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:
Jul. 27, 1976
Filed:
Dec. 23, 1974
Charles W Matthews, Pittsburgh, PA (US);
Gulf Oil Corporation, Pittsburgh, PA (US);
Abstract
A process for gasifying coal to produce carbon monoxide and hydrogen in which a first stream of coal is burned without bed formation in combustion zone in the presence of water under oxidation conditions to produce gases comprising carbon dioxide and steam. A second stream of coal is maintained as a fluid bed in a separate gasifier zone by upflowing carbon monoxide and steam from the combustion zone while being gasified under reducing conditions to produce carbon monoxide and hydrogen. A high sulfur carbonaceous material from an external process comprises at least in part said first stream of coal entering the combustion zone and the sulfur dioxide produced therefrom in the combustion zone is reduced entirely to hydrogen sulfide in passage through the fluid bed gasifier zone.