Process for the capture of a noble metal, especially rhodium and / or platinum, lost by volatilization from a catalyst to a high heated gas stream by using an oxide of formula a2o3

EP4747416A1Pending Publication Date: 2026-05-27K A RASMUSSEN +2
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
K A RASMUSSEN
Filing Date
2024-07-19
Publication Date
2026-05-27

AI Technical Summary

Technical Problem

Industrial processes, such as the Ostwald process, face significant challenges in capturing and recycling precious noble metals like rhodium and platinum, which are lost through volatilization due to high temperatures and exothermic reactions, leading to substantial economic costs.

Method used

A process involving the use of an oxide of formula A2O3, specifically Nd2O3, to capture volatilized rhodium and platinum from high-temperature gas streams in industrial catalysts, effectively addressing the issue of metal loss and incorporating additional benefits such as N2O decomposition.

Benefits of technology

The process achieves a significant improvement in capturing both platinum and rhodium, with enhanced rhodium capture at higher temperatures, thereby reducing metal loss and associated costs, while also decomposing unwanted N2O, a greenhouse gas.

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Abstract

The present invention relates to a process for the capture of a noble metal, especially of rhodium and / or platinum, lost by volatilization from a catalyst to a high heated gas stream (including local heating due to a highly exothermic reaction) by contacting the highly heated gas stream containing the volatilized noble metal with a first oxide element comprising an oxide of formula A2O3, especially Nd2O3, as well as the use of an oxide of formula A2O3, especially Nd2O3 for capture of such a noble metal or catchment devices comprising an oxide of formula A2O3, especially Nd2O3. This process is especially useful in relation to the industrial processes like the Ostwald process (showing a highly exothermic reaction) where a catalyst containing rhodium and platinum is used. In selected circumstances these oxides may also act on the decomposition of unwanted N2O arising in said Ostwald process.
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