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Methods for recovering metals from electronic waste, and related systems

United States Patent

9,777,346
October 3, 2017
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
Electrochemical Recycling Electronic Constituents of Value (E-RECOV)
A method of recovering metals from electronic waste comprises providing a powder comprising electronic waste in at least a first reactor and a second reactor and providing an electrolyte comprising at least ferric ions in an electrochemical cell in fluid communication with the first reactor and the second reactor. The method further includes contacting the powders within the first reactor and the second reactor with the electrolyte to dissolve at least one base metal from each reactor into the electrolyte and reduce at least some of the ferric ions to ferrous ions. The ferrous ions are oxidized at an anode of the electrochemical cell to regenerate the ferric ions. The powder within the second reactor comprises a higher weight percent of the at least one base metal than the powder in the first reactor. Additional methods of recovering metals from electronic waste are also described, as well as an apparatus of recovering metals from electronic waste.
Lister; Tedd E (Idaho Falls, ID), Parkman; Jacob A (Fuquay-Varina, NC), Diaz Aldana; Luis A (Idaho Falls, ID), Clark; Gemma (Idaho Falls, ID), Dufek; Eric J (Ammon, ID), Keller; Philip (Knoxville, TN)
Battelle Energy Alliance, LLC (Idaho Falls, ID)
14/ 845,101
20170067135
September 3, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under Contract Number DE-AC07-05-ID14517 awarded by the United States Department of Energy. The government has certain rights in the invention.