溶剂对抽提所得油砂沥青中沥青质结构的影响  

Influence of Organic Solvents on Structure of Extracted Asphaltene from Tar Sands

作　　者：孙昱东[1] 周琼 赵凌云 

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580

出　　处：《西安石油大学学报（自然科学版）》2016年第4期98-102,126,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金项目(编号:21376266)

摘　　要：分别采用甲苯、环己烷和石油醚抽提处理油砂,对所得油砂沥青中的沥青质进行元素分析、平均相对分子质量测定及13C-NMR分析,结合分析结果,采用Chemwindow软件推测并绘制出沥青质的平均结构单元模型。研究结果表明,不同溶剂抽提得到的沥青质结构明显不同,虽然各溶剂所得沥青质的脂肪碳含量相差不大,芳香碳的含量也只是略有差异,但分子的不饱和性相差较大,表明沥青质的结构差别较大。此外,沥青质中杂原子的含量、平均相对分子质量的大小也有较大差别。Tar sands were extracted by toluene, cyclohexane,petroleum ether separately, and then the asphahenes obtained from the tar sands were analyzed by elemental analysis, average relative molecular mass determination and 13 C-NMR. The average structure of the asphaltenes was estimated with ehemwindow software based on the analysis results. The research results show that the structure of the asphaltenes extracted by different solvents is obviously different. Although there is a small difference in the content of alkyl carbon and aromatic carbon in the asphaltene molecule obtained with three solvents, there is a great difference in the molecule unsaturation of three asphaltenes,which shows that there is a great difference in the structure Of three asphahenes. In addition,there is a great difference in the heteroatom content and the average relative molecular mass of three asphaltenes.

关 键 词：油砂沥青 沥青质 平均结构 有机溶剂 核磁共振 

分 类 号：TE622.1[石油与天然气工程—油气加工工程]