高凝点原油降凝剂的研制与复配

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％。

Preparation of a Composite Pour Point Depressant for High Crud Oil

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(octadecylamine) 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 C and viscosity could be reduced by 58.38%.