中文摘要：

将大港常压渣油利用液相色谱法分成六个组分,测定了各组分的平均偶极矩。结果表明,渣油分子具有极性,饱和分和轻芳烃组分、重芳烃、轻胶质、中胶质、重胶质、沥青质的偶极矩依次增大,分别为1.19、2.88、3.79、4.92、6.36、11.70 Debye。元素分析表明,从饱和分和轻芳烃组分到沥青质组分,H/C原子比逐渐下降,表明H/C原子比减小与平均偶极矩增大有关;从饱和分和轻芳烃组分到沥青质组分,S/C、N/C原子比总体呈现上升趋势,渣油组分的杂原子含量与其极性有一定的关系,但两者并不完全一致,渣油组分分子的平均偶极矩还受到其他因素的影响。

英文摘要：

The mean dipole moments of Da-gang atmosphere residue（DG-AR） fractions were investigated.DG-AR can be partitioned into six fractions： saturates and light aromatics,heavy aromatics,light resins,middle resins,heavy resins,and asphaltenes.The mean dipole moments of these fractions are 1.19,2.88,3.79,4.92,6.36,and 11.70 Debye,respectively,which increase from saturates and light aromatics to asphaltenes.This result is consistent with the differences in solubility of solvents used in liquid chromatography separation.The contents of hydrogen,carbon,nitrogen,and sulfur in each fraction were also measured.Opposite to the polarity,the H/C atomic ratio of the residue fractions decreases from saturates and light aromatics to asphaltene. The ratio of S/C and N/C atomic ratio of the residue fractions vary in the same sequence of the mean dipole moment,which indicates that the hetero-atom content is a factor that influences residue polarity.