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:
Jan. 09, 1990
Filed:
Feb. 16, 1988
Guy Magnin, Plaisir, FR;
Marie-Francoise Champeaud, Plaisir, FR;
Veronique Aubert, Les Clayes-sous-Bois, FR;
Claude Jaouen, Guyancourt, FR;
Abstract
The present invention relates to a process for the immobilization of ion exchange resins originating from radioactive produce (waste) reprocessing plants, the said resins being immobilized in a cement, preferably of the CLK type, wherein, before immobilization in the said cement, the said resins are treated with an aqueous solution containing NO.sub.3.sup.- and Na.sup.+ ions, the quantity of NO.sub.3.sup.- ions in the said aqueous solution being calculated so as to ensure that all the sites in the resins are saturated, assuming that all the resins treated are of anionic type and that the quantity of Na.sup.+ ions used in the said aqueous solution, or added in a second step, ensures on the one hand that the medium has a basic pH and on the other hand that all the sites in the cationic resins are saturated.