Process for liberating metals using direct production of...

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

Reexamination Certificate

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C075S721000, C075S740000, C075S743000

Reexamination Certificate

active

08070850

ABSTRACT:
A system which uses available waste acid process streams from hydrometallurgical extraction processes as absorption media for the direct production of leach grade acid solutions for return to the hydrometallurgical processing circuit for use in liberating metals from metal-bearing materials. The produced acid may have a concentration in the range suitable for processing of metal-bearing materials.

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patent: 6270555 (2001-08-01), Wood et al.
patent: 6280501 (2001-08-01), Ferron
patent: 7033480 (2006-04-01), King
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patent: 2004/0028585 (2004-02-01), Cardarelli et al.
patent: 2006/0117908 (2006-06-01), Virnig et al.
patent: 2007269550 (2007-10-01), None
Abstract of JP 2007269550 A Oct. 2007.
Machine translation of JP 2007269550 A.
“Reference Document on Best Available Techniques for the Manufacture of Large Volume Inorganic Chemicals—Ammonia, Acids and Fertilisers,” pp. 145 to 212, European Commission, Aug. 2007.
PCT/US08/85838 International Preliminary Examination Report issued Jul. 12, 2010.
Production by Contact Processes—pp. 325-332 date prior to 2006.

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