US 12,338,509 B2
Byproduct scandium recovery from low grade primary metal oxide ores
Willem P. C. Duyvesteyn, Reno, NV (US)
Assigned to Scandium International Mining Corporation, Reno, NV (US)
Filed by Scandium International Mining Corp., Sparks, NV (US)
Filed on Aug. 20, 2020, as Appl. No. 16/998,415.
Claims priority of provisional application 62/889,207, filed on Aug. 20, 2019.
Prior Publication US 2021/0172041 A1, Jun. 10, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C22B 59/00 (2006.01); C22B 1/00 (2006.01); C22B 3/00 (2006.01); C22B 3/08 (2006.01); C22B 3/42 (2006.01); C22B 3/44 (2006.01); C22B 15/00 (2006.01); C22B 26/12 (2006.01); C22B 34/12 (2006.01); C22B 34/22 (2006.01)
CPC C22B 59/00 (2013.01) [C22B 1/005 (2013.01); C22B 3/08 (2013.01); C22B 3/42 (2013.01); C22B 3/44 (2013.01); C22B 15/0071 (2013.01); C22B 23/043 (2013.01); C22B 26/12 (2013.01); C22B 34/1213 (2013.01); C22B 34/22 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for extracting metal values from a low grade primary metal oxide ore feedstock, comprising:
providing a low grade primary metal oxide ore feedstock containing a primary metal and scandium;
subjecting the ore to acid leaching, thus yielding an acidic leachate;
extracting the primary metal and scandium from the leachate, thereby yielding an acidic-barren leachate; and
using the acidic barren leachate in a subsequent iteration of the acid leaching step.