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US 9,708,690 B2Granted
Method for platinum recovery from materials containing rhenium and platinum metals
AssigneeTechemet, LP
InventorsLouis A. Britton, Georges Z. Markarian
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to hydrometallurgical methods for the isolation and recovery of platinum from rhenium-containing materials, and more particularly, from superalloys containing rhenium, platinum, and other metals. The disclosure also relates to apparatuses capable of carrying out the hydrometallurgical methods and the product streams generated from the methods and apparatuses.
Claims114
A method of separating platinum and rhenium comprising the steps of:
- contacting a liquid comprising platinum and rhenium and a chelating ion exchange resin;
- and
- adsorbing the platinum onto the chelating ion exchange resin,
- further comprising, prior to the step of contacting the liquid comprising platinum and rhenium and a chelating ion exchange resin, the steps of:
- digesting an alloy feed comprising platinum and rhenium in a complexing ligand comprising halides in an amount sufficient to complex the platinum present in the alloy feed;
- and
- separating resulting solids from the liquid comprising platinum and rhenium,
- wherein a concentration of rhenium and/or platinum in the resulting solids is from 50 to 100% lower than a concentration of rhenium and/or platinum in the alloy feed,
- the method further comprising, following the step of contacting the liquid comprising platinum and rhenium and a chelating ion exchange resin, obtaining a liquid stream comprising a higher relative concentration of rhenium to platinum than a relative concentration of rhenium to platinum in the liquid comprising platinum and rhenium.
6 more elements
A method of separating platinum and rhenium comprising the steps of:
- contacting a liquid comprising platinum and rhenium and a chelating ion exchange resin;
- and
- adsorbing the platinum onto the chelating ion exchange resin,
- further comprising, prior to the step of contacting a liquid comprising platinum and rhenium and a chelating ion exchange resin, a step of decreasing an oxidative reduction potential value of the liquid comprising platinum and rhenium,
- the method further comprising, following the step of contacting the liquid comprising platinum and rhenium and a chelating ion exchange resin, obtaining a liquid stream comprising a higher relative concentration of rhenium to platinum than a relative concentration of rhenium to platinum in the liquid comprising platinum and rhenium.
2 more elements
A method of separating platinum and rhenium comprising the steps of:
- contacting a liquid comprising platinum and rhenium and a chelating ion exchange resin;
- and
- adsorbing the platinum onto the chelating ion exchange resin,
- wherein less than 10% by weight of rhenium is adsorbed onto the chelating ion exchange resin, relative to the amount of platinum adsorbed onto the chelating ion exchange resin.
1 more element
A method of separating platinum and rhenium comprising the steps of:
- contacting a liquid comprising platinum and rhenium and a chelating ion exchange resin;
- and
- adsorbing the platinum onto the chelating ion exchange resin,
- wherein less than 0.1% by weight of rhenium is adsorbed onto the chelating ion exchange resin, relative to the amount of platinum adsorbed onto the chelating ion exchange resin.
1 more element
A method of separating platinum and rhenium comprising the steps of:
- contacting a liquid comprising platinum and rhenium and a chelating ion exchange resin;
- and
- adsorbing the platinum onto the chelating ion exchange resin,
- further comprising, prior to the step of contacting a liquid comprising platinum and rhenium and a chelating ion exchange resin, a step of decreasing an oxidative reduction potential value of the liquid comprising platinum and rhenium,
- wherein the step of decreasing an oxidative reduction potential value of the liquid comprising platinum and rhenium comprises treating the liquid comprising platinum and rhenium with sulfur dioxide gas,
- the method further comprising, following the step of contacting the liquid comprising platinum and rhenium and a chelating ion exchange resin, obtaining a liquid stream comprising a higher relative concentration of rhenium to platinum than a relative concentration of rhenium to platinum in the liquid comprising platinum and rhenium.
3 more elements
Dependencies are inferred from the claim text.