A kind of silicon-containing cationic polyacrylamide and its application

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, promote oil The effect of drip coalescence and high removal rate of oily substances

Active Publication Date: 2022-05-13
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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  • A kind of silicon-containing cationic polyacrylamide and its application
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  • A kind of silicon-containing cationic polyacrylamide and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1 Preparation of modified cationic polyacrylamide

[0032] In parts by weight, the following raw material components are used:

[0033] (1) 35 parts of 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 deionized water;

[0038] (6) 2 parts Tween 20.

[0039] After distributing the above raw material components into a uniform solution, add 2 parts of 2-(trimethylsilyloxy)ethyl methacrylate, and stir for 10 minutes under high-speed stirring at 10,000 rpm to obtain a polymerization solution and add it to the reaction In the kettle, pass nitrogen to remove oxygen until the oxygen content is lower than 0.2%. Adjust the temperature of the system in the reaction kettle at 2-3°C with a water bath, dissolve 0.0005 parts of ammonium persulfate and 0.0005 parts of sodium thiosulfate in 1 part of deionize...

Embodiment 2

[0040] Example 2 Preparation of modified cationic polyacrylamide

[0041] In parts by weight, the following raw material components are used:

[0042] (1) 45 parts of acrylamide;

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

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

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

[0046] (5) 75 parts deionized water;

[0047] (6) 3 servings Tween 60.

[0048]After distributing the above-mentioned raw material components into a uniform solution, add 3 parts of 2-(trimethylsiloxy)ethyl methacrylate, and stir for 10 minutes under high-speed stirring at 10,000 rpm to obtain a polymerization solution and add it to the reaction In the kettle, pass nitrogen to remove oxygen until the oxygen content is lower than 0.2%. Adjust the temperature of the system in the reactor by a water bath at 2-3°C, dissolve 0.00065 parts of ammonium persulfate and 0.00065 parts of sodium thiosulfate in 1 part of ...

Embodiment 3

[0050] Example 3 Preparation of modified cationic polyacrylamide

[0051] In parts by weight, the following raw material components are 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 parts of succinic acid;

[0056] (5) 85 parts deionized water;

[0057] (6) 5 servings Tween 80.

[0058] After distributing the above-mentioned raw material components into a uniform solution, add 5 parts of 2-(trimethylsiloxy)ethyl methacrylate, and stir for 10 minutes under high-speed stirring at 10,000 rpm to obtain a polymerization solution and add it to the reaction In the kettle, pass nitrogen to remove oxygen until the oxygen content is lower than 0.2%. Adjust the temperature of the system in the reactor to 2-3°C with a water bath, dissolve 0.00075 parts of ammonium persulfate and 0.00075 parts of sodium thiosulfate in 1 part of dei...

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Abstract

The invention provides a silicon-containing cationic polyacrylamide, and its comonomers include: 20-60 parts of acrylamide, 1-10 parts of silicon-containing comonomers and 20-60 parts of cationic monomers in parts by weight. . The invention also provides the use of the silicon-containing cationic polyacrylamide as an oily sewage treatment agent. The cationic polyacrylamide provided by the present invention innovatively introduces lipophilic long-chain silicon-containing copolymerization units into the conventional hydrophilic main chain, which can not only effectively absorb and aggregate hydrophilic suspended particles, but also effectively Promote the adsorption and coalescence of oil droplets, and at the same time destroy the emulsified surface of oil droplets with its irregular configuration, reduce the stability of oil droplets, and promote the aggregation of oil droplets, which can greatly improve the sewage treatment of polyacrylamide products Efficiency, so it is especially suitable for the treatment of oily 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 additive for water treatment, and 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, and cationic polyacrylamide is usually used for sewage with positive charges on the surface of suspended particles. Anionic polyacrylamide is used. [0...

Claims

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Application Information

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Patent Type & Authority Patents(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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