Separation and characterization of Synthoil asphaltene by gel-permeation chromatography and proton nuclear magnetic resonance spectrometry

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac50047a045· OSTI ID:5864088

Schwager, I; Kwan, J T; Lee, W C; Meng, S; Yen, T F

Synthoil has been fractionated on a preparative scale by gel-permeation chromatography on styrene-divinyl benzene packing (Bio-Beads S-X8). Five fractions were eluted in the order of high to low molecular weights: 3.2 +- 1.0 wt %, anti M/sub n/ = 1280; 31.6 +- 1.7 wt %, anti M/sub n/ = 964 +- 3; 32 +- 2.1 wt %, anti M/sub n/ = 515 +- 12; 20.5 +- 1.1 wt %, anti M/sub n/ = 413 +- 4; 12.7 +- 1.8 wt %, anti M/sub n/ = 359 +- 11. Aromatic molecules with large saturated substituents elute before smaller, more aromatic molecules. Structural characterization of the fractions was carried out using a modified Brown-Ladner proton nuclear magnetic resonance analysis. A plot of molecular weight vs elution volumes for standards, and Synthoil coal liquid fractions affords a relatively smooth curve which may be used to determine approximate molecular weights of coal liquid products. 3 figures, 2 tables.

• Research Organization: Univ. of Southern California, Los Angeles
• OSTI ID: 5864088
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 51:11; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL REACTION YIELD
CHROMATOGRAPHY
COAL LIQUIDS
DATA
DATA FORMS
DISSOLUTION
EXPERIMENTAL DATA
FRACTIONATION
FUELS
HYDROCARBONS
INFORMATION
ISOLATED VALUES
LEACHING
MAGNETIC RESONANCE
MOLECULAR WEIGHT
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RESONANCE
SEPARATION PROCESSES
STRUCTURAL CHEMICAL ANALYSIS
STYRENE
SYNTHETIC FUELS
TAR
YIELDS