Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal
Reexamination Certificate
2005-06-24
2009-10-20
Bos, Steven (Department: 1793)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vib metal
C423S062000, C423S138000, C423S154000, C502S038000, C502S050000
Reexamination Certificate
active
07604784
ABSTRACT:
A process is disclosed for separation and recovery of vanadium, molybdenum, iron, tungsten, cobalt and nickel from alumina-based materials, mattes, ores, manufacturing by-products and waste. These elements are oxidized. The oxides are reacted with gaseous HCl to form volatile chloride-bearing compounds that subsequently sublimate. The volatile compounds are condensed in a downward-stepped thermal gradient that allows collection of moderate to high purity compounds of individual elements with exception of a nickel-cobalt co-condensate. Nickel is separated from cobalt by precipitation of nickel chloride from concentrated HCl pressurized with gaseous HCl.
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Zeng, Li, Cheng, Chu Young, A literature review of the recovery of the molybdenum and vanadium from spent hydrodesulphurization catalysts. Part I: Metallurgical processes,Hydrometallurgy(2009), doi: 10.1016/j.hydromet.2009.03.010.
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Bos Steven
Connolly Bove & Lodge & Hutz LLP
Metals Recovery Technology Inc.
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