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:
Oct. 20, 1981
Filed:
Mar. 03, 1980
Jui-Yuan Sun, South Holland, IL (US);
Emmett H Burk, Jr, Glenwood, IL (US);
Jin S Yoo, Flossmoor, IL (US);
George P Masologites, Columbus, NC (US);
Atlantic Richfield Company, Philadelphia, PA (US);
Abstract
A process for reducing the sulfur and ash content of coal comprising the steps of: (1) contacting coal particles containing ash and iron pyrite mineral matter with a promoting amount of at least one conditioning agent, said conditioning agent having a ferrous component maintained at a pH of from about 5.5 to 11.0 and being capable of modifying or altering the existing surface characteristics of the pyrite under conditions to effectuate alteration of modification of at least a portion of the contained pyritic sulfur; (2) agglomerating the coal particles while said pyrite surfaces are altered or modified in an aqueous medium with hydrocarbon oil to form coal-hydrocarbon oil agglomerates; (3) separating said coal-hydrocarbon oil agglomerates from pyrite mineral matter and ash to recover coal-hydrocarbon oil agglomerates wherein the coal exhibits reduced sulfur and ash content.