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Preparation method of hydrophobic modified cationic polyacrylamide flocculant

A polyacrylamide, hydrophobic modification technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor flocculation effect, achieve the effect of improving flocculation effect, accelerating sedimentation speed, and reducing hydrophilic performance

Active Publication Date: 2013-09-25
格润化学(东营)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies of the prior art, the present invention provides a method for preparing a hydrophobically modified cationic polyacrylamide flocculant, which solves the problem of poor flocculation effect of the existing cationic polyacrylamide flocculant

Method used

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Embodiment 1

[0014] A preparation method of a hydrophobically modified cationic polyacrylamide flocculant, comprising the following steps:

[0015] (1) After mixing acrylamide, acryloyloxyethyltrimethylammonium chloride, butyl acrylate, perfluorooctylethyl acrylate and surfactant, add deionized water and stir evenly to obtain a mass concentration of 20 % polymerized monomer aqueous solution, the molar ratio of acrylamide, acryloyloxyethyltrimethylammonium chloride, butyl acrylate and perfluorooctyl ethyl acrylate is 100:15:4:0.5, and the surfactant accounts for 1% of the weight of the polymerized monomer aqueous solution; the surfactant is a mixture of sodium lauryl sulfate and cetyltrimethylammonium bromide, and the mass ratio of the two is 1:1;

[0016] (2) Then add tetrasodium edetate, sodium benzoate, boric acid, isopropanol and urea and mix evenly. The dosages of tetrasodium edetate, sodium benzoate, boric acid, isopropanol and urea are respectively 0.012%, 0.006%, 0.006%, 0.020%, 0....

Embodiment 2

[0021] A preparation method of a hydrophobically modified cationic polyacrylamide flocculant, comprising the following steps:

[0022] (1) After mixing acrylamide, acryloyloxyethyltrimethylammonium chloride, butyl acrylate, perfluorooctyl ethyl acrylate and surfactant, add deionized water and stir evenly to obtain a mass concentration of 25 % polymerized monomer aqueous solution, the molar ratio of acrylamide, acryloyloxyethyltrimethylammonium chloride, butyl acrylate and perfluorooctyl ethyl acrylate is 100:20:3:0.8, and the surfactant accounts for 2% of the weight of the polymerized monomer aqueous solution; the surfactant is a mixture of sodium lauryl sulfate and cetyltrimethylammonium bromide, and the mass ratio of the two is 1:1.5;

[0023] (2) Then add tetrasodium edetate, sodium benzoate, boric acid, isopropanol and urea and mix evenly. The dosages of tetrasodium edetate, sodium benzoate, boric acid, isopropanol and urea are respectively 0.014%, 0.008%, 0.008%, 0.024%,...

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Abstract

A preparation method of hydrophobic modified cationic polyacrylamide flocculant comprises the following steps: weighing and mixing acrylamide, acryloyloxyethyl trimethyl ammonium chloride, butyl acrylate, perfluorinated octyl ethyl acrylate and a surfactant, obtaining polymer monomer aqueous solution by adding deionized water and mixing well by stirring, and then adding a plurality of additives; adding a compound initiator for polymerization and then adding a photoinitiator for polymerization; after the polymerization reaction, taking out colloidal particles for prilling, drying, crushing, and sifting, so that the hydrophobic modified cationic polyacrylamide flocculant is obtained. The flocculant provided by the present invention is able to improve the adsorption capacity of polymers to suspended particles, especially organic matters in water, by introducing lyophobic group into the macromolecule of the flocculant. Meanwhile, the flocculant possesses the properties of hydrophobic associating polymer, which is beneficial to the interaction between macromolecules, reducing the hydrophilic performance of the floc body, increasing the settling velocity of the floc body, and improving intensity of the flocs and water separation capability of the filter cake.

Description

technical field [0001] The invention relates to the field of organic polymers, in particular to a method for preparing a hydrophobically modified cationic polyacrylamide flocculant. Background technique [0002] Polyacrylamide (PAM) is a general term for acrylamide (Acrylamide, AM) homopolymers or linear polymers obtained by copolymerization with other monomers, including anionic (APAM) and cationic (CPAM), liquid and gel , powder and other physical forms. Polyacrylamide is a linear water-soluble polymer. It is one of the most widely used varieties of water-soluble polymers. It has a wide range of applications in industries such as building materials and agriculture, and is known as "all-industry additives" and "universal products". Polyacrylamide is a fine chemical product and also belongs to the category of new materials. Among them, ultra-high molecular weight polyacrylamide is one of the eight major fine chemical products prioritized by the country, and it is also one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/34C08F220/18C08F220/24C02F1/56
Inventor 李海涛李恒滨毛凤
Owner 格润化学(东营)有限公司
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