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Organic-inorganic hybrid flocculant and preparation method thereof

A flocculant and hybrid technology, used in the field of water treatment, can solve the problems of water treatment equipment corrosiveness, difficulty in achieving flocculation effect, and no purification, and achieve excellent electrical neutralization ability, large and dense flocs, and applicable scope. wide effect

Active Publication Date: 2015-05-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent document CN103011359A discloses an inorganic-organic composite flocculant, the inorganic part of which is polyaluminum chloride and polyferric chloride, there must be a problem of synthesis rate in the preparation process, and at the same time, there is an alkali The influence of the degree of chemicalization on the polymerization of the two, and it has not been purified, it is difficult to achieve the ideal flocculation effect
In addition, in the process of drinking water treatment, the addition of iron salts is corrosive to the water treatment equipment, and the effluent has chromaticity.

Method used

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  • Organic-inorganic hybrid flocculant and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] In the first step, weigh 2 g of polyaluminium chloride, dissolve it in 100 ml of distilled water, place it in a four-neck flask, add 1.02 ml of monomer dimethyldiallyl aqueous solution with a mass fraction of 40%, and add a mass fraction of 10 mg / L at the same time 2.4ml of tetrasodium edetate.

[0023] In the second step, place the above-mentioned four-neck flask in a constant temperature water bath at 60°C, pass high-purity nitrogen gas for 30 minutes, slowly add 2.8ml of ammonium persulfate solution with a concentration of 1g / L, and continue to pass nitrogen gas for 5 hours. after the end.

[0024] In the third step, the obtained solution was dried in an oven to constant weight to obtain an organic-inorganic hybrid flocculant with a PAC content of 77%.

Embodiment 2

[0026] In the first step, weigh 2 g of polyaluminium chloride, dissolve it in 100 ml of distilled water, place it in a four-neck flask, add 1.33 ml of monomer dimethyldiallyl aqueous solution with a mass fraction of 40%, and add a mass fraction of 10 mg / L at the same time 3.2ml of tetrasodium edetate.

[0027] In the second step, place the above-mentioned four-neck flask in a constant temperature water bath at 70°C, pass high-purity nitrogen gas for 30 minutes, slowly add 2.8ml of ammonium persulfate solution with a concentration of 1g / L, and continue to pass nitrogen gas for 3 hours. after the end.

[0028] In the third step, the obtained solution was dried in an oven to constant weight to obtain an organic-inorganic hybrid flocculant with a PAC content of 71%.

Embodiment 3

[0030] In the first step, weigh 2 g of polyaluminium chloride, dissolve it in 100 ml of distilled water, place it in a four-neck flask, add 1.67 ml of monomeric dimethyldiallyl aqueous solution with a mass fraction of 40%, and simultaneously add a mass fraction of 10 mg / L 2.4ml of tetrasodium edetate.

[0031] In the second step, place the above-mentioned four-neck flask in a constant temperature water bath at 50°C, pass high-purity nitrogen gas for 30 minutes, slowly add 2ml of ammonium persulfate solution with a concentration of 1g / L, and continue to pass nitrogen gas, and react for 4 hours Finish.

[0032] In the third step, the obtained solution was dried in an oven to constant weight to obtain an organic-inorganic hybrid flocculant with a PAC content of 67%.

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Abstract

The invention discloses an organic-inorganic hybrid ionic bond efficient flocculant which is characterized in that an initiator, namely ammonium persulfate is added in a DMDAAC (dimethyl diallyl ammonium chloride) polymerization process to allow a molecular chain end of a composited polymer, namely PDMDAAC (poly dimethyl diallyl ammonium chloride) to be provided with sulfate radicals, the sulfate radicals are bonded with hydroxy aluminium ions with positive charge in an ionic bond form, and the PAC (poly aluminium chloride)-PDMDAAC organic-hybrid ionic bond efficient flocculant is obtained, and fully exerts excellent charge neutralizing capacity of PAC and an adsorption bridging action of PDMDAAC. In a water treatment process, the PAC-PDMDAAC hybrid flocculant is less in dosing quantity, and a formed flocculating body is quick in sedimentation, large and compact, so that the water treatment efficiency is improved significantly.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to an organic-inorganic hybrid flocculant and a preparation method thereof. Background technique [0002] Flocculation technology is an economical and simple water quality treatment method commonly used at home and abroad to improve the efficiency of water treatment. The flocculation process is also one of the key links in the entire water treatment. Therefore, efficient and safe flocculants play an irreplaceable role in the entire water treatment process. The flocculants currently used at home and abroad include inorganic flocculants and organic flocculants. [0003] Inorganic flocculants are mainly aluminum and polyferric flocculants. Inorganic flocculants have a series of advantages such as good coagulation effect, wide application range, strong electrical neutralization ability, and low cost. But there are also a series of problems at the same time, such as the toxicity of resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C08F126/02C08F2/44
Inventor 蒋绍阶向平李晓恩冯欣蕊盛贵尚张莹朱敬平王秉钧
Owner CHONGQING UNIV
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