Process for producing sulfur from sulfur dioxide

Details Process for producing sulfur from sulfur dioxide Process for producing sulfur from sulfur dioxide

C - Chemistry, Metallurgy

01

B

23/337

C01B 17/04 (2006.01)

Patent

CA 1063320

ABSTRACT OF THE DISCLOSURE A process for producing sulfur from sulfur dioxide by reducing the sulfur dioxide with a reducing gas comprising one or more lower monohydric alcohols. The reduction may be accomplished either thermally or catalytically and the principal products obtained will be elemental sulfur and/or hydrogen sulfide, depending principally upon the particular conditions and relative reactive concentrations employed. The reduction, and hence, the sulfur production can be accomplished in a single stage or in a plurality of stages. In a most preferred embodiment, the sulfur dioxide is first contacted with methanol under conditions such that the molar ratio of the hydrogen sulfide and carbon oxysulfide actually produced to the unconverted sulfur dioxide is within the range of from about 1.8:1 to about 2.2:1. The H2S, COS and SO2 will then be further reacted in one or more catalytic converters so as to increase the sulfur yield. Conventional Claus plant equipment can be used to effect this further conversion.

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