Process for the recovery of lead and silver chlorides
AssigneeHazen Research, Inc.
InventorsJames E. Reynolds, Alan R. Williams
Life of this patent
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Abstract
A process for selectively leaching lead and silver chlorides from a sulfide ore residue in a rapid time which comprises brine leaching the residue under pressure at a temperature above the normal boiling point of the solution, preferably above 100.degree. C. Modifications are leaching at the agglomeration temperature of sulfur when present in the residue to agglomerate the sulfur for ease of recovery, and flashing from leach temperature to ambient as a lead chloride crystallization recovery step to produce a large crop of lead chloride crystals per pass.
Claims27
A process for solubilizing a chloride selected from the group consisting of lead chloride and a combination of silver and lead chlorides which comprises subjecting the chloride to a brine leach at a temperature above the normal boiling point under a pressure above atmospheric sufficient to prevent boiling for a sufficient time to solubilize substantially all of the chloride.
A process for selectively solubilizing a chloride selected from the group consisting of lead chloride and a combination of lead and silver chlorides contained in a mixture of other solids including metal sulfides which comprises subjecting the mixture to a brine leach under a normal boiling point.
A process for solubilizing a chloride selected from the group consisting of lead chloride and a combination of silver and lead chlorides which comprises subjecting the chloride to a brine leach at a temperature above the normal boiling point under a pressure above atmospheric sufficient to prevent boiling for a time not in excess of 3 minutes sufficient to solubilize substantially all of the chloride.
A process for solubilizing a chloride selected from the group consisting of lead chloride and a combination of silver and lead chlorides which comprise subjecting the chloride to a brine leach at a temperature above the normal boiling point under a pressure above atmospheric sufficient to prevent boiling for a sufficient time to obtain a concentration of at least about 130 gpl of solubilized lead chloride.
Dependencies are inferred from the claim text.