Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Utilizing fused bath
Reexamination Certificate
2005-07-05
2005-07-05
Bell, Bruce F. (Department: 1746)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Utilizing fused bath
C205S384000, C205S385000, C205S394000
Reexamination Certificate
active
06913682
ABSTRACT:
A cell for the electrowinning of aluminium comprising one or more anodes (10), each having a metal-based anode substrate, for instance comprising a metal core (11) covered with an metal layer12,an oxygen barrier layer (13), one or more intermediate layers (14; 14A,14B) and an iron layer (15). The anode substrate is covered with an electrochemically active transition metal oxide layer, in particular an iron oxide-based outside layer (16) such as a hematite-based layer, which remains dimensionally stable during operation in a cell by maintaining in the electrolyte a sufficient concentration of iron species and dissolved alumina. The cell operating temperature is sufficiently low so that the required concentration of iron species in the electrolyte (5) is limited by the reduced solubility of iron species in the electrolyte at the operating temperature, which consequently limits the contamination of the product aluminium by iron to an acceptable level. The iron oxide-based layer (16) is usually an applied coating or an oxidised surface of a substrate (11, 12, 13, 14, 15), the surface (15) of which contains iron.
REFERENCES:
patent: 6372099 (2002-04-01), Duruz et al.
Crottaz Olivier
de Nora Vittorio
Duruz Jean-Jacques
Bell Bruce F.
Moltech Invent S.A.
LandOfFree
Cells for the electrowinning of aluminium having... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cells for the electrowinning of aluminium having..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cells for the electrowinning of aluminium having... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3369809