Platinum recovery methods
AssigneeGeneral Electric Company
InventorsLawrence B. Kool, Genfa Hu
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Abstract
The present invention is directed to a method for recovery of platinum from a coating on a component, wherein the coating includes platinum aluminide, the method including: contacting the coating on the component with a reagent solution, the reagent solution including a reactive species capable of solubilizing an aluminum salt in water, which results in formation of a platinum-rich residue on the component; separating the platinum-rich residue from the component; and collecting the platinum-rich residue. The reactive species may be hexafluorosilicic acid.
Claims32
A method for recovery of platinum from a coating on a component, wherein the coating comprises platinum aluminide, the method comprising:
- contacting the coating on the component with a reagent solution, the reagent solution comprising hexafluorosilicic acid, whereby a platinum-rich residue is formed on the component;
- separating the platinum-rich residue from the component;
- and
- collecting the platinum-rich residue.
A method for recovery of platinum from a coating on a component, wherein the coating comprises platinum aluminide, the method comprising:
- contacting the coating on the component with a reagent solution by immersing the component in the reagent solution, the reagent solution comprising hexafluorosilicic acid, whereby a platinum-rich residue is formed on the component;
- separating the platinum-rich residue from the component by vibratory tumbling of the component;
- collecting the platinum-rich residue by centrifugation;
- and
- drying the platinum-rich residue.
A method for recovery of platinum from a coating on a component, wherein the coating comprises platinum aluminide, the method comprising:
- contacting the coating on the component with a reagent solution, the reagent solution comprising a reactive species, wherein the reactive species is capable of solubilizing an aluminum salt in water, whereby a platinum-rich residue is formed on the component;
- separating the platinum-rich residue from the component;
- and
- collecting the platinum-rich residue.
A method for recovery of platinum from a coating on a component, wherein the coating comprises platinum aluminide, the method comprising:
- contacting the coating on the component with a reagent solution by immersing the component in the reagent solution, the reagent solution comprising a reactive species, wherein the reactive species is capable of solubilizing an aluminum salt in water, whereby a platinum-rich residue is formed on the component;
- separating the platinum-rich residue from the component by vibratory tumbling of the component;
- collecting the platinum-rich residue by centrifugation;
- and
- drying the platinum-rich residue.
Dependencies are inferred from the claim text.