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Recycling of CdTe photovoltaic waste

United States Patent

5,897,685
April 27, 1999
View the Complete Patent at the US Patent & Trademark Office
A method for extracting and reclaiming metals from scrap CdTe photovoltaic cells and manufacturing waste by leaching the metals in dilute nitric acid, leaching the waste with a leaching solution comprising nitric acid and water, skimming any plastic material from the top of the leaching solution, separating the glass substrate from the liquid leachate, adding a calcium containing base to the leachate to precipitate Cd and Te, separating the precipitated Cd and Te from the leachate, and recovering the calcium-containing base.
Goozner; Robert E. (Charlotte, NC), Long; Mark O. (Charlotte, NC), Drinkard, Jr.; William F. (Charlotte, NC)
Drinkard Metalox, Inc. (Charlotte, NC)
08/ 855,873
May 12, 1997
This invention was made with U.S. Government support under contract No. DE-FG02-95ER81951 from the U.S. Department of Energy. The U.S. Government has certain rights in this invention.