Process for the recovery of elemental sulphur from residues produced in hydrometallurgical processes
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United States of America Patent
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Oct 20, 2009
Grant Date -
Nov 29, 2007
app pub date -
May 22, 2007
filing date -
May 26, 2006
priority date (Note) -
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Abstract
The present invention relates to a process for the recovery of elemental sulphur from residues produced in hydrometallurgical processes based on leaching with a solution of sodium sulphide in which the sulphur contained in the residues is selectively leached as sodium polysulphide. The sulphur leaching solution is conveniently regenerated and recycled to the process.
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