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:
Nov. 15, 1983
Filed:
Jul. 21, 1981
Earl D York, Engelwood, CO (US);
Standard Oil Company (Indiana), Chicago, IL (US);
Abstract
A two-stage dedusting process is provided for dedusting heavy oil derived from solid hydrocarbon-containing material, such as oil shale, coal, or tar sand. In the process, heavy oil is fed to a first centrifuge where it is separated into a purified stream of heavy oil and a residual dust-enriched stream. The residual dust-enriched stream is fed to a second centrifuge where it is separated into a second purified stream of heavy oil and an even more highly concentrated, dust-enriched, second residual stream. Light oil derived from the solid hydrocarbon-containing material can be injected into the centrifuges to flush out the sticky dust-enriched residual streams. The concentrated, dust-enriched, second residual stream can be dried and combusted for use as solid heat carrier material in the retort.