多支化原油破乳剂的制备及破乳性能研究

摘要

Starting from ethylenediamine and methacrylate,2.0G starburst dendrimers were synthesized by twice Michael reaction and amidation.The starburst dendrimers were then grafted by reaction of epoxy ethane/epoxypropane co-polyether with hydroxyl value of 60 mgKOH/g and epoxy chloropropane,a chain extender,to prepare a new type of multi-branched demulsifier.The 2.0G starburst dendrimers were characterized by IR and potentiometric titration.The demulsifier were characterized by IR and the demulsification performance was evaluated.The demulsification results for a simulated crude oil emulsion of PL19-3 WHPD platform show that the dehydration ratio can reach 90% at 50 ℃,dosage of demulsifier 90 mg/L and dehydration time 30 min.Compared with the existing demulsifier under simulated field conditions,the new demulsifier exhibits a better performance.The oil content in the separated water is 20.3 mg/L,and the water content in the oil is below 0.5%.%以乙二胺和丙烯酸甲酯为原料,采用逐代分步合成法合成2.0G树枝状底物,再通过环氧氯丙烷与羟值为60 mgKOH/g的环氧乙烷环氧丙烷嵌段聚醚进行扩链,制备一种新型多支化原油破乳剂.对合成的2.0G树枝状底物及破乳剂产品采用红外及电位滴定方法进行结构表征,并对破乳剂产品进行破乳性能研究.结果表明:针对PL19-3 WHPD平台模拟原油乳液,在温度为50 ℃、所制备破乳剂投加量为90 mg/L、脱水时间为30 min时脱水率可达90%以上;模拟现场条件,与现场在用破乳剂相比,所制备破乳剂表现出更为优异的破乳性能,经处理后的脱出水中油的质量浓度为 20.3 mg/L,油中水的质量分数为不大于0.5%.