Back to results
US 4,816,235 AGranted
Silver and manganese recovery using acidified thiourea
OwnerBatric Pesicinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerBatric Pesicinventor
Estimating the term…
A method for obtaining silver and manganese metal from a silver-manganese ore includes the step of leaching the ore with acidified thiourea. More specifically, the method includes the step of leaching the ore with an acidic thiourea solution to form a leach liquor containing compounds of silver and manganese and an insoluble ore residue. The leach liquor is contacted with a quantity of activated carbon to adsorb the silver thiourea complexes on the carbon and to form an extract solution containing the manganese compounds. Next, the carbon which contains adsorbed silver thiourea complexes is contacted with an eluant to desorb the silver complexes from the carbon. The silver metal is recovered from the silver complexes obtained from desorbing the carbon. The manganese metal is recovered from the extract solution. The ore subjected to acidic thiourea leaching is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate. Conventional leaching techniques can be employed such as heap or dump leaching and agitation leaching.
A method for extracting manganese oxides from an ore, said method comprising the step of leaching the ore with an acidic thiourea solution to directly reduce the manganese oxides and to oxidize the thiourea to form a leach liquor containing compounds of manganese, wherein the ore is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate.
A method for extracting silver and manganese from an ore containing manganese oxides, said method comprising the step of leaching the ore with an acidic thiourea solution to simultaneously reduce the manganese oxides and complex the silver form a leach liquor containing compounds of silver and manganese, wherein the ore is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate.
A method for extracting silver and manganese from an ore, said method comprising the steps of:
A method for extracting silver and manganese in situ from an ore deposit, said method comprising the steps of:
A method for extraction of manganese from a manganese ore, said method comprising the steps of:
A method for extraction of manganese from a manganese ore, said method comprising the steps of:
A method for separating silver thiourea complexes from carbon comprising the step of eluting the complexes from the carbon with an aqueous thiosulfate solution.
A method for extracting silver and manganese from an ore containing higher oxides of manganese and free silver, said method comprising the step of leaching the ore with an acidic thiourea solution to form a leach liquor containing reduced manganese compounds, oxidized thiourea, and silver complexed by reacting with said oxidized thiourea, wherein the ore is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate.
A method for extracting manganese from an ore, said method comprising the step of leaching the ore with an acidic thiourea solution to form a leach liquor containing compounds of manganese, wherein the ore is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate, wherein the thiourea is present in a concentration ranging from 0.0001 to 1.0 molar, wherein the thiourea is acidified by hydrogen ion present in a concentraton ranging from 0.0001 to 0.5 molar, and wherein the leaching temperature is in the range from 0-45 degrees Centigrade.
A method for extracting manganese from an ore, said method comprising the step of leaching the ore with a solution consisting essentially of an acidic thiourea solution to form a leach liquor containing compounds of manganese, wherein the ore is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate.
A method for extracting silver and manganese from an ore, said method comprising the step of leaching the ore with a solution consisting essentially of an acidic thiourea solution to form a leach liquor containing compounds of silver and manganese, wherein the ore is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate.
A method for extracting silver and manganese from an ore, said method comprising the steps of:
A method for extraction of manganese from a manganese ore, said method comprising the steps of:
A method for extracting silver and manganese from an ore containing higher oxides of manganese and free silver, said method comprising the step of leaching the ore with a solution consisting essentially of an acidic thiourea solution to form a leach liquor containing reduced manganese compounds, oxidized thiourea, and silver complexed by reacting with said oxidized thiourea, wherein the ore is selected from the group consisting of in situ ore, mined ore, comminuted ore, and ore concentrate.
Dependencies are inferred from the claim text.