Composite high polymer flocculant for coking wastewater and preparation method thereof
A technology of polymer flocculant and coking wastewater, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effects of less secondary pollution, less water content, and longer molecular chains
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example example 1
[0014] Example Example 1: Weigh a certain amount of cationic starch aqueous solution with a mass fraction of 40%, heat it to 75 ° C, gelatinize for 0.4 h, cool down to 35 ° C, and then add acrylamide monomer that accounts for 30% of the mass fraction of the cationic starch aqueous solution. , the initiator ceric ammonium nitrate with a mass fraction of 0.003%, at a temperature of 40 ° C, after the reaction for 0.8 h, cooled to room temperature, precipitated and washed the initial product with ethanol, and then filtered with a Buchner funnel. The cationic starch-polyacrylamide graft copolymer was obtained after vacuum drying at 60°C. Then, an aqueous solution of cationic starch-polyacrylamide graft copolymer with a mass fraction of 2% was prepared, and 0.2% of polymerized ferric sulfate and 0.2% of polymerized ferric chloride were added. After fully stirring, a composite type was obtained. Polymer flocculants. When 1000ml of coking wastewater was treated with 5ml of composite ...
example example 2
[0015] Example Example 2: Weigh a certain amount of anionic starch aqueous solution with a mass fraction of 45%, heat it to 80 ° C, gelatinize for 0.4 h, cool down to 40 ° C, and then add acrylic acid monomer that accounts for 30% of the mass fraction of the cationic starch aqueous solution, The initiator potassium persulfate with a mass fraction of 0.005% was reacted at 50 °C for 1 h, cooled to room temperature, precipitated with ethanol and washed the initial product, and then filtered with a Buchner funnel and washed 3 times. After vacuum drying at 60°C, anionic starch-polyacrylic acid graft copolymer was obtained. Then, an aqueous solution of anionic starch-polyacrylic acid graft copolymer with a mass fraction of 3% was prepared, and 0.1% of polymerized iron sulfate and 0.4% of polymerized iron silicate were added. Molecular flocculants. The 7ml composite polymer flocculant prepared above was used to treat 1000ml of coking wastewater, and the COD removal rate in the cokin...
example example 3
[0016] Example 3: Weigh a certain amount of amphoteric starch aqueous solution with a mass fraction of 50%, heat it to 80 ° C, gelatinize for 0.6 h, cool down to 45 ° C, and then add methylene propylene accounting for 30% of the mass fraction of the cationic starch aqueous solution Amide monomer, ammonium persulfate initiator with mass fraction of 0.006%, reacted at 60 °C for 1.5 hours, cooled to room temperature, precipitated and washed the initial product with ethanol, then filtered with a Buchner funnel and washed 4 times repeatedly , the precipitate was vacuum dried at 65°C to obtain cationic starch-polyacrylamide graft copolymer. Then prepare an aqueous solution of amphoteric starch-polymethylene acrylamide graft copolymer with a mass fraction of 3%, add 0.1% polymer ferrous sulfate and 0.4% polymer ferrous chloride, and stir well. Then, a composite polymer flocculant is obtained. The 10ml composite polymer flocculant prepared above was used to treat 1000ml of coking was...
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