Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Utilizing fused bath
Reexamination Certificate
2007-08-14
2007-08-14
Bell, Bruce F. (Department: 1746)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Utilizing fused bath
C205S396000, C205S392000, C205S393000, C205S394000, C204S243100, C204S247000, C204S247500
Reexamination Certificate
active
10645069
ABSTRACT:
Operations in an electrolytic cell for producing aluminum are controlled by sensing infrared radiation on an outer surface of a cell chamber to determine an actual temperature. When the actual temperature is greater than a target temperature, a crust hole is repaired or the actual rate of addition of aluminum fluoride to the cell is increased. When the actual temperature is less than a target temperature, the actual rate of addition of aluminum fluoride to the cell is reduced.
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“Practical Considerations Used in the Development of a Method for Calculating Aluminum Fluoride Additions Based on Cell Temperatures”; Michael J. Wilson; Light Metals 1992, pp. 375-378, XP002183962.
U.S. EPA Office “Primary Aluminum Indusrty: Technical Support Document for Proposed MACT Standards” 1996.
Bruggeman Jay N.
Slaugenhaupt Michael L.
Alcoa Inc.
Bell Bruce F.
Greenberg & Traurig, LLP
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