Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – By fixation in stable solid media
Reexamination Certificate
2006-02-03
2010-10-12
Johnson, Edward M (Department: 1793)
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
By fixation in stable solid media
C588S318000
Reexamination Certificate
active
07812209
ABSTRACT:
The present invention relates to a process for the solidification and stabilization of concentrated aqueous sodium hydroxide solution, characterized in that the following steps are carried out:a) a hydraulic binder containing blast furnace slag is mixed with said sodium hydroxide solution, in the presence of at least one additional source of calcium ions and/or magnesium ions and/or silica, to form a slurry, andb) the slurry is left to set to a solid product.The invention further relates to the solid product obtained by carrying out the process of the invention. The invention can be applied to the treatment of sodium hydroxide solutions that are radioactive or contaminated by other pollutants.
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International Search Report for International Application No. PCT/FR2006/050097 dated Jul. 17, 2006.
Database WPI , Section Ch, Week 198747, Derwent Publications Ltd., London, GB: AN 1987-332020 X00P2351351 & JP 62 238499 A (Denki Kagaku Kogyo KK), Oct. 19, 1987 abstract.
Cojan Jean-Yves
Jacquemmoz Christian
Jean Pierre Alain
Ledoyen Fabrice
Teixeira Filipe
Hamre Schumann Mueller & Larson P.C.
INERTEC
Johnson Edward M
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