The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 1989
Filed:
Dec. 23, 1988
David G Nolte, Houston, TX (US);
Edwin L Collings, Jr, Sugar Land, TX (US);
Texaco Inc., White Plains, NY (US);
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.