【摘要】 本文研究了五个国产重质油和沥青样品的族组份和其结构。采用溶剂萃取和液体色谱结合的分离流程,将样品分成饱和烃和各种芳香馏份F₂、F₃,F₄以及苯可溶沥青质等馏份。根据红外光谱1380、2920cm^-1特征峰之吸光度和有关公式算出C_?,从而较准确地估算出X值。在此基础上结合¹H-NMR、VPO分子量和元素分析等有关数据,求得五个油样中的11个馏份的平均结构参数和相应的平均分子结构模型。更多还原

【Abstract】 By the use of solvent extraction and liquid chromatography for separation and followed by combined ¹H-NMR-IR spectroscopy, the average molecular structures of separated fractions of some domestic petroleum heavy residues have been studied.Taking the absorption E₁₃₈₀cm^-1 and E₂₉₂₀cm^-1 from the IR spectra and the empirical equations proposed by Yen and Haley, the H_CH3, H_CH2 and corresponding C_CH3 , C_CH2 were calculated.The more accurate value of X might be approximately estimated therefrom. On this basis, the average structural parameters of various generic fractions were obtained by generally accepted Williams and Brown-Ladner equations and the average molecular structural models of these fractions were designed.The consistency between the structural parameters of combined ¹H-NMR-IR method and the Densimetric method by van Krevelen shew that the densimetric statistical method remains a simple and accessible method for structural analysis, but more information can be got from ¹H-NMR -IR method.更多还原