Abstract
An amalgam‐type caustic cell was studied. It consisted of an anode compartment which, contained brine and graphite anodes, and a cathode compartment which contained a mercury cathode, denuder water, and graphite chips. The compartments were separated by a horizontal “nylon” cloth diaphragm. Optimum operating characteristics of the cell were: denuder liquor velocity, 8.0 gal/hr/ft2 Hg; brine velocity, 1.0 gal/hr/ft2 Hg; brine temperature, 50°C; current density, 1.0 amp/in.2 Hg, and a voltage drop of 3.70 volts. The cell produced 0.80 lb caustic soda/kwhr at a current efficiency of 90–91%. This indicates slightly improved efficiencies over present commercial operation.
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