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Water-soluble organic amphoteric copolymeric flocculant and preparation method thereof

A copolymer, water-soluble technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of non-compliance with green chemistry, low storage stability, etc., and achieve the effect of being suitable for popularization and application, obvious economic benefits, and reducing residues

Inactive Publication Date: 2012-10-03
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. 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 amphoteric copolymeric flocculant and preparation method thereof
  • Water-soluble organic amphoteric copolymeric flocculant and preparation method thereof
  • Water-soluble organic amphoteric copolymeric flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1. Add 3g of N,N-dimethylaminoethyl acrylate, 0.006g of polymerization assistant sodium edetate and fluorine to a 250mL four-necked reaction flask equipped with a thermometer, a nitrogen device and a stirrer. Stir the mixture of potassium chloride and 16g of distilled water to dissolve, vacuumize twice for 5 minutes each time, and pass nitrogen once in the middle for 5 minutes;

[0052] Step 2. Add 1g of bifunctional monomer diacrylate to 16g of acryloyloxyethyltrimethylammonium halide, dilute with 4g of distilled water and mix evenly, put it into the dropping funnel (a), and dissolve 2g of 2-acrylamide- with 12g of distilled water 2-Methylpropanesulfonic acid (salt) is loaded into the dropping funnel (b);

[0053] Step 3, under the condition of continuous stirring and nitrogen, add the mixture of 0.17g redox initiator potassium persulfate and sodium bisulfite at one time, the ratio of the amount of oxidizing agent to reducing agent is 1: 0.5, and the temperature i...

Embodiment 2

[0056] Step 1. Add 6g of N,N-dimethylaminoethyl acrylate, 0.045g of polymerization assistant sodium ethylenediaminetetraacetate and fluorine to a 250mL four-necked reaction flask equipped with a thermometer, a nitrogen device and a stirrer. Stir the mixture of potassium chloride and 30g of distilled water to dissolve, vacuumize twice for 5 minutes each time, and pass nitrogen once in the middle for 5 minutes;

[0057] Step 2. Add 2g of bifunctional monomer diacrylate to 30g of acryloyloxyethyltrimethylammonium halide, dilute with 8g of distilled water and mix evenly, put it into the dropping funnel (a), and dissolve 4g of 2-acrylamide- with 25g of distilled water 2-Methylpropanesulfonic acid (salt) is loaded into the dropping funnel (b);

[0058] Step 3, under the condition of continuous stirring and nitrogen flow, add the mixture of 0.35g redox initiator potassium persulfate and sodium bisulfite at one time, the ratio of the amount of oxidizing agent to reducing agent is 1: 0...

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Abstract

The invention discloses a water-soluble organic amphoteric copolymeric flocculant and a preparation method thereof. The water-soluble organic amphoteric copolymeric flocculant is a copolymer formed by copolymerizing three monomers-acryloxy ethyl trimethyl ammonium halide, methacrylic acid-N, N-dimethylamino ethyl ester and 2-acrylamide-2-methyl propanesulfonic acid (methyl propanesulfonate) as well as bifunctional monomer-diacrylate. A redox initiator, an inorganic peroxide initiator and a polymerizing additive are used in the preparation process at the same time, so that the conversion rate of the monomers is increased and the residual monomers are reduced; the flocculant can be easily prepared and can be directly used; and the prepared flocculant has the advantages of small usage amount, large flocculant diameter, high quick settlement speed and the like.

Description

technical field [0001] The invention relates to a water-soluble organic amphoteric copolymer 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 waste (sewage) t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F220/34C08F220/58C08F222/10C08F4/40C08F4/30
Inventor 朱明丁瑶张静
Owner SICHUAN NORMAL UNIVERSITY
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