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:
May. 26, 2026
Filed:
Aug. 06, 2020
Central Glass Co., Ltd., Ube, JP;
Mikihiro Takahashi, Yamaguchi, JP;
Masutaka Shinmen, Yamaguchi, JP;
Takayoshi Morinaka, Yamaguchi, JP;
Masataka Fujimoto, Yamaguchi, JP;
Susumu Iwasaki, Yamaguchi, JP;
Keita Nakahara, Yamaguchi, JP;
Masahiro Miura, Yamaguchi, JP;
Shunsuke Mimura, Yamaguchi, JP;
Katsuya Kubo, Yamaguchi, JP;
CENTRAL GLASS CO., LTD., Ube, JP;
Abstract
There is provided a method for producing lithium difluorophosphate in which difluorophosphate ester reacts with a lithium salt compound in a nonaqueous organic solvent without using water as a raw material, a method for producing a difluoro phosphate ester including a step of allowing a dihalophosphate ester to react with a fluorinating agent having a concentration of contained hydrogen fluoride of 15 mol % or less in a nonaqueous organic solvent; lithium difluorophosphate in which a value of a relational expression (d90−d10)/MV represented by d90 which is a particle size at which a volume cumulative distribution is 90%, d10 which is a particle size at which a volume cumulative distribution is 10%, and MV which is a volume average particle size is 10 or less; and methods for producing a nonaqueous electrolytic solution and a nonaqueous secondary battery using the production method described above.