Method of producing sulfur from sulfur dioxide

Details Method of producing sulfur from sulfur dioxide Method of producing sulfur from sulfur dioxide

1974-11-14

1979-08-14

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C01B 1704

Patent

active

041645561

ABSTRACT:
A method for producing sulfur from sulfur dioxide. In the broadest embodiment, sulfur is produced 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 actually employed and in some cases, at least, some carbon oxysulfide will be produced. In the broadest embodiment, the reduction, and hence, the sulfur production will be accomplished in a single stage. In the more preferred embodiments, however, the production will be accomplished in a plurality of stages and, 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 from about 1.8:1 to about 2.2:1. The H.sub.2 S, COS and SO.sub.2 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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patent: 3495941 (1970-02-01), Van Helden
patent: 3848071 (1974-11-01), Groenendaal
patent: 3865927 (1975-02-01), Watson
"Chemical Abstracts"; vol. 67, 1967, 102,057z.
Kellogg: "Metallurgical Transactions", vol. 2, Aug. 1971, pp. 2161-2169.

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