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Inorganic-organic composite polymer water treatment defluorination flocculant and preparation method thereof

A composite polymer, water treatment technology, applied in water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, chemical instruments and methods, etc. It can achieve the effect of obvious fluorine removal effect, diverse structure and high fluorine removal rate.

Pending Publication Date: 2022-01-21
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it is just a physical compound of different substances, the synergistic effect between the components is weak, and the solubility of the agent is poor, and the activated alumina and carbon-based apatite are insoluble, and the simple adsorption effect is poor, and the cost is low. high
Polyaluminum chloride, polyaluminum sulfate, and polyferric sulfate are mixed to precipitate a large amount of suspended sediment, which reduces the efficacy of the drug and has poor practical applicability

Method used

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  • Inorganic-organic composite polymer water treatment defluorination flocculant and preparation method thereof
  • Inorganic-organic composite polymer water treatment defluorination flocculant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] According to the following steps to prepare the defluorinated flocculant-1, the specific steps are as follows:

[0033] Step 1: Weigh a fixed amount of sodium silicate and dissolve it in quantitative water to obtain a sodium silicate solution with a mass concentration of 5%. Put the sodium silicate solution in a constant temperature water bath, set the constant temperature at 50°C, and stir rapidly for 20 minutes , a colorless transparent solution was obtained, acidified to pH=2.0 by adding dilute hydrochloric acid with a concentration of 1 mol / L, stirred and reacted for 60 min, and solution A was obtained after the reaction was completed.

[0034]Step 2: Weigh a fixed amount of aluminum chloride hexahydrate solid and ferric chloride hexahydrate solid, with a mass ratio of Al / Fe=15:1, dissolve them in an appropriate amount of distilled water, and maintain a mass concentration of about 30%. Slowly add solution A while stirring to ensure that the mass ratio (Al+Fe) / Si=15:...

Embodiment 2

[0038] Prepare the fluorine-removing flocculant-2 according to the following steps, the specific steps are as follows:

[0039] Step 1: Weigh a fixed amount of sodium silicate and dissolve it in quantitative water to obtain a sodium silicate solution with a mass concentration of 5%. Put the sodium silicate solution in a constant temperature water bath, set the constant temperature at 50°C, and stir rapidly for 20 minutes , to obtain a colorless transparent solution, adding dilute hydrochloric acid with a concentration of 1 mol / L to acidify to pH=2.5, stirring and reacting for 60 min, and obtaining solution A after the reaction.

[0040] Step 2: Weigh a fixed amount of aluminum chloride hexahydrate solid and ferric chloride hexahydrate solid, and the mass ratio is Al / Fe=10:1. Dissolve in an appropriate amount of distilled water, and maintain a mass concentration of about 30%. After all of the solution is dissolved, slowly add solution A under constant stirring to ensure that th...

Embodiment 3

[0044] Prepare the fluorine-removing flocculant-3 according to the following steps, the specific steps are as follows:

[0045] Step 1: Weigh a fixed amount of sodium silicate and dissolve it in quantitative water to obtain a sodium silicate solution with a mass concentration of 5%. Put the sodium silicate solution in a constant temperature water bath, set the constant temperature at 50°C, and stir rapidly for 20 minutes , to obtain a colorless transparent solution, adding dilute hydrochloric acid with a concentration of 1mol / L to acidify to pH=2.3, stirring and reacting for 60min, and obtaining solution A after the reaction.

[0046] Step 2: Weigh a fixed amount of aluminum chloride hexahydrate solid and ferric chloride hexahydrate solid, with a mass ratio of Al / Fe=20:1. Dissolve in an appropriate amount of distilled water, and maintain a mass concentration of about 30%. After all of the solution is dissolved, slowly add solution A under constant stirring to ensure that the m...

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Abstract

The invention discloses a preparation method of an inorganic-organic composite polymer water treatment defluorination flocculant, which is characterized by comprising the following steps of (1) stirring a sodium silicate solution at a constant temperature to obtain a colorless transparent solution, then adding diluted hydrochloric acid for acidification, and stirring to obtain a solution A, (2) dissolving aluminum chloride hexahydrate and ferric chloride hexahydrate in distilled water, adding the solution A while stirring, then adding sodium carbonate, and stirring to obtain a solution B, (3) dissolving modified chitosan, poly dimethyl diallyl ammonium chloride and sodium hydrogen sulfite in distilled water, adjusting the pH value with diluted hydrochloric acid, and stirring to obtain a solution C, and (4) adding the solution B into the solution C, and stirring for reaction to prepare the defluorination flocculant solution. When the flocculant disclosed by the invention is used for treating the fluorine-containing wastewater, the fluorine content in the effluent can reach the class III first-grade discharge standard of national Environmental Quality Standard for Surface Water (GB3838-2002), the fluorine removal rate is high, the fluorine removal effect is obvious, and deep treatment of the fluorine-containing wastewater can be realized.

Description

technical field [0001] The invention belongs to the technical field of fluorine-containing wastewater treatment, and in particular relates to an inorganic-organic composite polymer water treatment fluorine-removing flocculant and a preparation method thereof. Background technique [0002] Fluoride is an indispensable raw material for the production of many chemical products. It is widely used in iron and steel smelting, coal chemical industry, electroplating and other industries. During the production and processing of aluminum molds and fertilizers, a large amount of fluorine-containing wastewater is often produced. For high-concentration fluoride-containing wastewater, multi-stage treatment is required to meet the national GB 8978-1996 "Comprehensive Discharge Standard for Sewage" which requires the concentration of fluoride to be less than 10 mg / L. National GB 5749-2006 "Drinking Water Sanitation Standard" requires that the concentration of fluoride should be lower than 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F101/14
CPCC02F1/56C02F2101/14
Inventor 郑博英张亮亮石伟杰张襄崔秀菊王孟梅康杏芳柯建怡
Owner 神美科技有限公司
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