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US 4,156,656 AGranted
Preparation of hydrosulfides
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorsRaymond O. Dannenberg, Henry Dolezal
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Abstract
Hydrosulfides of sodium, potassium, calcium, barium and strontium are prepared by reaction of the oxide or hydroxide of the metal with sulfur in aqueous medium at elevated temperature and pressure.
Claims5
A process for preparation of an aqueous solution having a high content of hydrosulfide ion comprising reacting an oxide or hydroxide of calcium, barium or strontium with elemental sulfur in aqueous medium at a temperature of about 200.degree. to 250.degree. C. and a pressure of about 210 to 560 psig.
Dependencies are inferred from the claim text.