Fluoride-modified hydrophobic ampholytic organic macromolecular flocculant and preparation and application thereof

An organic polymer, fluoride technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of increasing the cost of sludge, and achieve the effect of reducing hydrophilicity, improving adsorption capacity, and improving the effect of flocculation treatment.

Inactive Publication Date: 2019-04-05
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current flocculant method will produce a large amount of sludge with high water content, which will increase the cost of sludge transportation and treatment. Therefore, it is necessary to develop new flocculants to replace traditional flocculants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a fluoride-modified hydrophobic amphoteric polyacrylamide flocculant by introducing a hydrophobic group and adopting an aqueous solution polymerization method to prepare a hydrophobic amphoteric polyacrylamide flocculant to reduce the hydrophilicity of the organic polymer flocculant properties, follow the steps below:

[0030] (1) First, under 60°C and magnetic stirring, the monomer dimethyl diallyl ammonium chloride, acrylamide, and fumaric acid with a total mass fraction of 15% are mixed in a molar ratio of 1:4: 24 and 0.7% fluoride were placed in a four-necked flask, the pH was adjusted to be 7, and after vacuuming, nitrogen was introduced;

[0031] (2) Secondly, after stirring and mixing nitrogen and oxygen removal for 30 minutes, add 0.3% hydrophobic group butyl acrylate and 0.5% initiator K 2 S 2 o 8 , polymerize and keep warm for 12 hours, cool and purify, dry and grind to obtain a fluoride-modified hydrophobic amphoteric organic polymer...

Embodiment 2

[0033] A preparation method of a fluoride-modified hydrophobic amphoteric organic polymer flocculant, similar to Example 1, as follows:

[0034] (1) First, under 30°C and magnetic stirring, the monomer dimethyl diallyl ammonium chloride, acrylamide, and fumaric acid with a total mass fraction of 20% are mixed in a molar ratio of 1:4: 24 and 0.7% fluoride were placed in a four-necked flask, and the pH was adjusted to be 5. After vacuuming, nitrogen was introduced;

[0035] (2) Secondly, after stirring and mixing nitrogen and oxygen removal for 30 minutes, add 0.3% hydrophobic group butyl acrylate and 0.5% initiator K 2 S 2 o 8 , polymerize and keep warm for 12 hours, cool and purify, dry and grind to obtain a fluoride-modified hydrophobic amphoteric organic polymer polyacrylamide product. The prepared fluoride-modified hydrophobic amphoteric organic polymer polyacrylamide flocculant has a removal rate of 79.6% for SS in printing and dyeing wastewater, and a moisture content ...

Embodiment 3

[0037] A preparation method of a fluoride-modified hydrophobic amphoteric organic polymer flocculant, similar to Example 1, as follows:

[0038] (1) First, under 60°C and magnetic stirring, the monomer dimethyl diallyl ammonium chloride, acrylamide, and fumaric acid with a total mass fraction of 25% are mixed in a molar ratio of 1:4: 24 and 0.7% fluoride were placed in a four-necked flask, the pH was adjusted to be 7, and after vacuuming, nitrogen was introduced;

[0039] (2) Secondly, after stirring and mixing nitrogen and deoxygenation for 30 minutes, add 0.3% hydrophobic group butyl acrylate and 0.3% initiator K 2 S 2 o 8 -Na 2 S 2 o 3 , polymerize and keep warm for 12 hours, cool and purify, dry and grind to obtain a fluoride-modified hydrophobic amphoteric organic polymer polyacrylamide product. The prepared fluoride-modified hydrophobic amphoteric organic polymer polyacrylamide flocculant has a removal rate of 74.1% of SS in printing and dyeing wastewater, and a mo...

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PUM

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Abstract

The invention relates to a fluoride-modified hydrophobic ampholytic organic macromolecular flocculant and a preparation method and application thereof. Hydrophobic groups are introduced to prepare thehydrophobic ampholytic polyacrylamide flocculant by means of solution polymerization; hydrophilicity of an organic macromolecular flocculant is reduced; the ability to adsorb and flocculate suspendedparticles in wastewater is improved; water content of sludge is reduced; the demand for sludge dewatering is met. The flocculant of hydrophobic ampholytic type herein contains the hydrophobic groups,has the characteristics of cationic and anionic groups, and is more widely applicable; electrical neutralization and adsorbing bride action helps effectively shorten the flocculent settling time; coagulative settling effect is outstanding; the water content of flocculated sludge is reduced to maximum extent; the burden of subsequent treatment process is reduced; the flocculant herein has very practical application value in the pretreatment of industrial wastewater and supplied and drained water.

Description

technical field [0001] The invention relates to a preparation method of a fluoride-modified hydrophobic amphoteric organic polymer flocculant and its product and application, which can effectively reduce the hydrophilicity of the flocculant, improve the flocculation effect, reduce the moisture content of sludge, and be used for Water pollution pretreatment field. Background technique [0002] Coagulation-sedimentation method is a physical and chemical method widely used in water treatment, easy to operate and low in treatment cost. In water supply and drainage or wastewater treatment, flocculation is one of the important operations and has an important impact on the whole process. Pretreatment of industrial wastewater by physical and chemical methods such as flocculation and sedimentation can effectively remove suspended particles in wastewater and reduce COD and NH in wastewater 3 -N, heavy metal ions and chromaticity, etc., improve the biodegradability of wastewater. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/02C08F220/56C08F226/02C08F220/18C02F1/56
CPCC02F1/56C08F222/02C08F220/56C08F226/02C08F220/1804
Inventor 何丹农童琴赵昆峰阳靖峰金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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