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US 12,465,964 B2Granted
Method for recycling scrap glass from exhausted photovoltaic panels
AssigneeNuova Raecycle S.R.L.
InventorsGiovanni Modica, Piervittorio Luigi Trebucchi
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Abstract
A method for recycling glass scrap from exhausted photovoltaic panels containing organic and substantially lead-free contaminants which allows obtaining industrial-degree liquid sodium silicates and mixed inorganic silicates insoluble in water and in alkaline solutions having a high number of industrial applications. The embodiments also relate to soluble and insoluble silicates obtained by such a method.
Claims17
A method for recycling glass scrap from exhausted photovoltaic panels containing organic contaminants, the method comprising the steps of:
- obtaining glass scrap from exhausted photovoltaic panels, wherein the amount of lead present in said glass scrap is less than 280 ppm;
- grinding the glass scrap;
- treating the ground scrap with an aqueous solution of sodium hydroxide (NaOH) at a predetermined temperature, pressure, and time, to obtain a solid fraction and a liquid fraction;
- separating the solid fraction from the liquid fraction by filtration;
- and
- adding to the liquid fraction organic or inorganic chelating agents.
3 more elements
Dependencies are inferred from the claim text.