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Positive ion organic high polymer coagulant and preparation method thereof

An organic polymer and flocculant technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unsatisfactory flocculant treatment effect, inability to fully neutralize anions, and increased operating costs, and achieve easy control of reaction conditions, The effect of low equipment cost and large molecular weight

Inactive Publication Date: 2009-01-21
王旭东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the flocculants commonly used to treat wastewater mainly include: cationic polyacrylamide, nonionic polyacrylamide, anionic polyacrylamide and sodium polyacrylate, etc., due to the waste water and sludge produced in oil fields, refineries, paper mill deinking workshops, etc. It contains more anions, its properties are relatively stable, flocculation and precipitation are difficult, and the discharge rate is also unstable, resulting in the current flocculants not ideal for its treatment effect. Adding an appropriate amount of flocculants cannot fully neutralize anions, and adding too much will cause flocculation. Particles are redispersed, which increases the difficulty of post-processing and increases the operating cost

Method used

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  • Positive ion organic high polymer coagulant and preparation method thereof
  • Positive ion organic high polymer coagulant and preparation method thereof
  • Positive ion organic high polymer coagulant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: flocculant of the present invention

[0030] (1) Take 0.1 mole of acrylamide monomer and 0.1 mole of methyl acrylate monomer, dissolve them in water in a three-necked flask to form a solution with a total monomer concentration of 15%, pass nitrogen to drive away the oxygen, and then continuously fill with nitrogen as Protective gas, respectively adding 0.02% of the total solution mass of potassium persulfate and 0.02% of the total solution mass of sodium sulfite as initiators, and polymerizing at a constant temperature of 60°C for 24 hours to obtain an acrylamide-methyl acrylate copolymer;

[0031] (2) Take 0.1 mole of 2,3-epoxypropyltrimethylammonium chloride monomer, and add 2,3-epoxypropyltrimethylammonium chloride while stirring (stirring speed 30rpm) at 70°C Ammonium, after all the addition, continue to react for 20 minutes to obtain acrylamide-methyl acrylate trimethylammonium chloride solution; then dry and pulverize the solution at 90°C to obtain t...

Embodiment 2

[0033] Embodiment 2: flocculant of the present invention

[0034] (1) Under the condition of stirring (stirring rate 40rpm), 0.5 moles of trimethylamine and 0.5 moles of epichlorohydrin were added to the reaction kettle, and reacted for 5 hours in a water bath at 50°C to obtain 2,3-epoxypropyltri Methyl ammonium chloride;

[0035] (2) Take 1 mole of acrylamide and 0.5 mole of methyl acrylate, dissolve in water in another reaction kettle to form a solution with a total monomer concentration of 15%, pass nitrogen to drive away the oxygen, and then continuously fill with nitrogen as a protective gas. The initiator potassium persulfate and sodium sulfite were added in an amount of 0.02%, and the polymerization reaction was carried out at a constant temperature of 65°C for 36 hours to obtain an acrylamide-methyl acrylate copolymer;

[0036] (3) At 75°C, add 2,3-epoxypropyltrimethylammonium chloride to the acrylamide-methyl acrylate copolymer while stirring (stirring rate 40rpm), a...

Embodiment 3

[0038] Embodiment 3: the preparation method of flocculant of the present invention

[0039] (1) Take 0.2 moles of acrylamide and 0.2 moles of methyl acrylate, dissolve them in water in a three-necked flask to form a solution with a total monomer concentration of 15%, pass nitrogen to drive out oxygen, and then continuously fill with nitrogen as a protective gas , respectively adding potassium persulfate in an amount of 0.03% and sodium sulfite in an amount of 0.06% as an initiator, and polymerizing at a constant temperature of 60° C. for 24 hours to obtain an acrylamide-methyl acrylate copolymer;

[0040] (2) Take 0.2 moles of 2,3-epoxypropyltrimethylammonium chloride, and slowly add it to the acrylamide-methyl acrylate copolymer at 80°C while stirring (stirring rate 70rpm), and complete the addition The reaction was continued for another 20 minutes to obtain an acrylamide-methyl acrylate trimethylammonium chloride solution; then the solution was dried and pulverized at 100° C...

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Abstract

The invention discloses a making method of cationic organic macromolecular flocculant, which is copolymerized by 2, 3-epoxy propyl trimethyl ammonium chloride, methyl acrylate and acrylamide with molar rate at 1-2:2:1-4 without sequence, wherein the 2, 3-epoxy propyl trimethyl ammonium chloride is grafted on the lateral chain of acrylamide-methyl acrylate copolymer; the molecular weight of flocculant is 1000000-15000000, which can flocculate water void water with the removing rate of COD to 93.4%.

Description

technical field [0001] The invention relates to polymer compounds, in particular to a cationic organic polymer flocculant and a preparation method thereof. Background technique [0002] At present, the flocculants commonly used to treat wastewater mainly include: cationic polyacrylamide, nonionic polyacrylamide, anionic polyacrylamide and sodium polyacrylate, etc., due to the waste water and sludge produced in oil fields, refineries, paper mill deinking workshops, etc. It contains more anions, its properties are relatively stable, flocculation and precipitation are difficult, and the discharge rate is also unstable, resulting in the current flocculants not ideal for its treatment effect. Adding an appropriate amount of flocculants cannot fully neutralize anions, and adding too much will cause flocculation. Particles are redispersed, which increases the difficulty of post-processing and increases the operating cost. Contents of the invention [0003] In order to overcome t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/56C08F8/30C08K5/19C02F1/56
Inventor 王旭东
Owner 王旭东