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:
Feb. 27, 2024
Filed:
Nov. 04, 2021
Applicant:
University of North Dakota, Grand Forks, ND (US);
Inventors:
Nolan Theaker, Grand Forks, ND (US);
Daniel Laudal, Grand Forks, ND (US);
Assignee:
University of North Dakota, Fargo, ND (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B 59/00 (2006.01); B01D 11/02 (2006.01); C22B 3/06 (2006.01);
U.S. Cl.
CPC ...
C22B 59/00 (2013.01); B01D 11/028 (2013.01); B01D 11/0288 (2013.01); C22B 3/06 (2013.01);
Abstract
A method for extracting rare earth elements and critical minerals including adding an acid to a mixture comprising organically bound rare earth elements. The mixture is maintained at a pH of 0.25 to 4 for a period of time, resulting in a liquor and a leached mixture. The liquor is removed from the leached mixture to form a dewatered cake. The dewatered cake is washed to form a washing liquid. The washing liquid is recycled to create a second slurry comprising organically bound rare earth elements.