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Title: Aluminum reference electrode

Abstract

A stable reference electrode for use in monitoring and controlling the process of electrolytic reduction of a metal. In the case of Hall cell reduction of aluminum, the reference electrode comprises a pool of molten aluminum and a solution of molten cryolite, Na.sub.3 AlF.sub.6, wherein the electrical connection to the molten aluminum does not contact the highly corrosive molten salt solution. This is accomplished by altering the density of either the aluminum (decreasing the density) or the electrolyte (increasing the density) so that the aluminum floats on top of the molten salt solution.

Inventors:
 [1]
  1. Belmont, MA
Issue Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
OSTI Identifier:
866683
Patent Number(s):
4764257
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
FG07-83ID12380
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
aluminum; reference; electrode; stable; monitoring; controlling; process; electrolytic; reduction; metal; cell; comprises; pool; molten; solution; cryolite; na; alf; electrical; connection; contact; highly; corrosive; salt; accomplished; altering; density; decreasing; electrolyte; increasing; floats; top; highly corrosive; salt solution; molten salt; reference electrode; electrolytic reduction; electrical connection; molten aluminum; electrode comprises; cell reduction; corrosive molten; /205/204/

Citation Formats

Sadoway, Donald R. Aluminum reference electrode. United States: N. p., 1988. Web.
Sadoway, Donald R. Aluminum reference electrode. United States.
Sadoway, Donald R. Fri . "Aluminum reference electrode". United States. https://www.osti.gov/servlets/purl/866683.
@article{osti_866683,
title = {Aluminum reference electrode},
author = {Sadoway, Donald R},
abstractNote = {A stable reference electrode for use in monitoring and controlling the process of electrolytic reduction of a metal. In the case of Hall cell reduction of aluminum, the reference electrode comprises a pool of molten aluminum and a solution of molten cryolite, Na.sub.3 AlF.sub.6, wherein the electrical connection to the molten aluminum does not contact the highly corrosive molten salt solution. This is accomplished by altering the density of either the aluminum (decreasing the density) or the electrolyte (increasing the density) so that the aluminum floats on top of the molten salt solution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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