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Preparation method of hydrophobic modified cation polyacrylamide flocculating agent

A technology of polyacrylamide and hydrophobic modification, 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, facilitating interaction, and improving the strength of flocs

Active Publication Date: 2013-09-25
SHANDONG SHUIHENG CHEM
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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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Effect test

Embodiment 1

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

[0015] (1) Weigh and mix acrylamide, dimethyl diallyl ammonium chloride, butyl acrylate and surfactant, then add deionized water and stir evenly to obtain a polymerized monomer aqueous solution with a mass concentration of 15%, propylene The molar ratio of amide, dimethyl diallyl ammonium chloride and butyl acrylate is 100:15:4, and the surfactant accounts for 1% of the weight of the polymerized monomer aqueous solution; the surfactant is sodium lauryl sulfate and A mixture of cetyltrimethylammonium bromide, 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%, 0.06% of the weight of the polymerized monomer aqueous solution;

[0...

Embodiment 2

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

[0022] (1) Weigh and mix acrylamide, dimethyl diallyl ammonium chloride, butyl acrylate and surfactant, then add deionized water and stir evenly to obtain a polymerized monomer aqueous solution with a mass concentration of 18%. The molar ratio of acrylamide, dimethyl diallyl ammonium chloride and butyl acrylate is 100:20:5, and the surfactant accounts for 2% of the weight of the polymerized monomer aqueous solution; the surfactant is lauryl sulfuric acid A mixture of sodium and cetyltrimethylammonium bromide, 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 well, wherein the dosages of tetrasodium edetate, sodium benzoate, boric acid, isopropanol and urea are respectively 0.014%, 0.008%, 0.008%, 0.024%, 0.08% of the weight of the polymerized monomer aqueous soluti...

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Abstract

The invention discloses a preparation method of hydrophobic modified cation polyacrylamide flocculating agent including following steps: acrylamide, dimethyl diallyl ammonium chloride, butyl acrylate and surface-active agent are mixed after being weighed. Polymerized monomer water solution is obtained after the above mixture is stirred to be uniform with the addition of deionized water. All kinds of additives are then added in the polymerized monomer water solution; a compound initiator and then a photoinitiator are added for polymerization; after the polymerization reaction, colloidal particles are extracted for granulation, drying, crushing and sieving. The hydrophobic modified cation polyacrylamide is then obtained in the end. The flocculating agent prepared in the invention can improve the adsorption capacity of polymers to suspended particles especially organics in water through the introduction of hydrophobic groups into flocculating agent macromolecules. At the same time, the flocculating agent has a character of the hydrophobic association of high polymers which is in favor of the interaction between macromolecules, the reduction of the hydrophilic nature of flocs, the acceleration of the settling velocity of flocs and the improvement of the floccules intensity and the water separation capability of filter cakes.

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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IPC IPC(8): C08F220/56C08F226/02C08F220/18C02F1/56
Inventor 牛爱辉
Owner SHANDONG SHUIHENG CHEM
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