Synthesis of oligomeric models of coal derived materials for use with GPC calibration. Quarterly report, October-December 1983

Technical Report · Wed Feb 01 04:00:00 EST 1984

DOI:https://doi.org/10.2172/5267166· OSTI ID:5267166

Baltisberger, R. J.; Jones, M. B.

The purpose of this study was to develop a set of Gel Permeation Chromatography (GPC) calibration standards for asphaltene and preasphaltene analysis. A series of oligo(aryl ether) and oligo(arylmethylenes) from 170 to 580 g/mole were prepared via modified Ullmann-type reactions (ethers) and condensation of an aryl lithium derivative with an aryl carboxaldehyde, followed by reduction of the resulting carbonol (methylenes). These compounds were examined as molecular weight calibration standards for GPC analysis. A nearly linear plot was found to exist between the logarithm of molecular weight times mol fraction hydrogen versus retention volume with THF as the solvent. Further this plot was coincident with commercial polystyrene standards (600 to 2000 g/mol) and with the majority of our lignite derived asphaltenes and preasphaltenes. Work in our laboratory suggests that universal calibration plots for GPC analysis of lignite-derived preasphaltene and asphaltene liquefaction products are possible for determining number and weighted average molecular weight values. Universal calibration plots based on the logarithm of the hydrodynamic volume, number average molecular weight times hydrogen content, result in a smooth curve coincident with polystyrene standards, model compounds, and lignite derived asphaltenes/preasphaltenes. The data which supports the above hypothesis is presently limited and has only been measured for lignite-derived materials. 18 references, 6 figures.

• Research Organization: North Dakota Univ., Grand Forks (USA)
• DOE Contract Number: FG22-81PC40810
• OSTI ID: 5267166
• Report Number(s): DOE/PC/40810-8; ON: DE84007393
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ASPHALTENES
ASPHALTS
BITUMENS
CALIBRATION
CALIBRATION STANDARDS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
DATA
EXPERIMENTAL DATA
FLUIDS
GEL PERMEATION CHROMATOGRAPHY
INFORMATION
LIQUEFACTION
LIQUIDS
MOLECULAR WEIGHT
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
SEPARATION PROCESSES
STANDARDS
SYNTHESIS
TAR
THERMOCHEMICAL PROCESSES