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High-efficiency defluorination agent and application thereof in industrial waste water

A defluoridation agent, high-efficiency technology, applied in the field of water treatment, can solve the problems of uneconomical and operable, unsatisfactory, high operation management experience, etc., to meet the needs of subsequent drying and landfill Effect

Inactive Publication Date: 2019-06-14
上海万狮环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ion exchange method is suitable for small water volume and low concentration wastewater, but it has no advantages in terms of treatment cost and operating efficiency when dealing with large water volume and high concentration fluorine-containing wastewater; membrane methods such as nanofiltration, reverse osmosis, electrodialysis, etc. Innovative technology, although the treatment effect is better, but the cost is high, and at the same time requires high operation and management experience, problems may often occur during operation, and the biggest problem is that the concentrated water also needs to be treated; the adsorption method uses high Specific surface area adsorbents such as activated carbon, clay, etc., are only suitable for low-concentration fluorine-containing wastewater, and are not economical and operable for large-volume and high-concentration wastewater; The effects of salt, iron salt and silicic acid hydrogel are not satisfactory, and the water output is not stable when the dosage is large

Method used

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  • High-efficiency defluorination agent and application thereof in industrial waste water
  • High-efficiency defluorination agent and application thereof in industrial waste water
  • High-efficiency defluorination agent and application thereof in industrial waste water

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0042] Production end double-bond ethylenediamine core low algebra dendrimers under different feed ratios:

[0043] Get 7 four-necked flasks, weigh 118.40 g, 124.32 g, 133.20 g, 139.12 g, 148.00 g, 162.8 g, 177.6 g, 207.2 g of methanol and add in the round bottom flask with stirring, reflux condenser and thermometer, control The reaction temperature is 25°C, under nitrogen protection and stirring conditions, first add an equal amount of trimethylolpropane triacrylate, and then dropwise add 12 g of ethylenediamine methanol solution (50%). After dropping, control the reaction temperature at 25°C and react for 24 hours, then a light amber viscous product will precipitate out, use a separatory funnel to separate the product from methanol, wash with methanol, and dry in vacuo to obtain a low algebra core of double-bonded ethylenediamine Dendrimer;

specific Embodiment 2

[0044] Production of terminal double bond ethylenediamine core low algebra dendrimers at different reaction times:

[0045] Take 4 four-necked flasks, weigh 133.20 g of methanol and add them to the round bottom flasks with stirring, reflux condenser and thermometer, control the reaction temperature at 25 ° C, and add the same amount of trimethylol respectively under nitrogen protection and stirring conditions propane triacrylate, and then dropwise added 12 g methanol solution of ethylenediamine (50%). After dropping, control the reaction temperature at 25°C, set the reaction time at 12h, 18h, 30h, and 36h respectively, and then a light amber viscous product will precipitate out. Use a separatory funnel to separate the product from methanol, wash with methanol, and dry in vacuo. The end double bond ethylenediamine core low algebra dendrimers are obtained.

specific Embodiment 3

[0046] Production of terminal double bond ethylenediamine core low algebra dendrimers at different reaction temperatures:

[0047] Get 3 four-necked flasks, take by weighing 133.20 g methanol and add in the round-bottomed flasks with stirring, reflux condenser and thermometer, under nitrogen protection and stirring conditions, add an equivalent amount of trimethylolpropane triacrylate respectively, Then 12 g of methanol solution (50%) of ethylenediamine was added dropwise. After dropping, the temperature was set at 30°C, 35°C, and 45°C, and the color change was observed during the reaction.

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Abstract

The invention relates to a high-efficiency defluorination agent and application thereof in industrial waste water. The chemical agent is a composite reagent of organic polymer cationic polymer and nano ferric silicate polymer; the content of the nano ferric silicate polymer in a compound coagulant (WS-F-803 #) is 5%-30%, and the content of the organic polymer cationic polymer in the compound coagulant (WS-F-803 #) is 3%-10%. The chemical agent can reduce fluorine ions in various fluorine-containing industrial waste water to less than 1 mg / L.

Description

technical field [0001] The present invention relates to the field of water treatment, involving phosphate fertilizer plants, fluorine-related chemical products (such as hydrofluoric acid, sodium fluoride, etc.) production enterprises, brick / ceramic / glass production enterprises, fluorine-containing pesticide enterprises, coal chemical industry, coking industry The removal of fluoride ions in sewage in other industries, specifically a high-efficiency defluoridation agent and its application in industrial wastewater. Background technique [0002] Fluorine is the most electronegative and reactive element in the periodic table of elements. It is precisely because of its high reactivity that fluorine cannot exist in the form of simple substances in nature. Fluorine exists mainly in the form of inorganic fluorine (such as fluorine-containing minerals, free fluorine ions, etc.) and organic fluorine (such as Freon, etc.) in nature. In the earth's geological environment, inorganic ...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F101/14
Inventor 李风亭赵黄浦袁霄李杰周维啸
Owner 上海万狮环保科技有限公司
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