响应面法优化阳离子聚丙烯酰胺絮凝剂的制备条件

Optimization of preparation conditions of cationic polyacrylamide flocculant by response surface methodology

采用丙烯酰氧乙基三甲基氯化铵(DAC)与丙烯酰胺(AM)为原料,以叔丁基过氧化氢和焦亚硫酸钠为引发剂,通过水溶液聚合法合成阳离子聚丙烯酰胺絮凝剂P(DAC-AM).以絮凝剂对油田模拟废水浊度去除率为指标,探讨DAC与AM摩尔比、反应温度、反应时间及引发剂用量对絮凝效果的影响,通过响应面法优化的阳离子聚丙烯酰胺絮凝剂P(DAC-AM)最佳合成条件为:n(DAC)∶n(AM)为2.11∶1,反应温度59.8℃,反应时间7h,引发剂用量0.022mol/L.在此条件下,絮凝剂对模拟废水浊度去除率为91.4%.

Cationic polyacrylamide flocculant P(DAC-AM)was synthesized by aqueous solution polymerization using acryloyl oxyethyl trimethyl ammonium chloride(DAC)and acrylamide(AM)as raw materials.Meanwhile,the synthesis reaction was initiated with tert buty hydroperoxide and focal sulfite sodium.The influences of the molar ratio of acryloyl oxyethyl trimethyl ammonium chloride(DAC)and acrylamide(AM),reaction temperature,reaction time and initiator dosage on flocculation effects to the oilfield simulated wastewater were investigated.The synthesis conditions of P(DAC-AM)were optimized by response surface methodology,and the optimum conditions were as follows:the molar ratio of DAC and AM of 2.11∶1,reaction temperature of 59.77℃,reaction time of 7 h,and initiator dosage of 0.022 mol/L.Under these conditions,the turbidity removal rate was 91.4%.