多支化原油破乳剂的制备及破乳性能研究

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60mgKOH/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90mg/L、脱水时间为30min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20.3mg/L,油中水的质量分数为不大于0.5%。

PREPARATION AND DEMULSIFICATION PERFORMANCE OF MULTIBRANCHED DEMULSIFIER

Starting from ethylenediamine and methacrylate, 2.0 G 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%.