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A method for preparing cationic polyacrylamide microparticles by inverse emulsion polymerization

A technology of inverse emulsion polymerization and polyacrylamide, which is applied in the field of preparing cationic polyacrylamide particles by inverse emulsion polymerization, can solve problems such as poor flocculation effect, and achieve the effect of obvious flocculation effect.

Active Publication Date: 2020-06-30
西安栗禾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing cationic polyacrylamide microparticles by inverse emulsion polymerization, which solves the problem of poor flocculation effect of the product prepared by the current cationic polyacrylamide preparation method

Method used

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  • A method for preparing cationic polyacrylamide microparticles by inverse emulsion polymerization
  • A method for preparing cationic polyacrylamide microparticles by inverse emulsion polymerization

Examples

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Embodiment 1

[0026] A method for preparing cationic polyacrylamide particles by inverse emulsion polymerization, comprising the steps of:

[0027] S1. Add 48 parts of mixed solvent and 7 parts of emulsifier to a four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, and place the four-necked flask containing the mixed solution in a water bath for heating in a water bath. Mix and stir for 5 minutes, wherein the heating temperature of the water bath is 25°C, and the stirring rate is 400r / min;

[0028] S2, the four-necked flask is connected to the ventilation tube, and then feeds 15min of N 2 , in order to remove the dissolved oxygen in the mixture;

[0029] S3. Slowly add 33 parts of acrylamide monomer and 8 parts of methacryloyloxyethyltrimethylammonium chloride cationic agent along the additive addition port of the four-necked flask, and then continue to maintain the temperature at 25°C and continue stirring for 25 minutes. Fully emulsify;

[0030] S4. After em...

Embodiment 2

[0038] A method for preparing cationic polyacrylamide particles by inverse emulsion polymerization, comprising the steps of:

[0039] S1. Add 50 parts of mixed solvent and 7.3 parts of emulsifier to a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, and place the four-necked flask containing the mixed solution in a water bath for heating in a water bath. Mix and stir for 5 minutes, wherein the heating temperature of the water bath is 27°C, and the stirring rate is 500r / min;

[0040] S2, the four-necked flask is connected to the ventilation tube, and then feeds 17min of N 2 , in order to remove the dissolved oxygen in the mixture;

[0041] S3. Slowly add 35 parts of acrylamide monomer and 9 parts of methacryloyloxyethyltrimethylammonium chloride cationic agent along the additive addition port of the four-necked flask, and then continue to maintain the temperature at 27°C and continue stirring for 30 minutes. Fully emulsify;

[0042] S4. After...

Embodiment 3

[0050] A method for preparing cationic polyacrylamide particles by inverse emulsion polymerization, comprising the steps of:

[0051] S1. Add 52 parts of mixed solvent and 7.5 parts of emulsifier to a four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, and place the four-necked flask containing the mixed solution in a water bath for heating in a water bath. Mix and stir for 5 minutes, wherein the heating temperature of the water bath is 30°C, and the stirring rate is 600r / min;

[0052] S2, the four-necked flask is connected to the vent pipe, and then fed into 20min of N 2 , in order to remove the dissolved oxygen in the mixture;

[0053] S3. Slowly add 37 parts of acrylamide monomer and 10 parts of methacryloyloxyethyltrimethylammonium chloride cationic agent along the additive addition port of the four-necked flask, and then continue to maintain the temperature at 30°C and continue stirring for 35 minutes. Fully emulsify;

[0054] S4. After emu...

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Abstract

The invention discloses a method for preparing cationic polyacrylamide particles through inverse emulsion polymerization. The method comprises the following steps of adding 48 to 52 parts of mixed solvents and 7 to 7.5 parts of emulsifiers into a four-opening flask provided with a stirrer, a temperature indicator and a backflow condensing pipe; then, introducing N2 for 15 to 20min; finally, adding33 to 37 parts of acrylamide monomers, 8 to 10 parts of methacryloxyethyltrimethyl ammonium chloride cation surface active agents and 0.02 to 0.03 part of initiators; regulating pH value of the reaction liquid to 2.5 to 3.5; performing continuous stirring for reaction for 4 to 5h; precipitating the obtained cationic polyacrylamide latex by absolute ethyl alcohol; performing washing, suction filtering and drying; putting the obtained dry powder into a vacuum baking oven being 48 to 52 DEG C to be subjected to vacuum drying for 4 to 6h; finally, obtaining polymer dry powder. The method providedby the invention solves the problem that the product prepared by the existing cationic polyacrylamide preparation method has a poor flocculation effect.

Description

technical field [0001] The invention relates to the technical field of polyacrylamide preparation, in particular to a method for preparing cationic polyacrylamide particles by inverse emulsion polymerization. Background technique [0002] The structural unit of polyacrylamide contains amide groups, which are easy to form intramolecular and intermolecular hydrogen bonds, so that PAM has good thickening, flocculation, and drag reduction effects. Therefore, PAM is widely used in water treatment, oil recovery, and papermaking. Has a wide range of applications. In the field of sewage treatment, especially in the treatment of neutral or alkaline wastewater, steel plant wastewater, electroplating plant wastewater, metallurgical wastewater, coal washing wastewater, etc., PAM is a very effective flocculant. In the field of tertiary oil recovery, AM is a water plugging and profile control agent, which can enhance oil recovery. In the field of papermaking, PAM is a retention and drai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/34C08F4/40C08F2/30
CPCC08F2/30C08F4/40C08F220/56C08F220/34
Inventor 谢静
Owner 西安栗禾新材料科技有限公司