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US 2014/0154157 A1Published application
Process of Treating End-of-Life Cathode Ray Tubes for Lead and Soluble Silicates Recovery
AssigneeCostech International S.P.A.
InventorGiovanni Modica
Life of this patent
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Abstract
There is described a process of recycling screen glass resulting from the disposal of cathode tube televisions, with quantitative recovery of lead in the form of sulphide and of silicates of cations other than lead, and subsequently recycling all the materials so recovered.
Claims15
A process of recovering lead and silicates from glasses resulting from cathode tube screen disposal, which comprises the following operations:
- etching the glass by means of a strongly alkaline compound, thus obtaining an aqueous-based liquid phase;
- adding a sulphide to the so obtained liquid phase, with the precipitation of lead sulphide;
- separating the solid lead sulphide from the above liquid phase.
Dependencies are inferred from the claim text.