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:
Apr. 13, 1993
Filed:
Feb. 26, 1991
Tsutomu Baba, Hitachi, JP;
Koichi Chino, Hitachi, JP;
Masami Matsuda, Hitachi, JP;
Takashi Nishi, Hitachi, JP;
Kiyomi Funabashi, Katsuta, JP;
Takashi Ikeda, Katsuta, JP;
Akira Sasahiro, Hitachi, JP;
Makoto Kikuchi, Hitachi, JP;
Shin Tamada, Hitachi, JP;
Hitachi Ltd., Tokyo, JP;
Abstract
The present invention adds carbonates or chlorides of alkaline earth metals to the radioactive wastes containing sodium sulfate and subjects sulfate group in the radioactive wastes to reduction treatment, thereby converts the sulfate group into sulfides of alkaline earth metals which are chemically stable substances while suppressing SOx generation, and solidifies the radioactive wastes stably for an extended period of time by applying to the converted radioactive wastes solidifying treatment.