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:
Oct. 27, 2009
Filed:
Oct. 21, 2004
Agnès Grandjean, Saint-Marcel-de-Careiret, FR;
Gilles Leturcq, Camaret-sur-Aigues, FR;
Christophe Baron, Bagnols-sur-Ceze, FR;
Agnès Grandjean, Saint-Marcel-de-Careiret, FR;
Gilles Leturcq, Camaret-sur-Aigues, FR;
Christophe Baron, Bagnols-sur-Ceze, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
The present invention relates to the use of a mixed carbonate of formula AB(CO), in which A and B are different and chosen from alkali metals, alkaline-earth metals and rare earths, for the containment of radioactive carbon. This use may for example involve a process comprising: mixing COhaving a radioactive carbon to be contained, or a simple carbonate of an alkali, alkaline-earth or rare-earth metal having a radioactive carbon to be contained, with an aqueous solution of a mixture of ACland BClor with an aqueous solution of a mixture of A(OH), and B(OH)in order to obtain a precipitate of AB(CO), where n and m are integers sufficient to compensate for the charge of A and B respectively; recovery of the AB(CO)precipitate in powder form; and then pressing and sintering of the powder at a 20 temperature below the decarbonation temperature of the mixed carbonate manufactured in order to obtain sintered pellets of mixed carbonates for the containment of the radioactive carbon.