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Synthetic process of polymeric ferric sulfate flocculant

A technology for polymerizing ferric sulfate and synthesis process, which is applied in the fields of ferric sulfate, flocculation/sedimentation water/sewage treatment, chemical instruments and methods, etc. It can solve the problems of reducing the purity of polymerized ferric sulfate flocculants, and achieve excellent treatment effect and scope of application. Wide and less corrosive effect

Inactive Publication Date: 2020-08-04
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the direct oxidation process has become more and more mature, the biggest defect of this method is that Fe(OH) is easily formed under alkaline conditions after the ferrous ion is oxidized to ferric iron. 3 Precipitation, resulting in a decrease in the purity of the final polymeric ferric sulfate flocculant

Method used

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  • Synthetic process of polymeric ferric sulfate flocculant
  • Synthetic process of polymeric ferric sulfate flocculant

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Use the process of the present invention to prepare polymeric ferric sulfate flocculant:

[0032] (1) Use the "four-chamber" structure of the electrodialysis membrane stack to process the saturated solutions of ferrous sulfate and potassium chlorate. The two desalination chambers are added with ferrous sulfate solution and potassium chlorate solution, and the concentration chamber is filled with deionized water. When the voltage starts to rise, the reaction is completed for about 30 minutes to prepare high-concentration Fe 2+ With ClO 3 - The volume ratio of ferrous sulfate saturated solution, potassium chlorate saturated solution and deionized water is 1:1:1.

[0033] (2) Add the solution prepared in step (1) to the salt chamber of the bipolar membrane electrodialysis membrane stack. The initial solutions of the acid chamber and the alkali chamber are deionized water, and the bipolar membrane electrodialysis electrode solution is 3% by mass. Na 2 SO 4 The solution, the thre...

Embodiment 2

[0036] Use the process of the present invention to prepare polymeric ferric sulfate flocculant:

[0037] (1) Use the "four-chamber" structure of the electrodialysis membrane stack to process the saturated solutions of ferrous sulfate and potassium chlorate. The two desalination chambers are added with ferrous sulfate solution and potassium chlorate solution, and the concentration chamber is filled with deionized water. When the voltage starts to rise, the reaction is completed for about 30 minutes to prepare high-concentration Fe 2+ With ClO 3 - The volume ratio of ferrous sulfate saturated solution, potassium chlorate saturated solution and deionized water is 1:1:1.

[0038] (2) Add the solution prepared in step (1) to the salt chamber of the bipolar membrane electrodialysis membrane stack. The initial solutions of the acid chamber and the alkali chamber are deionized water, and the bipolar membrane electrodialysis electrode solution is 3% by mass. Na 2 SO 4 The solution, the thre...

Embodiment 3

[0041] Use the process of the present invention to prepare polymeric ferric sulfate flocculant:

[0042] (1) Use the "four-chamber" structure of the electrodialysis membrane stack to process the saturated solutions of ferrous sulfate and potassium chlorate. The two desalination chambers are added with ferrous sulfate solution and potassium chlorate solution, and the concentration chamber is filled with deionized water. When the voltage starts to rise, the reaction is completed for about 30 minutes to prepare high-concentration Fe 2+ With ClO 3 - The volume ratio of ferrous sulfate saturated solution, potassium chlorate saturated solution and deionized water is 1:1:1.

[0043] (2) Add the solution prepared in step (1) to the salt chamber of the bipolar membrane electrodialysis membrane stack. The initial solutions of the acid chamber and the alkali chamber are deionized water, and the bipolar membrane electrodialysis electrode solution is 3% by mass. Na 2 SO 4 The solution, the thre...

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Abstract

The invention belongs to the technical field of inorganic polymer material processing, and particularly relates to a synthetic process of a polymeric ferric sulfate flocculant. Potassium chlorate andferrous sulfate are used as raw materials, electrodialysis and bipolar film electrodialysis are combined to prepare the polymeric ferric sulfate flocculating agent, firstly, a high-concentration ClO3<-> and Fe < 3 + > mixed solution is prepared through the concentration effect of electrodialysis, and then H < + > and OH <-> generated by water splitting of a bipolar film under the effect of an electric field are used for participating in an oxidation reaction and a hydrolysis reaction of ferrous ions. According to the method, the speeds of the oxidation reaction and the hydrolysis reaction arebalanced, the concentrations of the ferrous ions and chlorate ions in the product are reduced, the alkalinity and the purity of the product are improved, and the product with a better turbidity removal rate and a wider application range is obtained.

Description

Technical field [0001] The invention belongs to the technical field of inorganic polymer material processing, and specifically relates to a synthesis process of a polymeric ferric sulfate flocculant. Background technique [0002] Inorganic polymer flocculant is a new type of water treatment agent developed on the basis of traditional aluminum salt and iron salt flocculants. Traditional aluminum salt and iron salt flocculants have a long history of use, but there are many problems in the water treatment process, which gave birth to inorganic polymer flocculants with better flocculation effects. In the pretreatment of industrial wastewater, polyaluminum flocculants and polyiron flocculants are often used. The use of polyaluminum flocculants will cause secondary damage to the environment, affect human health, and induce Alzheimer's disease. Polyferric flocculants mainly include aggregate ferric chloride flocculants and polyferric sulfate flocculants. Due to the strong corrosiveness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C01G49/14
CPCC02F1/5236C01G49/14
Inventor 李少香王栋孟文巧雷云娜王国慧张猛程家骥曲文娟
Owner QINGDAO UNIV OF SCI & TECH
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