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Apparatus and methods for purifying lead

United States Patent

January 12, 2016
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
Disclosed is an exemplary method of purifying lead which includes the steps of placing lead and a fluoride salt blend in a container; forming a first fluid of molten lead at a first temperature; forming a second fluid of the molten fluoride salt blend at a second temperature higher than the first temperature; mixing the first fluid and the second fluid together; separating the two fluids; solidifying the molten fluoride salt blend at a temperature above a melting point of the lead; and removing the molten lead from the container. In certain exemplary methods the molten lead is removed from the container by decanting. In still other exemplary methods the molten salt blend is a Lewis base fluoride eutectic salt blend, and in yet other exemplary methods the molten salt blend contains sodium fluoride, lithium fluoride, and potassium fluoride.
Tunison; Harmon M. (Scotia, NY)
U.S. Department of Energy (Washington, DC)
14/ 182,788
February 18, 2014
NOTICE OF GOVERNMENT RIGHTS The United States Government has rights in this application and any resultant patents claiming priority to this application pursuant to contract DE-AC12-00SN39357 between the United States Department of Energy and Bechtel Marine Propulsion Corporation Knolls Atomic Power Laboratory.