摘要
以紫外吸收光谱理论为基础 ,通过剖析胜利渣油中胶质、沥青质的紫外吸收光谱及其二阶导数光谱 ,并与模型化合物的紫外吸收特征相比较 ,研究胶质和沥青质的化学结构。实验结果表明 ,芳香单片为胜利渣油中胶质、沥青质组分结构的最基本单位。胶质、沥青质的芳香单元结构———基本吸收生色团具有相似性 ,单元芳香片中芳香环数以 3～ 4个环为主 ,共轭芳香环的排列形式主要为“线性排列” ,即渺位缩合。但胶质和沥青质的结构也存在着差异 ,即胶质中基本不含有多于 5个环的共轭芳香片 ,而沥青质中含有少量多于 5个环的共轭芳香片 ,并且这些共轭芳香片有部分“面性排列” ,即迫位缩合 ,同时沥青质中的芳香结构所占比例较大。
The U. V. absorption spectra and second derivative spectra of resins and asphaltenes in Shengli residue were analyzed and compared with those of model compounds based on theory to study their chemical structure. The results indicated that aromatic sheet is the basic unit in structure. The structures of resins and asphaltenes have similarity. The conjugated aromatic rings in unit sheet are mainly three rings or four rings, whose connection is 'linear order', namely cata-condensed. The difference between asphaltenes and resins is that resins have mainly less than five aromatic rings in conjugated aromatic unit and asphaltenes have more than five aromatic rings. The asphaltenes have more conjugated aromatic units than the resins and their aromatic rings are 'plane order', namely peri - condensed. Approximate structure model of resins and asphaltenes was obtained by experiment.
出处
《石油化工高等学校学报》
EI
CAS
2001年第3期14-17,共4页
Journal of Petrochemical Universities
