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, and b) 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.
Type:
Grant
Filed:
February 3, 2006
Date of Patent:
October 12, 2010
Assignee:
INERTEC
Inventors:
Christian Jacquemmoz, Alain Jean Pierre, Filipe Teixeira, Jean-Yves Cojan, David Verschuere, Fabrice Ledoyen
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, and b) 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.
Type:
Application
Filed:
February 3, 2006
Publication date:
June 12, 2008
Applicant:
INERTEC
Inventors:
Christian Jacquemmoz, Alain Jean Pierre, Filipe Teixeira, Jean-Yves Cojan, David Verschuere, Fabrice Ledoyen
Abstract: A method of synthesis of alkali metal ferrates and alkaline earth metal ferrates, in which a trivalent iron compound is mixed with potash and optionally persulphate, and the mixture is heated at a temperature in the range of about 250 to about 500° C. for about 1 to 10 hours. The invention also relates to the use of the ferrates obtained by this method.
Type:
Grant
Filed:
June 10, 2004
Date of Patent:
October 3, 2006
Assignee:
INERTEC
Inventors:
Jean-Yves Cojan, David Verschuere, Farouk Tedjar
Abstract: A method of synthesis of alkali metal ferrates and alkaline earth metal ferrates, in which a trivalent iron compound is mixed with potash and optionally persulphate, and the mixture is heated at a temperature in the range of about 250 to about 500° C. for about 1 to 10 hours. The invention also relates to the use of the ferrates obtained by this method.
Type:
Application
Filed:
June 10, 2004
Publication date:
December 16, 2004
Applicant:
Inertec
Inventors:
Jean-Yves Cojan, David Verschuere, Farouk Tedjar