Purification of elemental sulphur
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United States of America Patent
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Jan 27, 1998
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N/A
app pub date -
Apr 3, 1995
filing date -
Jun 5, 1989
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Abstract
A process for removing mercury from elemental sulphur contaminated therewith by liquid-liquid contact by mixing of the contaminated elemental sulphur in a molten state with an aqueous solution containing sulphide and polysulphide anions for extraction of the mercury contaminant from the elemental sulphur into the aqueous sulphide solution, and separating the aqueous sulphide solution containing mercury contaminant from the molten elemental sulphur to provide an elemental sulphur product substantially free from mercury.
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