Method for recovering volatile rh from a gas phase

EP4764010A1Pending Publication Date: 2026-06-24YARA INTERNATIONAL ASA
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Patent Information

Application Number
EP2024222460
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2026-06-24

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Abstract

The present invention discloses a method for recovering Rh from a gas phase comprising volatile precious metals, comprising the steps of: a) catalytically oxidising ammonia into nitric oxide, particularly in the production of nitric acid or catalytically reacting ammonia with oxygen and methane, thereby generating hydrogen cyanide, whereby volatile precious metals are generated, wherein the volatile precious metals comprise at least volatile Rh; b) contacting volatile Rh generated in step a) with a recovery system comprising a compound of formula Co3-xMxO4, where M is Fe or Al and x =0-2; and c) forming a solid composition comprising the compound of formula Co3-xMxO4 and Rh, wherein the compound of formula Co3-xMxO4 is bonded with Rh, particularly as determined by SEM-EDS and TEM analysis. The present invention further relates to the use of the recovery system for recovering at least volatile Rh.
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Citation Information

Patent Citations

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    EP0063450A1

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    EP3727667A1

  • Recovery of platinum group metals

    GB1343637A

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    GB668935A

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    US20130149207A1