Molecular characterization of nickel and vanadium nonporphyrin compounds found in heavy crude petroleums and bitumens

Conference · Sat Nov 01 04:00:00 EST 1986

OSTI ID:6678025

Fish, R H; Reynolds, J G; Gallegos, E J

Pyridine/water extracts of selected crude petroleums were separated by polarity on a high performance liquid chromatography (HPLC) octadecylsilane column (ODS) into three fractions; low, moderate, and high polar. The moderate and low polar fractions were examined by electron impact mass spectroscopy (EIMS) to elucidate structural and behavioral characteristics of vanadyl petroporphyrin and metallo-nonporphyrin compounds. The EIMS results indicated vanadyl petroporphyrins in Cerro Negro and Wilmington moderate polar fractions and possibly in the Wilmington low polar fraction. These EIMS results showed the presence of petroporphyrins in the above-mentioned fractions, but no discrete information about the metallo-nonporphyrins. A highly polar nickel fraction from a Wilmington crude petroleum pyridine/water extract, separated on the ODS column, was further purified on a cyano normal phase column. This fraction had a nickel concentration of approximately 15,000 wppM, and was examined by EIMS mass spectroscopy. The spectral results indicated several homologous series structures possible for the binding sites of nickel. Further examination of the same fraction by positive ion fast atom bombardment mass spectroscopy, using a metal ion exchange technique, showed a substantially simplified spectrum and indicated the possibility of the nickel binding sites being small molecular weight naphthenic (carboxylic) acid salts. Gilsonite, a bitumen, was analyzed by reversed-phase HPLC with graphite furnace atomic absorption element specific detection, which indicated that the nickel is predominantly bound as metallopetroporphyrin, while a small portion eluted as a highly polar metallo-nonporphyrin fraction. These results are important in the identification of nonporphyrin metal-containing compounds in heavy crude petroleums and residua and could be beneficial for future petroleum exploration as metallobiomarkers. 21 refs., 11 figs.

• Research Organization: Lawrence Berkeley Lab., CA (USA); Chevron Research Co., Richmond, CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6678025
• Report Number(s): LBL-21330; CONF-860425-41; ON: DE87007179
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
AZINES
BIOLOGICAL MARKERS
BITUMENS
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COMPLEXES
DATA
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
EXPLORATION
EXTRACTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
LIQUID COLUMN CHROMATOGRAPHY
MASS SPECTROSCOPY
METALS
MINERAL RESOURCES
NICKEL
NICKEL COMPLEXES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DEPOSITS
PETROLEUM FRACTIONS
PORPHYRINS
PYRIDINES
RESOURCES
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
TAR
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
VANADIUM
VANADIUM COMPLEXES
WATER