DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Apparatus and method for the electrolytic production of metals

Abstract

Improved electrolytic cells and methods for producing metals by electrolytic reduction of a compound dissolved in a molten electrolyte are disclosed. In the improved cells and methods, a protective surface layer is formed upon at least one electrode in the electrolytic reduction cell and, optionally, upon the lining of the cell. This protective surface layer comprises a material that, at the operating conditions of the cell: (a) is not substantially reduced by the metal product; (b) is not substantially reactive with the cell electrolyte to form materials that are reactive with the metal product; and, (c) has an electrochemical potential that is more electronegative than that of the compound undergoing electrolysis to produce the metal product of the cell. The protective surface layer can be formed upon an electrode metal layer comprising a material, the oxide of which also satisfies the protective layer selection criteria. The protective layer material can also be used on the surface of a cell lining.

Inventors:
 [1]
  1. Belmont, MA
Issue Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
OSTI Identifier:
867737
Patent Number(s):
4999097
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Classifications (CPCs):
C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25C - PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS
DOE Contract Number:  
FG07-83ID12380
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; method; electrolytic; production; metals; improved; cells; methods; producing; reduction; compound; dissolved; molten; electrolyte; disclosed; protective; surface; layer; formed; electrode; cell; optionally; lining; comprises; material; operating; conditions; substantially; reduced; metal; product; reactive; form; materials; electrochemical; potential; electronegative; undergoing; electrolysis; produce; comprising; oxide; satisfies; selection; criteria; compound dissolved; reduction cell; producing metal; electrolytic cells; protective surface; layer comprising; substantially reduced; protective layer; electrolytic production; layer comprises; operating conditions; molten electrolyte; electrolytic cell; metal layer; surface layer; electrolytic reduction; substantially reduce; cell electrolyte; operating condition; metal product; producing metals; electrode metal; layer material; improved cell; improved electrolytic; improved cells; electrochemical potential; /204/

Citation Formats

Sadoway, Donald R. Apparatus and method for the electrolytic production of metals. United States: N. p., 1991. Web.
Sadoway, Donald R. Apparatus and method for the electrolytic production of metals. United States.
Sadoway, Donald R. Tue . "Apparatus and method for the electrolytic production of metals". United States. https://www.osti.gov/servlets/purl/867737.
@article{osti_867737,
title = {Apparatus and method for the electrolytic production of metals},
author = {Sadoway, Donald R},
abstractNote = {Improved electrolytic cells and methods for producing metals by electrolytic reduction of a compound dissolved in a molten electrolyte are disclosed. In the improved cells and methods, a protective surface layer is formed upon at least one electrode in the electrolytic reduction cell and, optionally, upon the lining of the cell. This protective surface layer comprises a material that, at the operating conditions of the cell: (a) is not substantially reduced by the metal product; (b) is not substantially reactive with the cell electrolyte to form materials that are reactive with the metal product; and, (c) has an electrochemical potential that is more electronegative than that of the compound undergoing electrolysis to produce the metal product of the cell. The protective surface layer can be formed upon an electrode metal layer comprising a material, the oxide of which also satisfies the protective layer selection criteria. The protective layer material can also be used on the surface of a cell lining.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}