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. 15, 1979
Filed:
Jun. 28, 1977
Kouji Otani, Hitachi, JP;
Shigeoki Nishimura, Hitachi, JP;
Toshio Sawa, Hitachi, JP;
Seiichi Kikkawa, Katsuta, JP;
Ikuo Shimokobe, Hitachi, JP;
Nobuo Yoshida, Kashiwa, JP;
Kosaku Otsubo, Tokyo, JP;
Tsukasa Nishimura, Kure, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Plant Engineering & Construction Co., Ltd., Tokyo, JP;
Babcock-Hitachi K.K., Tokyo, JP;
Abstract
Waste water issued from a wet type desulfurization apparatus and containing thionic acid ions is introduced into ion-exchange towers filled with weak-basic anion-exchange which has to effect anion exchange therein. The weak-basic anion-exchange resin which has adsorbed the thionic acid ions is desorbed by contacting an alkaline solution. The thionic acid ions included in the desorbing solution are decomposed by heating them in the presence of acid. A decomposed solution is issued out of the system after its neutralization.