季铵盐离子液体催化α-烯烃聚合的研究

Research onα⁃olefin polymerization over quaternary ammonium salt ionic liquid catalyst

以三甲胺盐酸盐和AlCl3为原料合成不同摩尔比的离子液体催化剂,测试了不同反应条件对1-癸烯齐聚产物性能的影响,采用GPC(高温凝胶色谱)和FT-IR(傅里叶红外光谱)对齐聚物进行测试。结果表明,在n(三甲胺盐酸盐)∶n(氯化铝)=1∶2.5、聚合温度为90℃、用量为5%、时间为6 h的反应条件下,得到的1-癸烯齐聚物在40℃和100℃的运动黏度分别为59.67 mm^(2)/s和10.62 mm^(2)/s,转化率为89.3%,凝点为-61.4℃,具有很好的低温流动性。当回收催化剂与新制催化剂的质量比为9∶1时,聚合产物的性能浮动较小,表明催化剂可重复使用,经济效益好。

Ionic liquid catalysts with different molar ratios are synthesized from trimethylamine hydrochloride and AlCl3,and used to test the impacts of different reaction conditions on the performance of 1⁃decene oligomerization products.GPC and FT⁃IR are utilized to characterize the products.The conditions are as follows:n(trimethylamine hydrochloride)∶n(AlCl3)=1∶2.5,1⁃decene polymerization happens at 90℃,the dosage of ionic liquid catalyst is 5%,and reaction lasts for 6 hours.The obtained oligomers have kinematic viscosities of 59.67 mm^(2)·s^(-1)and 10.62 mm^(2)·s^(-1)at 40℃and 100℃,respectively,with a conversion rate of 89.3%and a pour point of-61.4℃,exhibiting good low⁃temperature fluidity.When the catalyst that contains 90%of recovered catalyst and 10%of fresh catalyst is served in the oligomerization,the products remain a stable performance,indicating that the catalyst can be reused,and the economic benefit is good.