Characterization of different molecular weight fractions separated from Utah maltenes by gel permeation chromatography

Journal Article · Thu Feb 01 00:00:00 EST 1990 · Fuel Science and Technology International; (USA)

DOI:https://doi.org/10.1080/08843759008915920· OSTI ID:7014247

Woods, J R; Kotlyar, L S; Montgomery, D S; Sparks, B D; Ripmeester, J A ^[1]

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1. National Research Council of Canada, Div. of Chemistry, M-12, Montreal Road, Ottawa, Ontario K1A 0R9 (CA)

Maltenes derived from Utah bitumens were separated by gel permeation chromatography (GPC) into fractions having number average molecular weights (MW) in the range from 300 to 11985. The fractions were examined by vapor pressure osmometry, absorption spectrometry in the visible region as well as proton and carbon-13 NMR. The results are reported in comparison with those for the corresponding fractions separated from Athabasc maltenes. Utah fractions appeared to be more aliphatic with longer average aliphatic chains lengths. Branched and alicyclic types were more abundant in Utah samples, especially those with low MW. There was an apparent difference in the hydrocarbon structure of both Utah and Athabasca maltenes GPC fractions at MW approximating 800. It is suggested that these rapid changes of hydrocarbon type with respect to MW provide a convenient means of dividing the maltenes into two classes which may be used to characterize the maltenes of heavy oils and bitumens derived from various sources. There was also an abrupt change in the correlation between the light absorbing parameter K{sub 530}/C and molecular weight for both Utah and Athabasca maltenes at MW approximating 800. This provides an alternative method of dividing the maltenes into two classes based on light absorption data that are sensitive to the presence of condensed aromatic systems and nitrogen containing functional groups.

• OSTI ID: 7014247
• Journal Information: Fuel Science and Technology International; (USA), Vol. 8:2; ISSN 0884-3759
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
04 OIL SHALES AND TAR SANDS
HYDROCARBONS
STRUCTURAL CHEMICAL ANALYSIS
PETROLEUM FRACTIONS
SEPARATION PROCESSES
ABSORPTION SPECTROSCOPY
ATHABASCA DEPOSIT
BITUMENS
CARBON 13
CHEMICAL COMPOSITION
GEL PERMEATION CHROMATOGRAPHY
MOLECULAR WEIGHT
NMR SPECTRA
PROTON SPECTRA
UTAH
CARBON ISOTOPES
CHROMATOGRAPHY
ENERGY SOURCES
EVEN-ODD NUCLEI
FEDERAL REGION VIII
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
ISOTOPES
LIGHT NUCLEI
NORTH AMERICA
NUCLEI
OIL SAND DEPOSITS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES
TAR
USA
020400* - Petroleum- Processing
023000 - Petroleum- Properties & Composition
040500 - Oil Shales & Tar Sands- Properties & Composition