Composition of asphaltenes from coal liquids

Conference · Mon Jan 01 04:00:00 EST 1979 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:6377741

Aczel, T; Williams, R B; Chamberlain, N F; Lumpkin, H E

The composition of asphaltenes from coal liquids, including a Clearfield, Pa., coal extract, a Synthoil liquid, and a light distillate from Exxon Donor Solvent (EDS) liquefaction, isolated by solvent extraction with benzene and subsequent precipitation with cyclohexane, was studied by high-resolution mass-spectroscopy, proton NMR, IR, and other techniques. A total of 1269 individual hydrocarbons and heterocompounds in 30 ppm to 2 3< concentrations, members of 234 homologous series (C/sub 6/-C/sub 30/), were identified in the light EDS asphaltene fraction. Volatilized asphaltene compounds from the EDS distillate were unexpectedly similar to those generally found in pentane- or cyclohexane-soluble coal liquid extracts. The molecules contained only one structural unit in most cases, but heavier molecules contained 1-3 such units, which are two- to eight-ring aromatic hydrocarbons associated with 1-3 functional groups and/or naphthanic rings and short side-chains. The most abundant components were those with two, one, and three oxygen atoms per molecule and hydrocarbons in decreasing order. Only 30-50 % of the organic oxygen was in the hydroxyl form, with significant concentrations of ether bridges and furan rings. Acids and amides were found only in the asphaltanes from coal extracts.

• Research Organization: Exxon Res. Eng. Co.
• OSTI ID: 6377741
• Report Number(s): CONF-790917-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 24:4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
&amp; Peat-- Hydrogenation &amp; Liquefaction
010407 -- Coal &amp; Coal Products-- Solvent Extraction-- (-1987)
010600* -- Coal
Lignite
&amp; Peat-- Properties &amp; Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
AMIDES
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
COAL EXTRACTS
COAL LIQUEFACTION
COAL LIQUIDS
DATA
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
EXXON LIQUEFACTION PROCESS
FLUIDS
HYDROGEN
INFORMATION
INFRARED SPECTRA
LIQUEFACTION
LIQUIDS
MAGNETIC RESONANCE
MASS SPECTROSCOPY
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
RESONANCE
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTRA
SPECTROSCOPY
SYNTHOIL PROCESS
TAR
THERMOCHEMICAL PROCESSES