The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2019
Filed:
Apr. 26, 2018
Scandium International Mining Corp., Sparks, NV (US);
Willem P. C. Duyvesteyn, Sparks, NV (US);
Scandium International Mining Corporation, Sparks, NV (US);
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, NHand Mg; and processing the scandium-loaded stripping solution to yield scandium oxide.