Separation of oil into fractions of asphaltenes, resins, aromatics, and saturated hydrocarbons
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United States of America Patent
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Sep 12, 1989
Grant Date -
N/A
app pub date -
Dec 23, 1988
filing date -
Dec 23, 1988
priority date (Note) -
Expired
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Abstract
The invention is a method of group type separation of whole oils and bitumen by high performance liquid chromatography into fractions of asphaltenes, resins, aromatics, and saturated hydrocarbons. A multistep process is involved wherein the oil is initially solvated with a three part solvent mixture of methanol, acetone, and choroform. The solvated oil mixture is injected with a mobile phase into a cyano bonded phase column which will retain asphaltenes and resins, and pass through aromatics and saturated hydrocarbons. The unretained aromatics and saturated hydrocarbons are then injected into a silica column which will retain aromatics and pass through saturated hydrocarbons. Saturated hydrocarbons are recovered as they pass through the silica column. The resins, asphaltenes, and aromatics are recovered from the columns by a displacement material.
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