Method for treating a lead-containing glass that makes it possible to limit the migration in solution of the lead contained in this glass
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsFrédéric Angeli, Patrick Jollivet
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Abstract
A method for treating a lead-containing glass that makes it possible to limit the migration of the lead contained in this glass, the method successively comprising the following distinct steps: a step of placing the lead-containing glass in contact with a solution comprising perchloric acid; a step of heat treatment of the glass at a temperature less than or equal to the glass transition temperature of the glass.
Claims17
A method for treating a lead-containing glass, the lead-containing glass comprising at least 24% by weight of lead oxide relative to the total weight of the glass, the method successively comprising the following distinct steps:
- (a) placing the lead-containing glass in contact with a solution comprising perchloric acid for between 12 and 36 hours;
- (b) separating the lead-containing glass from the solution to provide a lead-reduced glass;
- (c) heating the lead-reduced glass at a temperature less than or equal to the glass transition temperature of the lead-reduced glass;
- whereby salting-out of lead from the lead-containing glass is limited to when the lead-containing glass is in contact with an aqueous solution.
A method for treating a lead-containing glass, the lead-containing glass comprising at least 24% by weight of lead oxide relative to the total weight of the glass, the method consisting of the following steps:
- (a) placing the lead-containing glass in contact with a solution comprising perchloric acid for between 12 and 36 hours;
- (b) separating the lead-containing glass from the solution to provide a lead-reduced glass;
- (c) heating the lead-reduced glass at a temperature less than or equal to the glass transition temperature of the lead-reduced glass.
Dependencies are inferred from the claim text.