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. 25, 1984
Filed:
Jul. 21, 1981
Milton B Thacker, Aurora, CO (US);
Paul B Miller, Littleton, CO (US);
Standard Oil Company (Indiana), Chicago, IL (US);
Abstract
A centrifugal drying and dedusting process is provided to dedust heavy oil derived from solid hydrocarbon-containing material such as oil shale, coal or tar sand. In the process, heavy oil laden with particulates derived from the solid hydrocarbon-containing material is centrifuged into a dedusted stream of heavy oil and a dust laden centrifuge sludge. The dedusted stream of oil can be further dedusted in a desalter, after being first mixed with fresh water, to form a purified, highly dedusted, effluent stream of heavy oil. Dust laden water from the desalter is centrifuged into a dedusted stream of water and a dewatered centrifuge sludge. The dedusted stream of water is recycled upstream of the desalter and mixed with the influent oil stream. Desirably, the centrifuges sludges are mixed, heated, dried and separated into another dedusted stream of oil and a powdery, dust-enriched residual stream which can be combusted in a lift pipe for use as heat carrier material in the dryer and retort.