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:
Jul. 21, 2020
Filed:
Apr. 26, 2016
Kanto Denka Kogyo Co., Ltd., Tokyo, JP;
Hiroki Takizawa, Gunma, JP;
Kazuhide Yoshiyama, Gunma, JP;
Keisuke Kude, Okayama, JP;
Wataru Kashikura, Gunma, JP;
Takuro Abe, Gunma, JP;
Mitsuhara Shimoda, Gunma, JP;
Osamu Omae, Okayama, JP;
Hiroyuki Uehara, Gunma, JP;
KANTO DENKA KOGYO CO., LTD., Tokyo, JP;
Abstract
Disclosed is a method for purifying a difluorophosphate, the method including mixing a difluorophosphate containing an impurity with at least one treatment agent selected from the group consisting of carbonates, hydroxides, and halides of alkali metals or alkali earth metals and amines to isolate the impurity. It is preferable that the method further include filtering off, by filtration, a salt or a complex that has been formed by allowing the impurity to be mixed with the treatment agent. Preferably, a carbonate, a hydroxide, or a halide of an alkali metal is used as the treatment agent, and more preferably a carbonate, a hydroxide, or a halide of lithium is used as the treatment agent.