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Modified melamine formaldehyde flocculant
Time of Update: 2021-10-21
(1) Preparation of melamine formaldehyde resinFirst add water and raw material melamine into a three-necked flask, adjust the pH of the reaction system to 8.
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Application of acrylamide-dimethyldiallylammonium chloride copolymer
Time of Update: 2021-10-21
[Application] Chen Weizhong and others used dimethyldiallylammonium chloride and acrylamide monomers as raw materials to prepare
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Acrylamide-(2-methacryloyloxyethyl)trimethylammonium chloride copolymer
Time of Update: 2021-10-21
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
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Preparation method of modified urea-formaldehyde resin quaternary ammonium salt
Time of Update: 2021-10-21
The molar ratio of formaldehyde, urea, and epichlorohydrin is 2:1 : 0.
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Preparation method of poly-N-dimethylaminomethacrylamide
Time of Update: 2021-10-21
Poly-N-dimethylaminomethacrylamide>[Preparation method] Poly-N-dimethylaminomethacrylamide is mainly prepared by the Mannich reaction method using the active
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Preparation method of sulfomethylated polyacrylamide and poly-N-diphosphonyl methacrylamide
Time of Update: 2021-10-21
0h, add 37%-40% formaldehyde to the above viscous system The solution and H3PO3 react with acid catalyzed reaction at 25～65℃ for 4～6h .
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Preparation method of poly-2-vinylimidazoline
Time of Update: 2021-10-21
(2) Synthesis of ethylenediamine and polyacrylonitrileThis method can use waste polyacrylonitrile fiber to obtain poly-2-vinylimidazoline .
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Sodium methacrylate-2-acrylamido-2-methyl propane sulfonate copolymer
Time of Update: 2021-10-21
After 60 minutes, the system solution began to become viscous, the temperature was raised to 50°C, and the reaction was continued at 48-52°C for 72 hours to obtain sodium methacrylate-2-acrylamido-2-methylpropanesulfonate sodium copolymer.
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Sodium acrylate-2-acrylamido-2-methyl propane sulfonate copolymer
Time of Update: 2021-10-21
0mol/L NaNO 3 solution, the intrinsic viscosity of the 15% sodium acrylate-2 acrylamido-2-methylpropanesulfonate copolymer solution with a mass fraction of 15% is 1.
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Physicochemical properties and preparation method of polydimethyldiallylammonium chloride (PDMDAAC) (1)
Time of Update: 2021-10-21
The use of organic solvent two-liquid phase reaction can effectively inhibit the volatilization and self-polymerization of allyl chloride, and can easily separate the intermediate products, avoiding the time-consuming, volatilization loss, high-temperature self-polymerization and residues caused by distillation separation.
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Preparation method of polymethacryloxyethyl trimethylammonium chloride and polydimethylaminoethyl methacrylate (PDMAEMA)
Time of Update: 2021-10-21
also used aqueous solution polymerization to prepare polymethacryloxyethyltrimethylammonium chloride, and studied the effects of monomer purity, monomer mass concentration, polymerization temperature, and initiator dosage on polymer molecular weight .
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Preparation method of hydrolyzed polyacrylamide
Time of Update: 2021-10-21
[Preparation method] After polymerization of acrylamide monomer, adding alkali hydrolysis is a traditional process
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Polyacrylamide (PAM) preparation method-inverse microemulsion polymerization
Time of Update: 2021-10-21
monomer and the desalinated water into the batching kettle, and configure the acrylamide monomer aqueous solution with a fixed mass concentration . The prepared emulsifier and oil phase are measured
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Physicochemical properties and preparation method of polydimethyldiallylammonium chloride (PDMDAAC) (2)
Time of Update: 2021-10-21
(2) Inverse emulsion polymerization>The specific process for preparing polydimethyldiallylammonium chloride by inverse emulsion polymerization is as follows
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Acrylamide-acrylic acid (salt) copolymer
Time of Update: 2021-10-21
used potassium persulfate/urea initiation system to prepare acrylamide sodium acrylate copolymer by aqueous solution polymerization, and systematically studied the relationship between copolymerized intrinsic viscosity, monomer conversion rate and various process parameters .
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Preparation method of polysilicate ferric sulfate (PFSS)
Time of Update: 2021-10-21
, and aging for a certain period of time to obtain polysilicate sulfuric acid Iron . >Preparation method The synthesis of poly-iron coagulant incorporating silicon <br
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The physicochemical properties and preparation method of sodium polyacrylate (PANa)
Time of Update: 2021-10-21
In order to prepare polyacrylate sodium (PANa) with high relative molecular mass, the initiator of the redox system is used, and the reaction is carried out at the temperature of 30℃, 35℃, 40℃, 45℃, 50℃, 55℃ and 60℃ respectively.
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Polyvinyl alcohol (PVA) preparation method
Time of Update: 2021-10-21
Therefore, the preparation of polyvinyl alcohol is divided into three steps: ①Polyvinyl acetate is polymerized by vinyl acetate; ②Polyvinyl alcohol is produced by alcoholysis of polyvinyl acetate; ③Acetic acid and methanol are recovered .
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Poly-N-dimethylaminomethacrylamide emulsion
Time of Update: 2021-10-21
Poly-N-dimethylaminomethacrylamide emulsion>[Preparation method] The preparation of poly-N-dimethylaminomethacrylamide emulsion mainly utilizes
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Condensation type flocculant
Time of Update: 2021-10-21
resin-containing and surfactant-containing wastewater, and it also has a good flocculation and sedimentation effect when the pH is neutral or acidic . >Related link: Preparation method of polyvinyl alcohol (PVA)> > >>
