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:
Sep. 26, 2023
Filed:
May. 02, 2019
Applicant:
Arafura Resources Limited, Perth, AU;
Inventor:
Alexander Dean Elliot, Ferndale, AU;
Assignee:
ARAFURA RESOURCES LIMITED, Perth, AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B 3/10 (2006.01); C22B 59/00 (2006.01); C22B 3/20 (2006.01); C01F 17/282 (2020.01); C01F 17/235 (2020.01);
U.S. Cl.
CPC ...
C01F 17/282 (2020.01); C01F 17/235 (2020.01); C22B 3/10 (2013.01); C22B 3/20 (2013.01); C22B 59/00 (2013.01);
Abstract
A method of processing a purified rare earth sulphate solution, the method including the steps of: contacting the purified rare earth sulphate solution with sodium hydroxide to precipitate rare earths as rare earth hydroxide, including the addition of an oxidant to oxidise cerium contained in the rare earth hydroxide precipitate; and selectively leaching the rare earth hydroxide precipitate with hydrochloric acid to form a rare earth chloride solution and a residue.