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:
Aug. 05, 1980
Filed:
Oct. 17, 1978
Gerald Moss, Oxford, GB;
Abstract
CaS is converted to CaO with increased production of SO.sub.2 and decreased production of CaSO.sub.4 by passing CaS-containing particles into one region of a conversion bed wherein they are fluidized at an elevated temperature by an upwardly-passing oxygen-containing fluidizing gas, removing particles of increased CaO content from a second region of the bed, and providing a reducing agent (e.g. a hydrocarbon gas, liquid or carbonaceous solid) in the bed between the first and second regions, preferably nearer the latter, to produce a mildly reducing atmosphere which reduces any CaSO.sub.4 and increases the yield of SO.sub.2. The removed particles may be circulated to a fluidized gasification bed wherein a sulphur-containing fuel is converted to substantially sulphur-free fuel gas and wherein the sulphur is fixed as CaS in the particles, which particles are thereafter recirculated to the conversion bed.