淤浆法制备烯烃类减阻剂

OLEFIN DRAG REDUCTION AGENT SYNTHESIZED BY SLURRY METHOD

在-10℃冷浴中,以一氯二乙基铝和四氯化钛为催化体系,以硅油为溶剂,采用淤浆法制备了减阻剂。在聚合完成后,以抽滤的方式将所得减阻剂悬浮液分离,得到聚α-烯烃粉末与硅油。采用机械搅拌将聚α-烯烃粉末与自制溶剂混合均匀,得到30%减阻剂悬浮液。考察了聚合时间、聚合温度、催化剂种类及用量、淤浆法溶剂种类对减阻率的影响。实验结果表明,优化的合成工艺条件为:聚合时间48 h、聚合温度-10℃、n(一氯二乙基铝)/n(四氯化钛)=60,在此条件下,减阻率最高为59.6%,硅油重复使用率达78.57%。

In a cold bath at-10℃,the drag reducer was prepared by slurry method with a catalytic system composed of diethyl aluminum chloride and titanium tetrachloride and silicone oil as solvent.After polymerization,the obtained drag reducer suspension is separated by suction filtration to obtain polyα-olefin powder and silicone oil.Polymerize with mechanical stirringα-olefin powder is evenly mixed with the self-made solvent to obtain a 30%drag reducer suspension.The effects of polymerization time,polymerization temperature,type and amount of catalyst and type of slurry solvent on drag reduction were investigated.The experimental results show that the optimized synthesis conditions are as follows:polymerization time 48 h,polymerization temperature-10℃,n(dichlorodiethylaluminum)/n(titanium tetrachloride)=60.Under these conditions,the highest drag reduction rate is 59.6%,and the reuse rate of silicone oil is 78.57%.