【摘要】 采用四组分分离法将大庆原油分离成饱和分、芳香分、胶质和沥青质,用红外光谱、相对分子质量和元素分析等方法分析其结构组成,考察了化学结构与界面性质之间的关系。结果表明,大庆原油含饱和分最多,含氧官能团的羧酸类或酚类较多的胶质界面活性最大;相对分子质量较大的沥青质、胶质对油水界面膜的形成和稳定起决定作用;芳香分是油滴表面Zeta电位负值最大的组分。更多还原

【Abstract】 Daqing crude oil was separated into saturate,aromatic,resin and asphaltine with separation of four fractions method.The components and structures of the fractions were investigated by FT-IR,VPO molecular weight,and elementary composition.The relation of fractions chemical structures and interfacial properties was studied.The results showed that saturate was the most component in Daqing crude oil.The highest interfacial activity was resin,which contained considerable amount of compounds containing oxygen functional groups.The relative molecular weights of asphaltene and resin were major,so they had key effect on formation and stability of the interfacial membrane.The negative Zeta potential of aromatic was the maximal in the four fractions.更多还原