【摘要】 采用硅胶-氧化铝双吸附剂柱色谱法,将欢喜岭、羊三木以及大庆原油的减压馏分(350～400℃、400～450℃、450～500℃)分离为饱和烃组分、轻芳烃、中芳烃、重芳烃及胶质五个组分;并测定其元素组成、平均分子量及核磁共振波谱。用改进的 B—L 法计算所得的芳香碳率 f_A 等结构参数,与用经典的 n-d-M 法测得的结果基本相符。同时,对减压馏分的化学组成、结构与其凝点的关系也进行了考察。更多还原

【Abstract】 The vacuum distillates(350—400℃,400—450℃,450—500℃)of Huanxili-ng,Yangsanmu and Daqing crude oils were each separated into five fractions, i.e.saturate,light-,middle-,heavy-aromatlcs and resin,by elution chromato-graphy with alumina and silica as adsorbents.The elemental composition,ave-rage molecular weight and ~1H-NMR spectra of each fraction were obtained.The results show that the structural parameters calculated with Brown-Ladn-er’s method are very close to that from n-d-M method.The relationship bet-ween the chemical structure and the pour point of the vacuum distillates hasalso been examined.更多还原