Chemistry: electrical and wave energy – Processes and products
Patent
1978-02-17
1979-02-06
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204128, 204256, 204258, 204266, 204270, 204278, C25B 116, C25B 126, C25B 1102, C55B 1103
Patent
active
041382951
ABSTRACT:
An alkali chlorine diaphragm cell such as is constructed in a conventional manner whereby evolved gaseous chlorine rises in the pool of alkali metal chloride solution is provided with recycling means to recycle the solution from an upper level of the solution to a predetermined lower level of the solution adjacent the cell bottom, a plurality of spaced conduits are preferably provided for this purpose.
The downward recirculation of the electrolyte through these conduits is induced by the upward movement of the electrolyte caused by the gaseous chlorine rising in the electrolyte outside the conduits. These conduits advantageously are located at or near anode surfaces and prevent or restrain lateral movement of recycled electrolyte until the recycled electrolyte reaches such lower level usually adjacent the bottom of the anolyte chamber. The circulation is preferably conducted as a plurality of spaced downward streams, each stream being between a pair of cathode elements and discharging into the space between an anode element and at least one of the cathode elements of the pair.
This invention is concerned with an improved electrolytic cell for electrolysis of aqueous alkali metal halide solutions to produce the corresponding halogen and an improved method for operating cells used in such electrolysis. Alkaline compounds, notably sodium hydroxide, are produced in conjunction with chlorine production.
REFERENCES:
patent: 3910827 (1975-10-01), Raetzsch et al.
patent: 3930151 (1975-12-01), Shibata et al.
De Nora Oronzio
DeNora Vittorio
Andrews R. L.
Diamond Shamrock Technologies S.A.
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