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Silicon-containing cationic polyacrylamide and application thereof

A polyacrylamide, cationic technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of oil droplet adsorption and insignificant coalescence effect, achieve high COD removal rate and solid sedimentation rate, improve efficiency and quality, the effect of high oily substance removal rate

Active Publication Date: 2022-04-05
XINXIANG BOYUAN WATER PURIFYING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practical applications, polyacrylamide is ideal for the treatment of suspended particles with hydrophilic surfaces. However, when there are oily substances in sewage, such as dispersed and emulsified oil droplets, polyacrylamide has a strong hydrophilicity. Water-based, the effect of adsorption and coalescence of oil droplets is not significant

Method used

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  • Silicon-containing cationic polyacrylamide and application thereof
  • Silicon-containing cationic polyacrylamide and application thereof
  • Silicon-containing cationic polyacrylamide and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of modified cationic polyacrylamide

[0032] By weight, the following raw material components were used:

[0033] (1) 35 parts acrylamide;

[0034] (2) 25 parts of acryloyloxyethyltrimethylammonium chloride;

[0035] (3) 0.0025 parts of pentasodium diethylenetriaminepentaacetate;

[0036] (4) 0.001 part of adipic acid;

[0037] (5) 60 parts of deionized water;

[0038] (6) 2 servings of Tween 20.

[0039] After the above-mentioned raw material components are distributed into a uniform solution, 2 parts of 2-(trimethylsiloxy) ethyl methacrylate are added, and stirred for 10 minutes under high-speed stirring at 10,000 rpm to obtain a polymerization solution and added to the reaction. In the kettle, nitrogen is passed through to remove oxygen until the oxygen content is lower than 0.2%. Adjust the temperature of the system in the reaction kettle to 2-3 ℃ by a water bath, dissolve 0.0005 parts of ammonium persulfate and 0.0005 parts of sodium thi...

Embodiment 2

[0040] Example 2 Preparation of modified cationic polyacrylamide

[0041] By weight, the following raw material components were used:

[0042] (1) 45 parts of acrylamide;

[0043] (2) 35 parts of methacryloyloxyethyltrimethylammonium chloride;

[0044] (3) 0.005 part of pentasodium diethylenetriaminepentaacetate;

[0045] (4) 0.002 part of glutaric acid;

[0046] (5) 75 parts of deionized water;

[0047] (6) 3 servings of Tween 60.

[0048]After the above-mentioned raw material components are distributed into a uniform solution, 3 parts of 2-(trimethylsiloxy) ethyl methacrylate are added, and stirred for 10 minutes under high-speed stirring at 10,000 rpm to obtain a polymerization solution and added to the reaction In the kettle, nitrogen is passed through to remove oxygen until the oxygen content is lower than 0.2%. Adjust the temperature of the system in the reaction kettle to 2-3 ℃ through a water bath, dissolve 0.00065 parts of ammonium persulfate and 0.00065 parts o...

Embodiment 3

[0050] Example 3 Preparation of modified cationic polyacrylamide

[0051] By weight, the following raw material components were used:

[0052] (1) 55 parts of acrylamide;

[0053] (2) 55 parts of acryloyloxyethyltrimethylammonium chloride;

[0054] (3) 0.01 part of pentasodium diethylenetriaminepentaacetate;

[0055] (4) 0.003 part of succinic acid;

[0056] (5) 85 parts of deionized water;

[0057] (6) 5 servings of Tween 80.

[0058] After the above-mentioned raw material components are distributed into a uniform solution, 5 parts of 2-(trimethylsiloxy) ethyl methacrylate are added, and stirred for 10 minutes under high-speed stirring at 10,000 rpm to obtain a polymerization solution and added to the reaction. In the kettle, nitrogen is passed through to remove oxygen until the oxygen content is lower than 0.2%. Adjust the temperature of the system in the reaction kettle to 2-3 ℃ through a water bath, dissolve 0.00075 parts of ammonium persulfate and 0.00075 parts of s...

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Abstract

The invention provides silicon-containing cationic polyacrylamide, which is prepared from the following comonomers in parts by weight: 20 to 60 parts of acrylamide, 1 to 10 parts of silicon-containing comonomer and 20 to 60 parts of cationic monomer. The invention also provides an application of the silicon-containing cationic polyacrylamide as an oil-containing sewage treatment agent. According to the cationic polyacrylamide provided by the invention, an oleophylic long-chain silicon-containing copolymerization unit is innovatively introduced to a conventional hydrophilic main chain, so that hydrophilic suspended particles can be effectively adsorbed and coalesced, adsorption and coalescence of oil drops can be effectively promoted, and meanwhile, the emulsified surface of the oil drops can be destroyed by virtue of an irregular configuration of the cationic polyacrylamide, so that the adsorption and coalescence of the oil drops can be effectively promoted. The stability of oil drops is reduced, and the aggregation of the oil drops is promoted, so that the sewage treatment efficiency of a polyacrylamide product can be greatly improved, and the method is particularly suitable for treating oil-containing sewage.

Description

technical field [0001] The invention relates to the field of polyacrylamide, in particular to a silicon-containing cationic polyacrylamide and its use as an oily sewage treatment agent. Background technique [0002] Polyacrylamide is the most commonly used adjuvant for water treatment. It is widely used because of its good water solubility and strong flocculation and bridging ability. As a flocculant, the main function of polyacrylamide in the water treatment process is to link and bridge the suspended particles in the water through its long molecular chain, and then aggregate and settle. Therefore, different types of polyacrylamide have certain applications in the water treatment process. For example, cationic polyacrylamide is usually used for municipal sewage with negative charges on the surface of suspended particles. Anionic polyacrylamide is used. [0003] In practical applications, the treatment effect of polyacrylamide on the surface of suspended particles is very ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F230/08C08F220/34C02F1/56
Inventor 肖银宝王引成毛彦科王法瑞牛富贵朱真
Owner XINXIANG BOYUAN WATER PURIFYING MATERIALS CO LTD
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