Study on relationship between the concentration of hydrocarbon groups in heavy oils and their structural parameter from 1H NMR spectra☆

More than 60 heavy oils samples, belonging to the hydrogen adding tail oil, catalytic oil slurry, catalytic heavy oil slurry and catalytic heavy tar waxy oil, which taken from different processing units in Nanjing Refinery, are analysed by 1H NMR and column chromatography. The analytical data of the heavy oils by two methods are compared and correlated, while good relationships between the specific area protonʹs percentage in 1H NMR spectra and the contents of paraffinic and alicyclic hydrocarbons ((P+N)%), aromatic hydrocarbons (A%) are found. Our 1H NMR method in calculating the amount of (P+N) and A in heavy oils proved fast, convenient and reliable.