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降凝剂对原油的降凝减粘效果受其分子结构、使用剂量、活化温度及所受剪切强度的影响 ,并与原油的品质 (如 :蜡含量、胶质含量、碳数分布及组成等 )有着密切的关系 .为研制出适合大庆原油品质的降凝剂 ,合成了以苯乙烯 -马来酸酐共聚物 (SMA)的酯化物为主体的酯型降凝剂 (HJN -5#) ,并对其使用剂量、活化温度等参数进行了研究 ,还根据观察到的降凝剂使用前后原油中蜡晶形态的变化对降凝减粘作用机理进行了讨论 .结果表明 ,添加质量百分数为 0 .2 %的HJN -5#,可使大庆原油的倾点下降 50 % ,表观粘度下降 90 %以上 ,最佳活化温度为 88℃ .
The effect of pour point depressant on the condensation and viscosity reduction of crude oil is affected by its molecular structure, dosage, activation temperature and shear strength, and is related to the quality of crude oil (such as wax content, glial content, carbon number distribution and composition Etc. In order to develop a pour point depressant suitable for the quality of Daqing crude oil, an ester type pour point depressant (HJN -5 #) mainly composed of an esterified product of styrene-maleic anhydride copolymer (SMA) was synthesized, , And the dosage, activation temperature and other parameters were studied, and the mechanism of pour point depressing and viscosity reduction was also discussed according to the changes of wax crystal morphology in the crude oil before and after the observed pour point depressant was used.The results showed that the mass percentage 0 .2% HJN -5 #, Daqing crude oil pour point can be reduced by 50%, the apparent viscosity decreased by 90%, the best activation temperature is 88 ℃.