Cationic flocculant and its preparation method

A cationic flocculant and its production method technology are applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, special treatment targets, etc. It can solve the problems of high residue amount and long flocculation time, achieve high flocculation degree and speed up Effect of flocculation speed and reduction of residue amount

Active Publication Date: 2019-04-16
四川科尔瑞环保科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most used organic polymer flocculants are cationic polyacrylamide and its modified flocculants. These flocculants focus on improving the cationic degree and molecular weight of the flocculants, but the flocculation time in high temperature environment is long, and after flocculation High residue levels in liquid systems

Method used

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  • Cationic flocculant and its preparation method
  • Cationic flocculant and its preparation method
  • Cationic flocculant and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This example provides a cationic flocculant, which is made of the following components:

[0051] Acrylamide 25g;

[0052] Methacryloyloxyethyltrimethylammonium chloride 30g;

[0053] Acryloyloxyethyltrimethylammonium chloride 20g;

[0054] Dimethyl diallyl ammonium chloride 10g;

[0055] Dimethylaminoethyl methacrylate 10g,

[0056] The weight of each of the above components is based on dry matter weight.

[0057] The preparation method of this flocculant is as follows:

[0058] In the first step, the raw materials of each component are dissolved in water to form an aqueous solution, and then the pH value of the aqueous solution is adjusted to 2 with citric acid to obtain a regulating solution.

[0059] In the second step, nitrogen is injected into the container holding the regulating liquid to discharge the oxygen in the regulating liquid so that the oxygen content of the regulating liquid is 0.001 mg / L to obtain a reaction liquid.

[0060] In the third step, amm...

Embodiment 2

[0077] This example provides a cationic flocculant, which is made of the following components:

[0078] Acrylamide 15g;

[0079] Methacryloyloxyethyltrimethylammonium chloride 35g;

[0080] Acryloyloxyethyltrimethylammonium chloride 20g;

[0081] Dimethyl diallyl ammonium chloride 15g;

[0082] Dimethylaminoethyl methacrylate 10g,

[0083] The weight of each of the above components is based on dry matter weight.

[0084] The preparation method of this flocculant is as follows:

[0085] In the first step, the raw materials of each component are dissolved in gram water to form an aqueous solution, and then the pH value of the aqueous solution is adjusted to 5 with adipic acid to obtain a regulating solution.

[0086] In the second step, nitrogen is injected into the container holding the regulating liquid to discharge the oxygen in the regulating liquid so that the oxygen content of the regulating liquid is 0.0004 mg / L to obtain a reaction liquid.

[0087] In the third ste...

Embodiment 3

[0104] This example provides a cationic flocculant, which is made of the following components:

[0105] Methacryloyloxyethyltrimethylammonium chloride 40g;

[0106] Acryloyloxyethyltrimethylammonium chloride 20g;

[0107] Dimethyl diallyl ammonium chloride 25g;

[0108] Dimethylaminoethyl methacrylate 15g,

[0109] The weight of each of the above components is based on dry matter weight.

[0110] The preparation method of this flocculant is as follows:

[0111] In the first step, the above-mentioned components are dissolved in water to form an aqueous solution, and then the pH value of the aqueous solution is adjusted to 4 with hydrochloric acid to obtain a regulating solution.

[0112] In the second step, nitrogen is injected into the container holding the regulating liquid to discharge the oxygen in the regulating liquid so that the oxygen content of the regulating liquid is 0.0001 mg / L to obtain a reaction liquid.

[0113] In the third step, potassium persulfate, sodiu...

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Abstract

The invention provides a cationic flocculant and a preparation method thereof and belongs to the field of flocculants. The cationic flocculant is mainly formed by copolymerization of acrylamide, DMC, DAC, DMDAAC and 2-(dimethylamino)ethyl methacrylate. The cationic flocculant has a relatively good flocculation effect in a high-acidity and high-temperature environment, also has a relatively high early-stage flocculation speed, and can shorten the flocculation time and reduce the amount of residues in a to-be-flocculated solution system.

Description

technical field [0001] The invention relates to the field of flocculants, in particular to a cationic flocculant and a preparation method thereof. Background technique [0002] Flocculants are agents used to aggregate particles, which are widely used in the fields of water supply and sewage treatment. The organic polymer flocculant has the characteristics of less dosage, less scum output, strong flocculation ability, easy separation of flocs, and good effect of removing oil and suspended matter. At present, the most used organic polymer flocculants are cationic polyacrylamide and its modified flocculants. These flocculants focus on improving the cationic degree and molecular weight of the flocculants, but the flocculation time in high temperature environment is long, and after flocculation The amount of residue in the liquid system is higher. Contents of the invention [0003] The purpose of the present invention is to provide a cationic flocculant and its preparation me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F220/56C08F226/02C02F1/56C02F11/14
CPCC02F1/56C02F11/14C02F2303/06C08F220/34C08F220/56C08F226/02
Inventor 周旭刘征东
Owner 四川科尔瑞环保科技有限责任公司
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