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:
Mar. 03, 2015
Filed:
Apr. 17, 2013
Physical Sciences, Inc., Andover, MA (US);
Prakash B. Joshi, Andover, MA (US);
Dorin V. Preda, Medford, MA (US);
David A. Skyler, Methuen, MA (US);
Anait Tsinberg, Somerville, MA (US);
B. David Green, Methuen, MA (US);
William J. Marinelli, Harvard, MA (US);
Physical Sciences, Inc., Andover, MA (US);
Abstract
Rare earth elements are recovered from coal ash. The coal ash with rare earth elements can be treated with a mineral acid to form an aqueous mineral acid solution. The aqueous mineral acid solution can be extracted to form an organic solution that includes the rare earth salts. The organic solution can be mixed with water to form an aqueous solution that includes the rare earth salts. The rare earth elements are separated from the aqueous solution.