Water-soluble organic copolymerized amphoteric polymeric flocculant and preparation method thereof

An amphoteric polymer and water-soluble technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of non-conformity with green chemistry and low storage stability, and achieve a product suitable for popularization and application, with obvious economic benefits and stable performance Effect

Inactive Publication Date: 2014-01-01
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007]2. The Mannich reaction requires the use of a large amount of organic solvents, which does not conform to the principles of green chemistry;
[0008]3. The polyacrylamide amphoteric polymer flocculant modified by Mannich reaction is not suitable for treating wastewater with high pH, ​​and its storage stability is not high;

Method used

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  • Water-soluble organic copolymerized amphoteric polymeric flocculant and preparation method thereof
  • Water-soluble organic copolymerized amphoteric polymeric flocculant and preparation method thereof
  • Water-soluble organic copolymerized amphoteric polymeric flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1. Add 15.7g of dimethyl diallyl ammonium halide, 0.006g of polymerization assistant sodium edetate and potassium fluoride into a 250mL four-necked reaction flask equipped with a thermometer, a nitrogen device and a stirrer The mixture and 9.5g of distilled water were stirred and dissolved, vacuumized twice, each time was 5 minutes, and nitrogen was passed once in the middle, and the time was 5 minutes;

[0052] Step 2. Dilute 2.7g of N-vinylpyrrolidone with 20g of distilled water and put it into the dropping funnel (a), dissolve 1.6g of itaconic acid (salt) with 20g of distilled water, add 0.3g of bifunctional monomer diacrylate and mix evenly into the drop liquid funnel (b);

[0053] Step 3, under the condition of continuous stirring and nitrogen flow, add 0.17g redox initiator potassium persulfate and potassium bisulfite mixture, the ratio of the amount of oxidizing agent to reducing agent is 1: 0.4, heat up to 40 ° C, Adjust the pH of the aqueous solution to 4...

Embodiment 2

[0056] Step 1, add 20g dimethyl diallyl ammonium halide, 0.008g polymerization assistant sodium edetate and potassium fluoride in the 250mL four-neck reaction flask equipped with thermometer, nitrogen device and stirrer The mixture and 14g of distilled water were stirred and dissolved, vacuumed twice, each time was 5 minutes, and nitrogen was passed once in the middle, and the time was 5 minutes;

[0057] Step 2. Dilute 3.6g of N-vinylpyrrolidone with 26g of distilled water and put it into the dropping funnel (a), dissolve 2.1g of itaconic acid (salt) with 26g of distilled water, add 0.4g of bifunctional monomer diacrylate and mix evenly into the drop liquid funnel (b);

[0058] Step 3, under the condition of continuous stirring and nitrogen flow, add 0.21g redox initiator potassium persulfate and potassium bisulfite mixture, the ratio of the amount of oxidizing agent to reducing agent is 1: 0.5, heat up to 40 ° C, Adjust the pH of the aqueous solution to 5, drop the aqueous ...

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Abstract

The invention discloses a water-soluble organic copolymerized amphoteric polymeric flocculant and a preparation method thereof. The water-soluble organic copolymerized amphoteric polymeric flocculant is a copolymer formed by copolymerizing three monomers, namely, dimethyl diallyl ammonium halide, vinyl pyrrolidone and itaconic acid (salt), with a bifunctional monomer diacrylate. A redox initiator, an inorganic peroxide initiator and a polymerizing auxiliary agent are simultaneously used in the preparation process; the conversion rate of the monomers is increased; the residual monomers are reduced; the flocculant is simply prepared and operated and can be directly used; and the prepared flocculant has the advantages of small dosage, large floc diameter, quick sedimentation, and the like.

Description

technical field [0001] The invention relates to a water-soluble organic copolymerized amphoteric polymer flocculant and a preparation method. Background technique [0002] Water is the basic material for human survival and social development. At present, the water environment in the world is facing the problems of water resource shortage, excessive consumption and serious pollution. The World Health Organization (WHO) survey shows that 80% of human diseases are related to unsafe water quality. China is a country with abundant water resources, but at the same time it is a country with severe water shortage, extremely low utilization rate of water resources and serious water pollution. These three factors seriously restrict people's normal life and sustainable economic development. Therefore, effective treatment and reuse of waste water (sewage) is an inevitable way to solve limited water resources to meet people's growing production and living needs. In the process of wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F226/02C08F226/10C08F222/02C08F222/14C08F222/20C08F4/40C08F4/30
Inventor 朱明张静秦丹丁瑶
Owner SICHUAN NORMAL UNIVERSITY
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