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A kind of anti-hydrolysis cationic flocculant and its preparation method and application method

An anti-hydrolysis and flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. Advanced problems, to achieve the effect of good economic and social benefits

Active Publication Date: 2021-01-05
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in view of the influence of metal ions in water on the viscosity of flocculants, existing patents mainly use different complexing agents to inhibit hydrolysis during application, such as patent CN102849835A using organic treatment agents, mainly including sodium potassium 2,3-dihydroxysuccinate , hydroxyethylidene diphosphoric acid and other complexing agents to complex metal ions, the amount of complexing agent is large, the cost is high, and the stability is poor
Patent CN104232054B uses complex complexing agent to improve the viscosity stability of polyacrylamide, complexing agent has many varieties, large dosage, high cost and poor stability

Method used

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  • A kind of anti-hydrolysis cationic flocculant and its preparation method and application method

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Embodiment 1

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0025] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

example 1

[0030] In this example, three sample examples are used for comparison, namely the cationic flocculant (sample 1) without introducing functional monomer, the cationic flocculant (sample 2) introducing functional monomer, and the cationic flocculant introducing functional monomer (sample 2). The cationic flocculant of the body and used in conjunction with organic acids (sample 3), such as figure 1 As shown, it can be confirmed that the introduction of functional monomers and the use of organic acids have the lowest viscosity drop and the least hydrolysis of cationic flocculants.

[0031] Sample 1: Add 108g of acrylamide, 259.2g of diallyldimethylammonium chloride (cationic monomer) and 224.8g of deionized water into a beaker, mechanically stir until completely dissolved, and add 0.005g of ammonium persulfate to the solution (water-soluble oxidizing agent), obtain water phase; 168g 5# industrial white oil, 14g sorbitan monooleate, 26g polyoxyethylene sorbitan monooleate, add in t...

example 2

[0035] Add 144g of acrylamide, 216g of methacryloxyethyltrimethylammonium chloride, 7.2g of methacrylic acid and 224.8g of deionized water into a beaker, stir mechanically until completely dissolved, and add 0.005g of ammonium persulfate to the solution , to obtain the water phase; 168g 5# industrial white oil, 14g sorbitan monooleate, 26g polyoxyethylene sorbitan monooleate, add in the reactor, stir to obtain the oil phase; the configured water The phase is slowly dropped into the oil phase to obtain a pre-emulsion; 0.3% sodium bisulfite is added dropwise to the pre-emulsion for initiation to obtain a hydrolysis-resistant cationic flocculant. Take 2000ml of river water (salinity: 500-1000mg / L), first add 2g of adipic acid, mix well; finally add 10g of anti-hydrolysis cationic flocculant, stir for 1 hour and place it in an oven at 45°C for 24 hours, the viscosity drops ≤ 20%.

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Abstract

The invention discloses a hydrolysis-resistant cationic emulsion flocculant, and a preparation method and an application method thereof. The preparation method comprises the following steps: adding acrylamide, a cationic monomer, a functional monomer and a water-soluble oxidant into deionized water to obtain a water-phase solution; adding a non-ionic emulsifier into solvent oil to obtain an oil-phase solution; slowly dropwise adding the water-phase solution into the oil-phase solution, and carrying out uniform stirring to obtain a water-in-oil pre-emulsion; introducing nitrogen into the pre-emulsion to remove oxygen; and adding a reducing agent into the pre-emulsion to initiate polymerization to obtain the hydrolysis-resistant cationic emulsion flocculant. According to the invention, the structure of the cationic emulsion flocculant is improved, the functional monomers are added, namely groups capable of reacting with metal ions such as Ca<2+>, Mg<2+> and the like are introduced in thepolymerization process, and influence of the metal ions such as Ca<2+>, Mg<2+> and the like on viscosity of the cationic emulsion flocculant is eliminated in cooperation with organic acid, so that viscosity reduction of the flocculant can be controlled to be 20% or below within 24 hours at a high temperature (35-45 DEG C).

Description

technical field [0001] The invention belongs to the synthesis and application of water treatment chemicals, in particular to a hydrolysis-resistant cationic flocculant and its preparation method and application method. Background technique [0002] With the increase of urban population and the rapid development of modern industry, domestic sewage and industrial wastewater have increased dramatically, causing rivers to be polluted to varying degrees. At present, polymer flocculants are widely used in the field of sewage treatment because of their advantages such as controllable structure, wide pH range, small dosage, good flocculation effect, no metal residue and less sludge generation. However, during the use of polymer flocculants, river water, lake water or river water are often used to dissolve flocculants, and these waters contain more Ca 2+ , Mg 2+ and other metal ions, Ca 2+ , Mg 2+ The electrostatic attraction interaction between the metal ions and the carboxylate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/04C08F220/58C08F220/34C08F220/56C08F220/06C08F2/30C02F1/56C02F11/147C02F11/00
CPCC02F1/56C02F11/00C08F2/30C08F220/34C08F226/04C02F11/147C08F220/56C08F220/06
Inventor 李平徐志新刘竹青须勇何国锋魏星光
Owner JIANGSU FEYMER TECH