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:
Nov. 05, 2013
Filed:
Feb. 19, 2010
Gunnar Buehler, Nickenich, DE;
Kilian Schwarz, Mainz, DE;
Gunnar Buehler, Nickenich, DE;
Kilian Schwarz, Mainz, DE;
Chemische Fabrik Budenheim KG, Budenheim, DE;
Abstract
A process for the production of iron (III) orthophosphate of the general formula FePO×nHO (n≦2.5) comprising: a) producing an aqueous solution containing Feions by introducing, iron (II), iron (III) or mixed iron (II, III) compounds selected from hydroxides, oxides, oxide hydroxides, oxide hydrates, carbonates and hydroxide carbonates, together with elementary iron, into a phosphoric acid-bearing aqueous medium, to dissolve Feions and to react Fewith elementary Fe in a comproportionation reaction to give Fe; b) separating solids from the phosphoric-acid aqueous Fesolution, and c) adding an oxidation agent to the phosphoric-acid aqueous Fesolution to oxidize iron (II) in the solution to precipitate iron (III) orthophosphate of the general formula FePO×nHO. The invention includes the product of the process and its use to make LiFePOfor batteries.