Enhanced metal recovery through oxidation in liquid and/or supercritical carbon dioxide

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United States of America Patent

PATENT NO 10167202
APP PUB NO 20170240434A1
SERIAL NO

15419184

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Abstract

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Process for enhanced metal recovery from, for example, metal-containing feedstock using liquid and/or supercritical fluid carbon dioxide and a source of oxidation. The oxidation agent can be free of complexing agent. The metal-containing feedstock can be a mineral such as a refractory mineral. The mineral can be an ore with high sulfide content or an ore rich in carbonaceous material. Waste can also be used as the metal-containing feedstock. The metal-containing feedstock can be used which is not subjected to ultrafine grinding. Relatively low temperatures and pressures can be used. The metal-containing feedstock can be fed into the reactor at a temperature below the critical temperature of the carbon dioxide, and an exotherm from the oxidation reaction can provide the supercritical temperature. The oxidant can be added to the reactor at a rate to maintain isothermal conditions in the reactor. Minimal amounts of water can be used as an extractive medium.

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Patent Owner(s)

Patent OwnerAddress
KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGYTHUWAL 23955

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Blanco, Mario Thuwal, SA 19 235
Buttner, Ulrich Thuwal, SA 7 6

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