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Method for preparing net-shaped cationic polyacrylamide

A polyacrylamide and cationic technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor water purification effect, increased dosing amount, and greater influence on flocculation effect

Active Publication Date: 2012-07-04
东营市诺尔化工有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculation effect is greatly affected by the strong shearing action of the centrifuge, which makes the water purification effect worse and the dosage increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The parts by weight of raw materials are: acrylamide 200, acryloxyethyltrimethylammonium chloride 166, structure regulator (such as N,N-dimethylbisacrylamide) 0.01, deionized water 624, potassium persulfate 0.042 and Sodium bisulfite 0.04.

[0010] The specific preparation process is:

[0011] (1) Add acrylamide, acryloyloxyethyltrimethylammonium chloride, and deionized water into the reactor and stir evenly, or use deionized water to make a solution and mix them, then add a structure regulator, and pass nitrogen gas Deoxygenation for 30 minutes;

[0012] (2) Adjust the pH value to 4-5 with acetic acid, add potassium persulfate and sodium bisulfite and polymerize at 2°C for 1 hour;

[0013] (3) After the reaction, take out the jelly, granulate the polymer, and dry the granule in an oven at 75°C;

[0014] (4) After 2 hours, take out the dried colloidal particles and pulverize them to obtain the product.

Embodiment 2

[0016] The parts by weight of raw materials are: acrylamide 267, methacryloxyethyltrimethylammonium chloride 86, structure regulator (such as N,N-dimethylbisacrylamide) 0.006, deionized water 647, ammonium persulfate 0.051 and sodium bisulfite 0.039.

[0017] The specific preparation process is:

[0018] (1) Add acrylamide, methacryloyloxyethyltrimethylammonium chloride, and deionized water into the reactor, stir evenly, add a structure regulator, and pass nitrogen gas to remove oxygen for 30 minutes;

[0019] (2) Adjust the pH value to 4-5 with acetic acid, add potassium persulfate and sodium bisulfite to polymerize at 4°C for 1.5-2.5 hours;

[0020] (3) After the reaction, take out the jelly, granulate the polymer, and dry the granule in an oven at 70°C;

[0021] (4) After 2 hours, take out the dried colloidal particles and pulverize them to obtain the product.

Embodiment 3

[0023] The parts by weight of raw materials are: acrylamide 200, N,N-dimethylacrylamide 40, acryloyloxyethyltrimethylammonium chloride 120, structure regulator (such as N,N-dimethylbisacrylamide) 0.008 , deionized water 640, hydrogen peroxide 0.045 and sodium bisulfite 0.042.

[0024] The specific preparation process is:

[0025] (1) Add non-ionic monomer and cationic monomer aqueous solution into the reactor, add structure regulator in proportion, and deoxygenate with nitrogen for 30 minutes;

[0026] (2) Adjust the pH value to 4-5 with acetic acid, add hydrogen peroxide and sodium bisulfite and polymerize at 5°C for 5 hours;

[0027] (3) After the reaction, take out the jelly, granulate the polymer, and dry the granule in an oven at 80°C;

[0028] (4) After 2 hours, take out the dried colloidal particles and pulverize them to obtain the product.

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PUM

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Abstract

The invention relates to the field of water-soluble polymer auxiliary chemicals, in particular to a method for preparing net-shaped cationic polyacrylamide, wherein raw materials are selected from the followings: 200-270 parts of nonionic monomer, 80-170 parts of cationic monomer, 0.006-0.01 part of structure modifier, 600-700 parts of deionized water, 0.08-0.12 part of initiator in parts by weight. The preparation method comprises the steps of: preparing a mixed solution of the nonionic monomer, the cationic monomer and the deionized water, adding the structure modifier into the solution, introducing nitrogen into the solution to remove oxygen, adjusting the pH value to 4- 5, and adding the initiator into the solution to perform polymerization at the temperature of 2-5 DEG C; after the reaction, granulating the polymer, drying the colloidal particles at the temperature of 70-80 DEG C and finally crushing to obtain a product with a net-shaped structure. The product is stronger in the absorption and capture capabilities for colloid and suspended particles in the water, better flocculation effect can be achieved with fewer amount of the product, in addition, flocculation blocks are firm, the shear resistance performance is stronger, and the influence of large shearing force of a centrifugal machine on the flocculation effect is smaller.

Description

technical field [0001] The invention relates to the field of polymerized water-soluble polymer chemical additives, in particular to a preparation method of network cationic polyacrylamide. Background technique [0002] In today's water treatment industry, the water quality is becoming more and more complex, and the requirements for water treatment chemicals are also increasing. Polyacrylamide, a commonly used polymer flocculant in the market, mostly has a linear structure. The flocculation effect is greatly affected by the strong shearing action of the centrifuge, which makes the water purification effect worse and the dosing amount increases. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing cationic polyacrylamide with a simple process in view of the defects in the prior art. The product has good solubility, better adaptability to water purification equipment and water quality, and better flocculation effect. ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/60C08F220/34C08F2/38C02F1/56
Inventor 荣敏杰于庆华许永升
Owner 东营市诺尔化工有限责任公司
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