Invention Grant
- Patent Title: Method for recovering scandium values from leach solutions
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Application No.: US15963996Application Date: 2018-04-26
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Publication No.: US10260127B2Publication Date: 2019-04-16
- Inventor: Willem P. C. Duyvesteyn
- Applicant: Scandium International Mining Corp.
- Applicant Address: US NV Sparks
- Assignee: Scandium International Mining Corporation
- Current Assignee: Scandium International Mining Corporation
- Current Assignee Address: US NV Sparks
- Agency: Fortkort & Houston PC
- Agent John A. Fortkort
- Main IPC: C22B3/26
- IPC: C22B3/26 ; C22B59/00 ; C22B3/20

Abstract:
A method for isolating scandium values is provided. The method includes providing a scandium-bearing ore; subjecting the scandium-bearing ore to an acid leaching process, thereby obtaining a leachate, wherein the pH of the leachate is less than 1.5; extracting scandium values from the leachate with an organic solvent, thereby obtaining a scandium-loaded organic solvent, wherein the leachate contains iron and scandium ions, and wherein the organic solvent contains a primary amine; stripping the scandium values from the scandium-loaded solvent with a stripping solution containing an acid and a salt, thereby obtaining a scandium-loaded stripping solution, wherein the acid is selected from the group consisting of sulfuric acid, nitric acid, hydrochloric acid and phosphoric acid, wherein the salt is selected from the group consisting of alkali chlorides, alkali earth chlorides, alkali nitrates, alkali sulfates, alkali phosphates, ammonium chlorides, ammonium nitrates, ammonium sulfates and ammonium phosphates, and wherein the salt comprises a cation selected from the group consisting of Na, K, Li, NH4 and Mg; and processing the scandium-loaded stripping solution to yield scandium oxide.
Public/Granted literature
- US20180312940A1 METHOD FOR RECOVERING SCANDIUM VALUES FROM LEACH SOLUTIONS Public/Granted day:2018-11-01
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