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Magnetic flocculant for treating high-turbidity polluted water and preparation method thereof

A magnetic flocculant, a technology for polluting water, used in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Poor sewage treatment capacity, etc., to achieve strong flocculation capacity, reduce investment and operation costs, and achieve good results

Inactive Publication Date: 2020-12-29
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the current widely used magnetic flocculant for sewage treatment, the magnetic material mixed with simple physics cannot be tightly combined with the flocculation components, resulting in poor flocculation effect and poor sewage treatment capacity. The present invention proposes a high turbidity treatment A magnetic flocculant for polluted water and a preparation method thereof, thereby effectively improving the bonding strength of the magnetic species and the flocculant, and the process is simple, the cost is low, and it is suitable for popularization and application

Method used

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  • Magnetic flocculant for treating high-turbidity polluted water and preparation method thereof
  • Magnetic flocculant for treating high-turbidity polluted water and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] The preparation process is:

[0033] (1) Add anhydrous aluminum trichloride to deionized water and mix evenly to prepare an aqueous solution of aluminum trichloride, then add sodium hydroxide solution with a mass concentration of 15% drop by drop, control the pH value to 8.0, and heat and stir at 80°C Reaction, made aluminum hydroxide colloid; Wherein, 7 weight parts of anhydrous aluminum trichloride, 47 weight parts of deionized water;

[0034] (2) Add the aluminum hydroxide colloid and silane coupling agent prepared in step (1) into the reaction kettle, heat and stir evenly, then add acrylamide and iron ferric oxide nano-magnetic particles, mix well, and then Add potassium persulfate dropwise, continue to stir and react, and collect the product; the silane coupling agent is γ-aminopropyltriethoxysilane; the heating and stirring temperature is 56°C, the stirring speed is 580r / min, and the reaction time is 1.5h; the time for continuing to stir the reaction is 3h; where...

Embodiment 2

[0037] The preparation process is:

[0038](1) Add anhydrous aluminum trichloride to deionized water and mix evenly to prepare aluminum trichloride aqueous solution, then add sodium hydroxide solution with a mass concentration of 15% drop by drop, control the pH value to 8.5, and heat to promote colloid formation, , made aluminum hydroxide colloid; Wherein, 5 parts by weight of anhydrous aluminum trichloride, 55 parts by weight of deionized water;

[0039] (2) Add the aluminum hydroxide colloid and silane coupling agent prepared in step (1) into the reaction kettle, heat and stir evenly, then add acrylamide and iron ferric oxide nano-magnetic particles, mix well, and then Add potassium persulfate dropwise, continue to stir and react, and collect the product; the silane coupling agent is γ-glycidyl etheroxypropyltrimethoxysilane; the temperature of heating and stirring is 50°C, and the stirring speed is 550r / min. The reaction time is 2h; the time for continuing to stir the rea...

Embodiment 3

[0042] The preparation process is:

[0043] (1) Add anhydrous aluminum trichloride to deionized water and mix evenly to prepare an aqueous solution of aluminum trichloride, then add sodium hydroxide solution with a mass concentration of 15% drop by drop, control the pH value to 8.5, heat to 80°C and stir Promoting the formation of colloids to produce aluminum hydroxide colloids; wherein, 6 parts by weight of anhydrous aluminum trichloride and 52 parts by weight of deionized water;

[0044] (2) Add the aluminum hydroxide colloid and silane coupling agent prepared in step (1) into the reaction kettle, heat and stir evenly, then add acrylamide and iron ferric oxide nano-magnetic particles, mix well, and then Add potassium persulfate drop by drop, continue to stir and react, and collect the product; the silane coupling agent is γ-(methacryloyloxy)propyltrimethoxysilane; the temperature of heating and stirring is 52°C, and the stirring speed is 560r / min, the reaction time is 2h; ...

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Abstract

The invention provides a magnetic flocculant for treating high-turbidity polluted water and a preparation method thereof. The preparation method comprises the following steps: adding a sodium hydroxide solution into an aluminum trichloride aqueous solution, controlling the pH value to prepare an aluminum hydroxide colloid, adding the colloid and a silane coupling agent into a reaction kettle, heating and stirring, adding acrylamide, ferroferric oxide nano magnetic particles and potassium persulfate, dehydrating and drying a product obtained by reaction to generate a rubber block, and finally grinding and sieving, to obtain the magnetic flocculant for treating high-turbidity polluted water. According to the method, tight combination of magnetic substances and flocculation components is achieved through covalent bond action, the obtained magnetic flocculant is high in flocculation capacity and good in sewage treatment effect, the preparation process is simple and easy to implement, rapidseparation can be achieved under the action of an external magnetic field after the prepared magnetic flocculant acts on pollutants in water, and the precipitation time is saved. Therefore, the volume of the sedimentation tank or the air floatation tank is reduced, the occupied area of equipment is reduced and the investment operation cost is reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to the preparation of a sewage treatment flocculant, in particular to a magnetic flocculant for treating high turbidity polluted water and a preparation method thereof. Background technique [0002] Water resources are the most important resources for human survival, and good water quality is a necessary condition for human survival and social development. The wastewater produced in the industrial production process usually has complex components and will cause serious pollution to the environment. Therefore, it must be treated to meet the standard before it can be discharged or recycled. In water pollution control, the flocculation process is an indispensable and important link in various water treatment and purification processes, and it is also the most widely used and most common unit treatment process. [0003] However, for sewage with high turbidity, the consumption of floccul...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C08F120/56C08F2/44
CPCC02F1/5236C02F1/545C02F1/56C08F2/44C08F120/56
Inventor 陈庆司文彬曾军堂何方李钧
Owner CHENDU NEW KELI CHEM SCI CO LTD
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