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US 2026/0308713 A1Published application
Process for recovering platinum-group metal from waste catalyst by using biocyanide and ionic liquid
AssigneeIucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
InventorsHyun Jung KIM, Ilyas SADIA
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Abstract
Disclosed in the content of the present disclosure is a process for bioleaching platinum group metals contained in spent catalysts using bio-cyanide produced from a microorganism, followed by recovering the platinum group metals with high purity using an organophosphorus ionic liquid as an extractant.
Claims19
A method of recovering a platinum group metal from a spent catalyst, comprising:
- a) forming a platinum group metal-containing cyanide leach liquor by leaching platinum group metals from a platinum group metal-containing spent catalyst using a solution containing bio-cyanide produced by metabolic action of a cyanide-producing microorganism;
- b) forming a platinum group metal-rich extract and a platinum group metal-depleted raffinate by liquid-liquid extraction treatment of the platinum group metal-containing cyanide leach liquor using a water immiscible organophosphorus ionic liquid as an extractant;
- and
- c) recovering platinum group metals from the extract.
1 more element
Dependencies are inferred from the claim text.