【摘要】 以环氧氯丙烷(E)、二乙胺(F)和乙二胺(D)为原料合成有机阳离子絮凝剂PEFD,对其电荷密度、特性粘度以及絮凝性能进行测试,并采用红外光谱对其结构进行表征。PEFD絮凝剂的最佳合成条件为:nF/nD=8.82,采用E缓慢滴入(F+D)的加料方式,反应温度50℃,反应时间3h。在加药量为10mg/L时,PEFD絮凝剂的浊度去除率为92.72%,明显优于商品聚丙烯酰胺类絮凝剂。更多还原

【Abstract】 An organic cationic flocculant(PEFD)containing quaternary ammonium ion was synthesized using epichlorohydrin(E),diethylamine(F)and 1,2-diaminoethane(D)as raw materials.The intrinsic viscosity,charge density and turbidity removal rate of PEFD were determined and its structure was characterized by FT-IR.Test results showed that the optimum PEFD synthesis conditions were mixing F and D with a ratio of n F/n D=8.82,then slowly adding E into the mixture of(F+D),reacting at 50 ℃ for 3 h.Using the obtained PEFD as flocculant at a dosage of 10 mg/L,the removal rate of turbidity reached 92.72%,which was much better than that of using commercial polyacrylamide flocculants.更多还原