Page 18 - Curriculum Visions Dynamic Book

Making chlorine: the mercury cathode cell
Chlorine is one of the main chemicals used in modern plastics manufacture. There are two main ways of producing it.
About three-quarters of the chlorine needed for industry is produced by the mercury cathode cell process described below. Another process, the diaphragm
cell process, is described on pages 20 and 21.
Brine fed in
Chlorine
Graphite anodes
 Chlorine is stored in bottled form.
 A diagrammatic representation of the mercury cathode or Castner–Kellner cell.
 Distillation columns at the Castner–Kellner works, England.
Spent brine
Mercury cathode
Mercury
Pump
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