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NMR (Nuclear Magnetic Resonance) And GC/MS (Gas Chromatography/Mass Spectrometry) Investigation of the Saturate and Distillate Fractions from the Cerro Negro Heavy Petroleum Crude

机译：核磁共振（核磁共振）和GC / ms（气相色谱/质谱）研究Cerro Negro重质石油原油的饱和馏分和馏分

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Six fractions of the Cerro Negro heavy petroleum crude have been evaluated using nuclear magnetic resonance spectroscopy (NMR) and gas chromatography/mass spectrometry (GC/MS). The fractions include four saturated hydrocarbon distillate fractions distilling above 200 sup 0 C (200 to 425 sup 0 C (392 to 797 sup 0 F), 425 to 550 sup 0 C (797 to 1022 sup 0 F), 550 to 700 sup 0 C (1022 to 1292 sup 0 F), and >700 sup 0 C (>1292 sup 0 F)) and two distillate subfractions designated as <200 sup 0 C and >200 sup 0 C. The >700 sup 0 C and 550 to 700 sup 0 C saturated hydrocarbon fractions are not suited for analyses by combined GC/MS because their distillation ranges are higher than the upper limit of material that will elute from the gas chromatographic column. The sup 1 H and sup 13 C NMR spectral data for the 550 to 700 sup 0 C and >700 sup 0 C fractions indicate that normal and branched alkanes with an average carbon chainlength of C sub 10 are present but must be bonded to a larger molecular moiety based upon mass spectral evidence and boiling point considerations. Normal and branched alkanes were not detected in either 200 to 425 sup 0 C or 425 to 550 sup 0 C samples at concentrations of 0.01% by weight. NMR data for the 200 to 425 sup 0 C fraction give no indication of normal alkanes with C chainlengths >9. Branched alkanes possibly of the isoprenoid-like structure are present. The average molecular structural representation is an alkyl-substituted dicyclic alkane. Average molecular structural representation for the 425 to 550 sup 0 C fraction is also an alkyl-substituted dicyclic alkane. However, at least one of the alkyl substituents has a chainlength >10. Both normal and branched alkanes of C/sub 7-12/ were detected in the <200 sup 0 C subfraction. Alkanes of C/sub 12-31/ were in the >200 sup 0 C sample. sup 1 H and sup 13 C spectra for both subfractions indicate similar chemical composition. 12 refs., 6 figs., 8 tabs. (ERA citation 13:010813)

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作者
Netzel, D. A. ; Guffey, F. D.;
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年度 1987
页码 1-38
总页数 38
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Petroleum Distillates; Alkanes; Aromatics; Carbon 13; Comparative Evaluations; Cycloalkanes; Experimental Data; Gas Chromatography; Hydrogen 1; Mass Spectra; NMR Spectra; Nuclear Magnetic Resonance; Petroleum; Structural Chemical Analysis; Temperature Effects; Venezuela; Viscosity;

机译：石油馏分;烷烃;芳烃;碳13;对比评价;环烷烃;实验数据;气相色谱;氢1;质谱;核磁共振谱;核磁共振;石油;结构化学分析;温度效应;委内瑞拉;粘度;

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NMR (Nuclear Magnetic Resonance) And GC/MS (Gas Chromatography/Mass Spectrometry) Investigation of the Saturate and Distillate Fractions from the Cerro Negro Heavy Petroleum Crude

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