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:
Sep. 11, 2007
Filed:
Apr. 17, 2003
Hirohisa Kikuyama, Osaka, JP;
Masahide Waki, Osaka, JP;
Shinji Hashiguchi, Osaka, JP;
Tetsuo Nishida, Osaka, JP;
Yasutaka Tashiro, Osaka, JP;
Kenji Aoki, Osaka, JP;
Hirohisa Kikuyama, Osaka, JP;
Masahide Waki, Osaka, JP;
Shinji Hashiguchi, Osaka, JP;
Tetsuo Nishida, Osaka, JP;
Yasutaka Tashiro, Osaka, JP;
Kenji Aoki, Osaka, JP;
Stella Chemifa Kabushiki Kaisha, Osaka, JP;
Abstract
Provided is a method for purifying a quaternary alkyl ammonium salt enabling the obtainment of a particulate quaternary alkyl ammonium salt having a low water content at a high yield which is suitably used as an electrolyte in an electrolytic solution. The method for the purification of a quaternary alkyl ammonium salt comprises dispersing a quaternary alkyl ammonium salt to be purified into an organic solvent to allow it to form a suspension there. The alkyl groups constituting the quaternary alkyl ammonium salt have 1 to 5 carbon atoms each. The quaternary alkyl ammonium salt to be purified is dispersed into the organic solvent to make a suspension, and then the particles are washed with an alcohol solvent.