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    Home > Chemicals Industry > Chemical Technology > Acrylamide-(2-methacryloyloxyethyl)trimethylammonium chloride copolymer

    Acrylamide-(2-methacryloyloxyethyl)trimethylammonium chloride copolymer

    • Last Update: 2021-10-21
    • Source: Internet
    • Author: User
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    [Preparation method] The preparation method of acrylamide-(2-methacryloyloxyethyl)trimethylammonium chloride copolymer is mainly aqueous solution polymerization and reverse microemulsion polymerization
    .

    (1) Aqueous polymerization method

    Ma Shaojun synthesized poly(2-methacryloyloxyethyl)trimethylammonium chloride (DMMC)-acrylamide (AM) cationic copolymer by aqueous solution polymerization method, and analyzed and discussed the monomer concentration, initiator concentration and The influence of the pH value of the polymerization system on the intrinsic viscosity of the copolymer
    .


    The preparation method is as follows: install an N 2 tube and a dropping funnel on a 1000 mL three-neck glass kettle , and place it in a super constant temperature water bath


    (2) Reverse microemulsion polymerization method

    Luo Qingzhi and others used oleic acid anhydrous sorbitan ester Span80 and nonylphenol polyoxyethylene ether OP10 as emulsifiers, white oil as continuous medium, and peroxydicarbonate (2-ethylhexyl ester) (EHP) as initiator.
    Acrylamide /(2-methacryloxyethyl)trimethylammonium chloride (AM/DMMC) inverse microemulsion copolymerization
    .


    Preparation method: The monomer aqueous solution and the white oil containing a certain emulsifier were blown nitrogen to drive oxygen for 30 minutes, and then the white oil and the monomer aqueous solution were added to a stirred 1000mL four-neck flask under the protection of nitrogen, and the mixture was fully emulsified for 30 minutes and then added The initiator EHP performs the polymerization reaction


    [Application] Ma Shaojun uses inverse emulsion polymerization to prepare 50% cationic degree of 2-methacryloyloxyethyltrimethylammonium chloride-acrylamide copolymer, and uses the product for chemical wastewater biochemical treatment.
    The dehydration test of the sludge found that after the 30mg/L copolymer product was used to treat the biochemical sludge, the moisture content of the filter cake dropped from 82.
    5% to 72.
    7%
    .

    Shi Zhou et al.
    used the cationic polymer flocculant CPF, which is polymerized by methacryloyl trimethyl ammonium chloride and acrylamide, to test the sedimentation and dehydration performance of sludge water from the water plant, and combined it with aluminum sulfate and polyaluminum chloride ( PAC), composite aluminum-iron and non-ionic polyacrylamide were compared for sedimentation and dewatering performance.
    It was found that the inorganic flocculant aluminum sulfate and PAC composite aluminum-iron had limited improvement in sludge sedimentation and dewatering performance.
    CPF had a limited effect on sludge sedimentation performance.
    The improvement effect of sludge is the most significant, and PAM improves the dewatering performance of sludge more prominently (making the specific resistance of sludge greatly reduced)
    .


    Therefore, the coagulation of high turbidity sludge water is mainly manifested as a flocculation process, which makes the sludge that already has a certain settling speed sink at a faster speed


    Further research using PAM and CPF showed that PAM improved the sludge dewatering performance better than CPF under the same dosage, but the effect of reducing the turbidity of the supernatant and reducing the volume of sludge was obviously not as good as that of CPF
    .


    The sludge treated by CPF has good concentration performance and can reduce the volume in a short time, thereby reducing the size of the thickening structure and the working load of the dewatering machine


     

     

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