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A kind of ternary copolymerization cationic polyacrylamide

A polyacrylamide, cationic technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of product quality affecting the use effect of flocculants, not getting enough attention, low cationic degree, etc., to achieve excellent flocculation performance, The effect of improving solubility and high solubility

Active Publication Date: 2019-02-12
HENAN HONGKANG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual situation of most cationic polyacrylamide products at present is that products with high molecular weight have relatively low cationic degree, while products with high cationic degree have low molecular weight, and the defects of product quality seriously affect the use effect of flocculants.
In addition, the water solubility of cationic polyacrylamide solid powder products is also an important indicator in practical applications, but this point has not received enough attention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The ternary copolymerized cationic polyacrylamide provided in this example is prepared by the following steps:

[0028] (1) Prepare the cationic monomer E-AM, specifically: by mass percentage, weigh 25g (25%) of ETA (2,3-epoxypropyltrimethylammonium chloride), AM (monomer acrylamide ) 25g (25%), add 50mL (50%) of distilled water, stir to dissolve fully, put it in a water bath at 70°C for 2 hours, and cool down naturally to obtain the cationic monomer E-AM;

[0029] (2) Prepare monomer aqueous solution, specifically, by mass percentage, weigh AM (monomer acrylamide) 15g (15%), cationic monomer E-AM prepared in step (1) 5g (5%), DAC (acryloyloxyethyltrimethylammonium chloride) 5g (5%), add 75mL (75%) distilled water, stir evenly until completely dissolved, then the monomer with a mass concentration of 25% of the total monomer can be prepared aqueous solution;

[0030] (3) Ternary copolymerization, add 0.05g (0.05% of the mass of monomer aqueous solution) of ascorbic aci...

Embodiment 2

[0035] The ternary copolymerized cationic polyacrylamide provided in this example is prepared by the following steps:

[0036] (1) Prepare the cationic monomer E-AM, specifically: by mass percentage, weigh 30g (30%) of ETA (2,3-epoxypropyltrimethylammonium chloride), AM (monomer acrylamide ) 10g (10%), add 60mL (60%) of distilled water, stir to dissolve fully, put it in a water bath at 60°C for 3h, and let it cool naturally to obtain the cationic monomer E-AM;

[0037] (2) Prepare monomer aqueous solution, specifically, by mass percentage, weigh AM (monomer acrylamide) 22g (22%), cationic monomer E-AM prepared in step (1) 8g (8%), DAC (acryloyloxyethyltrimethylammonium chloride) 8g (8%), add 62mL (62%) distilled water, stir evenly until completely dissolved, then the monomer with a mass concentration of 38% of the total monomer can be prepared aqueous solution;

[0038] (3) Ternary copolymerization, add 0.09g (monomer aqueous solution mass 0.09%) ascorbic acid, 1.2g urea (mono...

Embodiment 3

[0043] The ternary copolymerized cationic polyacrylamide provided in this example is prepared by the following steps:

[0044] (1) Prepare the cationic monomer E-AM, specifically: by mass percentage, weigh 20g (20%) of ETA (2,3-epoxypropyltrimethylammonium chloride), AM (monomer acrylamide ) 50g (50%), add 30mL (30%) of distilled water, stir to dissolve fully, put it in a water bath at 70°C for 3 hours, and cool down naturally to obtain the cationic monomer E-AM;

[0045] (2) Prepare monomer aqueous solution, specifically, by mass percentage, weigh AM (monomer acrylamide) 25g (25%), cationic monomer E-AM prepared in step (1) 6g (6%), DAC (acryloyloxyethyltrimethylammonium chloride) 6g (6%), add 63mL (63%) distilled water, stir evenly until completely dissolved, then the monomer with a mass concentration of 37% of the total monomer can be prepared aqueous solution;

[0046] (3) Ternary copolymerization, add 0.15g (monomer aqueous solution mass 0.15%) ascorbic acid, 1.8g urea ...

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Abstract

The invention belongs to the technical field of flocculant in sewage treatment technology in environment engineering, and particularly relates to a terpolymer cationic polyacrylamide. The preparation method of the product comprises the following steps: preparation of a cationic monomer E-AM, preparation of a monomer water solution, terpolymerization of AM, E-AM and DAC, and the like. The terpolymer cationic polyacrylamide well embodies the high polymerization activity and favorable flocculation effect of the E-AM monomer and the characteristic that the DAC can be easily used for preparing high-molecular-weight copolymers. Compared with the existing common flocculant product, the terpolymer cationic polyacrylamide has the characteristics of high cation degree, high molecular weight and excellent flocculation property. The actual detection result indicates that the terpolymer cationic polyacrylamide also has the characteristic of high solubility, and thus, is suitable to be used as a flocculant in sewage treatment engineering.

Description

technical field [0001] The invention belongs to the technical field of flocculants for sewage treatment technology in environmental engineering, and in particular relates to a ternary copolymerization cationic polyacrylamide. Background technique [0002] In technical fields such as domestic and industrial sewage treatment and sludge dewatering, organic polymer flocculants play an important role. During the flocculation process, the polymer flocculant flocculates the small particles in the sewage into large particles through the functions of adsorption bridging, electrical neutralization, etc., and forms precipitation to achieve the purpose of separating pollutants from water. Among the organic polymer flocculants, cationic polyacrylamide has the advantages of wide application range of pH and less influence by coexisting salts, and has attracted more and more attention. [0003] In order to ensure a better flocculation and sedimentation effect, most cationic polyacrylamides...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/60C08F220/34C02F1/56
Inventor 汤广斌李丰登孙长城桑书梅李伟萍韩娟
Owner HENAN HONGKANG ENVIRONMENTAL PROTECTION TECH
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