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. 14, 2017
Filed:
Mar. 14, 2012
Applicants:
Tetsuo Nishida, Osaka, JP;
Kazuhiko Shogami, Osaka, JP;
Tomoya Satoh, Osaka, JP;
Inventors:
Assignee:
STELLA CHEMIFA CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 25/455 (2006.01); H01M 10/0568 (2010.01); H01M 10/0566 (2010.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
C01B 25/455 (2013.01); H01M 10/052 (2013.01); H01M 10/0566 (2013.01); H01M 10/0568 (2013.01); H01M 2300/0045 (2013.01); Y02E 60/122 (2013.01); Y02P 70/54 (2015.11);
Abstract
A process for preparing difluorophosphate comprising reacting difluorophosphoric acid with at least one salt, as a raw material, selected from a halide salt, a carbonate, a phosphate, a hydroxide and an oxide of an alkali metal, an alkaline earth metal or an onium in the difluoraphosphoric acid, then separating a precipitate from the difluorophosphoric acid by solid-liquid separation, the precipitate being precipitated by crystallization operation in the difluorophosphoric acid, and removing the difluorophosphoric acid contained in the precipitate by distillation to obtain difluorophosphate.