Abstract:
Salt is dissolved in fresh and recycled water and sent to brine treatment
for calcium and magnesium removal. The brine enters the electrolytic cells
for electrolysis by low voltage direct current, produced by transforming and
rectifying high voltage alternating current.
The chlorine from the cell is chilled and then dried by contact with 98
percent sulphuric acid. Gaseous chlorine is compressed for delivery. Weak
caustic soda/brine mixture leaving the cell contains 11 percent caustic
soda. This is concentrated to 50 percent and then cooled to crystallise out
the salt.