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:
Dec. 25, 2007
Filed:
Nov. 26, 2003
Junji Mizutani, Osaka, JP;
Mitsuo Maeda, Osaka, JP;
Tamito Mukaida, Osaka, JP;
Yasushi Nishimura, Osaka, JP;
Yutaka Shiomi, Osaka, JP;
Koji Harada, Osaka, JP;
Yoshio Tanimoto, Osaka, JP;
Toshiaki Muratani, Yamatokoriyama, JP;
Junji Mizutani, Osaka, JP;
Mitsuo Maeda, Osaka, JP;
Tamito Mukaida, Osaka, JP;
Yasushi Nishimura, Osaka, JP;
Yutaka Shiomi, Osaka, JP;
Koji Harada, Osaka, JP;
Yoshio Tanimoto, Osaka, JP;
Toshiaki Muratani, Yamatokoriyama, JP;
Sasakura Engineering Co., Ltd., Osaka-Shi, JP;
Sharp Kabushiki Kaisha, Osaka-Shi, JP;
Abstract
The invention provides a hydrofluoric acid wastewater treatment method that achieves efficient recovery of hydrofluoric acid from hydrofluoric acid wastewater and also achieves sufficient reduction in the hydrofluoric acid concentration of the dehydrofluorinated water after treatment. The hydrofluoric acid wastewater treatment method comprises the following steps: