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. 28, 1998
Filed:
Oct. 30, 1996
Takao Akiyama, Mito, JP;
Yoichi Miyamoto, Mito, JP;
Shunji Inoue, Nagoya, JP;
Yoshihiko Kurashima, Nagoya, JP;
Yoichi Karita, Handa, JP;
Douryokuro Kakunenryo Kaihatsu Jigyoudan, Tokyo, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A process for treating a radioactive waste, includes drying a radioactive waste containing a radioactive substance(s) and a sodium compound(s), to convert it into a dried material, heating the dried material to convert it into a molten salt, and subjecting the molten salt to electrolysis using the salt as an anolyte and .beta.-alumina as a sodium ion-permeable membrane. This process can recover metallic sodium or sodium hydroxide, each of extremely low radioactivity from a radioactive waste containing a radioactive substance(s) and a sodium compound(s), at a high purity at a high current efficiency.