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Imidazolium-based ionic liquid mixtures with [NO 3 ] - and [AlCl 4 ] - anions were used as oxidizing agents for the dissolution of Au, Pd, and Pt metals under mild conditions. The thermodynamic reduction of [NO 3 ] - to [NO] is catalyzed by [AlCl 4 ] - anions and coupled with the oxidation process of noble metals. The developed ionic liquid system for dissolving Au can reactivate the Au 0 formed in the deactivation process of the catalyst in vinyl chloride production. This demonstrates the relevance of the here-presented work for technical noble metal recycling., Competing Interests: The authors declare no competing financial interest., (© 2023 The Authors. Published by American Chemical Society.)