高凝点原油降凝剂的研制与复配

Preparation of a Composite Pour Point Depressant for High Crud Oil

在甲苯溶剂中引发聚合,由物质的量比6:1:2的丙烯酸十八酯、马来酸酐、苯乙烯合成降凝剂A,由物质的量比为6:1:2的丙烯酸十八酰胺、马来酸酐、苯乙烯合成降凝剂B。在甲苯溶剂中,120℃条件下用十八胺和十八醇分别对降凝剂A,B进行醇解和胺解合成降凝剂C和D。以大庆原油为样本考察了A,B,C,D的降凝和降粘效果。在大庆原油中加入质量分数0.5%的降凝剂进行测试,结果表明降凝剂C,D在降凝和降粘上都优于降凝剂A,B。复配性降凝剂C+D在降凝和降粘效果上高于降凝剂C,D。降凝剂C+D的复配质量比为3:1时,可使大庆原油凝点降低15℃,粘度降低58.38%。

By the way of initiated polymerization in toluene solution, two tercopolymers were prepared from octadecyl acrylate （acrylamide）, maleic anhydride and styrolene in molar ratio 6 ： 1 ： 2 as pour point depressant A（B）, C（D）, a kind of pour point depressant, was synthesized by alcoholysis （aminolysis） of A（B） by stearyl alcohol（oetadecylamine） in the toluene as solvent at 120 ℃. The drop effect of pour point and viscosity of A, B, C and D for the sample to Daqing crude oil was investigated. The study was tested by adding the pour point depressants A,B,C,D to high pour point crude oil of Daqing at a dosage of 0.5%, respectively. The results suggest that the pour point depressants of C ＆- D are more effective than A ＆ B, meanwhile, the combination C＆ D is more effective than C and D. After adding C＋D in mass ratio 3 ：1 to Daqing crude oil, its pour point is lowered by 15 ℃ and viscosity could be reduced bv 58.38%.