Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal
Reexamination Certificate
2006-09-20
2009-11-17
Kastler, Scott (Department: 1793)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ivb metal
C423S074000, C423S082000, C423S083000, C423S084000, C209S010000, C209S011000, C209S012100
Reexamination Certificate
active
07618601
ABSTRACT:
A process for the enrichment of anatase mechanical concentrates, in order to obtain synthetic rutile with low contents of rare earth and radioactive elements, comprising the steps of: calcination of the anatase concentrate; reduction of the calcined product; dry or wet low-intensity magnetic separation of the reduced product; dry, high-intensity, high-gradient magnetic separation of the non-magnetic fraction from the low-intensity separation; leaching of the high-intensity magnetic fraction; oxidation of the dried product; leaching of the quenched product; filtering of the product from the second leaching; drying of the filtered product; and dry, high-intensity, high-gradient magnetic separation of the product of the second leaching.
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De Freitas Lino Rodrigues
Lessa Tude Joao Alberto
Moreira De Horta Ronaldo
Arent & Fox LLP
Bindseil James
Companhia Vale Do Rio Doce
Kastler Scott
Polyansky Alexander
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