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- W271388513 abstract "Hydrogen (1H) and carbon (13C) high resolution nuclear magnetic resonance (NMR) spectroscopy, gas chromatography-mass spectroscopy (GC-MS), and high pressure liquid chromatography (HPLC) were used to determine the relative amounts of molecular functional groups in a series of narrow boiling range distillates from two crude oils. San Andres formation and Tensleep black oils were characterized. Spinning band distillation was used to generate fractions centered approximately on each successive normal paraffin. Each fraction spanned a range of about three- to four carbon numbers from C7 to C35. The heavy C35+ distillate residue was also studied. Quantitative HPLC separations were performed on each distillate to provide paraffin-naphthene (PN), one-ring aromatic (A1), two-ring aromatic (A2) and three-plus-ring aromatic (A3+) weight percentages. The total aromatic weight percentage was also determined based on NMR data and was observed to agreed closely with the HPLC results. The aromatic character of the San Andres formation oil and the paraffinic character of the Tensleep are clearly indicated in the spectroscopic and chromatographic results. The NMR data also provided such unique structural parameters as the total weight fraction of aromatic ring carbons, aromatic hydrogenated ring carbons, bridgehead aromatic ring carbons, methyl substituted ring carbons, other alkyl substituted aromatic ring carbons,more » and aromatic side chain carbons. Differences in these parameters were observed between the two oils across their boiling ranges providing unique characterization fingerprinting.« less" @default.
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- W271388513 date "1988-01-01" @default.
- W271388513 modified "2023-09-24" @default.
- W271388513 title "Nuclear magnetic resonance, mass spectroscopic, and chromatographic characterization of narrow boiling distillates from a San Andres formation crude oil and a light Tensleep oil" @default.
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