Production of elemental sulphur
AssigneeExxon Research & Engineering Co.
InventorGerald Moss
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Abstract
Elementary sulfur is obtained from sulfur-containing materials which release sulfur oxides (SO.sub.x) in the presence of oxygen by fluidizing such materials in a bed with an oxygen-containing gas (e.g., air), and passing the resulting SO.sub.x -containing gases through a bed (preferably fluidized) of carbonaceous or carbon-containing solids (such as coke or coal) at an elevated temperature to reduce SO.sub.x to elemental sulfur, the bottom of the bed of carbonaceous or carbon-containing solids being at about the level of the top of the bed of sulfur-containing materials.
Claims13
A method of producing elemental sulphur from a solid compound of sulphur, comprising treating particles ccontaining the said solid compound in a lower fluidized bed under such conditions that sulphur is liberated as SOx, passing the SOx upwardly into an upper fluidized bed at a temperature within the range of 310.degree. to 1350.degree. C. and containing char, (as herein defined), whereby at least some SOx is reduced to elemental sulphur, the char of the upper fluidized bed having a density lower than the density of the particles in the lower fluidized bed, whereby the upper fluidized bed floats upon the lower fluidized bed.
A method according to claim 6 comprising returning particles containing said solid compound of sulphur to the lower bed.
Dependencies are inferred from the claim text.