Development of an alternative S. A. R. A. method for the characterization of coal-derived liquids

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5368886

Lancas, F M; Karam, H S; McNair, H M

Compared with methods of characterization of coal extract described in the literature, the method we have developed has the following advantages: 1) extraction step: using THF (tetrahydrofuran) instead of hexane, pyridine, toluene, etc., gives more reproducible results and avoids extracting very polar compounds and loss of volatiles during the evaporation step. Magnetic stirring instead of manual stirring or Soxhlet extraction is an easier, faster and more reproducible extraction procedure; and 2) column chromatography: slurry packing with silica permits a better stationary bed and, at the same time, avoids irreversible adsorption. By fractionating the whole THF coal extract, one avoids the precipitation of asphaltenes prior to column chromatography. In addition, fractionating the whole extract permits collection of the four S.A.R.A. (saturates, aromatics, resins and asphaltenes) fractions for further charaacterization. (JMT)

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg
• OSTI ID: 5368886
• Report Number(s): CONF-830814-Vol.3
• Journal Information: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States), Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Vol. 28:4; ISSN ACFPA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COAL LIQUIDS
EXTRACTION
FLUIDS
FURANS
HETEROCYCLIC COMPOUNDS
LIQUIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
QUALITATIVE CHEMICAL ANALYSIS
RESINS
SEPARATION PROCESSES
SOLVENT EXTRACTION
TETRAHYDROFURAN