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Synthesis and Evaluation of Hydrophobically Starch - modified Cationic Flocculant

Li Ping Wan Lei Xu Xu (Department of Chemistry and Chemical Engineering School of Southwest Petroleum Institute , Chengdu 610500;Department of Business Administration School of Southwest Petroleum Institute, Chengdu ,610500;Southwest Branch Company of PetroChina,Chengdu ,610051)  
The reaction conditions for synthesizing hydrophobically starch - modified cationic flocculant St - AM -DMDAAC - BA graft copolymer with eerie ammonium nitrate as iniator were studied using orthogonal design, and the flocculating effect of graft copolymer was evaluated. The optimum reaction conditions were obtained as follows: the mass ratio of starch to monomers 1:3, the content of all monomers and iniator 40 % and 0.06 % ( based on the total reactants),the dosage of surfactant 26 g/L, reaction temperature 50℃ pH 4 - 5, reation time 3 h. The result showed that flocculant had good effect when dosage of the flocculant was 6 mg/L.
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