Aqueous sulfur dispersion having reduced corrosive activity toward ferrous metal
AssigneeStandard Oil Company (Indiana)
InventorLouis E. Ott
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Abstract
A dispersion of up to about 70 weight percent elemental sulfur in an aqueous ammonia solution of at least one metal compound selected from the group consisting of soluble zinc and magnesium compounds has reduced corrosive activity toward ferrous metal. The atomic ratio of zinc and/or magnesium to sulfur is from about 0.0002 to about 0.1 and the mole ratio of ammonia to metal compound is from about 0.1 to about 200.
Claims12
A sulfur dispersion comprising a dispersion of finely divided elemental sulfur in an aqueous solution of ammonia and at least one metal compound, wherein the amount of elemental sulfur is from about 1 to about 70 weight percent based on the total dispersion, the metal compound is selected from the group consisting of soluble zinc and magnesium compounds, the moles of ammonia per gram-atom of metal from the metal compound is from about 0.1 to about 200, and the atomic ratio of metal to sulfur is from about 0.0002 to about 0.1.
A sulfur dispersion comprising a dispersion of finely divided elemental sulfur in an aqueous solution of ammonia and at least one metal compound;
- wherein the amount of elemental sulfur is from about 1 to about 70 weight percent based on the total dispersion;
- the metal compound is selected from the group consisting of zinc citrate, zinc thiosulfate, and magnesium citrate;
- the moles of ammonia per gram-atom of metal from the metal compound is from about 0.1 to about 200, and the atomic ratio of metal to sulfur is from about 0.0002 to about 0.1.
Dependencies are inferred from the claim text.