Sulfur production

Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur

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423573R, C01B 1702

Patent

active

039729885

ABSTRACT:
A process is disclosed for the production of sulfur which comprises the oxidation of a sulfide solution in the presence of a catalyst comprising a metal phthalocyanine compound to produce sulfur and a polysulfide effluent, decomposition of the polysulfide effluent with steam at a temperature of from about 115.degree. to about 125.degree.C. and a pressure of 10 psig, to about 20 psig. to produce a vaporous phase effluent containing water, hydrogen sulfide and ammonia, the oxidation of at least a portion of the vaporous effluent with an oxygen-containing gas in the presence of a catalyst comprising a metal phthalocyanine compound dispersed on a solid support, said catalyst being in contact with a liquid phase comprising a thiosulfate-containing compound, at a temperature of from about 115.degree. to about 125.degree.C. and a pressure of from about 10 psig. to about 20 psig. to produce steam, sulfur and a thiosulfate compound and the recovery of the resultant sulfur.

REFERENCES:
patent: 3039855 (1967-06-01), Urban
patent: 3627465 (1971-12-01), Hamblin
patent: 3634037 (1972-01-01), Hamblin
patent: 3672835 (1972-06-01), Urban et al.

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