Metal recovery

Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...

Reexamination Certificate

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C075S370000, C075S744000, C502S027000

Reexamination Certificate

active

08057572

ABSTRACT:
A method is provided for recovering rhenium from a titania-supported, rhenium-containing catalyst by treating the catalyst in the reduced form with an acid in an amount and for a time sufficient to dissolve the rhenium without dissolving the support.

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Kurt R. Rhoads, et al., “Metal Recovery and Catalyst Reuse from the Photocatalytic Oxidation of Copper-Ethylenediaminetetraacetic Acid”,Journal of Environmental Engineering, Apr. 2004, pp. 425-431.
V. V. Kochetkov, “Recovery of ammonium perrhenate during processing of platinum-rhenium catalysts”,Izvestiya Vysshikh Uchebnykh Zavedenii, Gornyi Zhurnal, 1997, 11-12, pp. 241-244 (Abstract Only).
M. A. Milusheva, et al., “Extraction of molybdenum and rhenium from solutions of nitric acid-sulfuric acid leaching of molybdenite concentrates”,Kompleksnoe Ispol'zovainie Mineral'nogo Syr'ya, 1986, 11, pp. 53-55 (Abstract Only).

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