Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1984-07-12
1986-07-22
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204247, 204268, 204295, C25C 308, C25C 318, C25C 322, C25C 324
Patent
active
046018042
ABSTRACT:
The thermally insulated cell comprises: a trough with a steel shell which is surrounded by an outer wall, is lined with a material which is resistant to electrolyte and high temperatures, and is closed by a lid; an electrolyte based on alkali chlorides; segregation wells for the addition of aluminum which is to be purified and for the precipitation of impurity crystals; a supply means which is used to feed-in electrolyte material and is also conceived as a waste gas extractor; a collection and run-off system for the high purity aluminum. Provided in the interior of the cell are bipolar electrode units which are connected electrically in series and are arranged immersed in the electrolyte parallel to the end electrodes. The electrode units comprise graphite frames closed and sealed off by a diaphragm plate, which can be wet by the electrolyte but not by the aluminum. The interpolar distance between the inner side of the diaphragm plate and the cathodic graphite frame is preferably 10-25 mm.
REFERENCES:
patent: 4118292 (1978-10-01), Fray et al.
patent: 4405415 (1983-09-01), Dewing et al.
patent: 4411747 (1983-10-01), Dawless et al.
Swiss Aluminium Ltd.
Valentine Donald R.
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