for 10-15 h so as to obtain a mixed powder; and dispersing nanometer silicon dioxide with a proper amount of anhydrous butanone, then adding dispersed nanometer silicon dioxide into a polyacrylate emulsion, carrying out high-speed shearing dispersion, adding the above-mentioned mixed powder, carrying out drying ata temperature of 120-130 DEG C, and immersing an obtained material into an isopropanol solution of fluorosilane for 40-50 min. The hydrophobic associated amphoteric flocculant provided by the invention has good adsorption effect on dyes and heavy metal elements in industrial wastewater and can be used for treating the industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage treatment engineering, in particular to a preparation method of a hydrophobic association type amphoteric flocculant for industrial wastewater treatment. Background technique [0002] Industrial wastewater includes production wastewater, production sewage and cooling water. It refers to wastewater and waste liquid produced in the process of industrial production, which contains industrial production materials, intermediate products, by-products and pollutants produced in the production process lost with water. There are many types of industrial wastewater with complex components. For example, electrolytic salt industrial wastewater contains mercury, heavy metal smelting industrial wastewater contains various metals such as lead and cadmium, electroplating industrial wastewater contains various heavy metals such as cyanide and chromium, petroleum refining industrial wastewater contains phenol, and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/52
Inventor 吴宪
Owner 安徽掌榕网科技有限公司
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