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sea water

sea water. BLOWING OUT TOWER. CONDENSER. SEPARATOR. STEAMING OUT TOWER. DRYER. Changes pH from approx 8 to 3.5. Chlorine added to displace bromine by redox reaction. Cl 2 (g) + 2 Br - (aq). 2Cl - (aq) + Br 2 (g). H 2 SO 4 (aq). + 2e - reduced. Cl 2 (g). - 2e - oxidised.

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sea water

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  1. sea water BLOWING OUT TOWER CONDENSER SEPARATOR STEAMING OUT TOWER DRYER

  2. Changes pH from approx 8 to 3.5 Chlorine added to displace bromine by redox reaction Cl2 (g) + 2 Br- (aq) 2Cl-(aq) + Br2 (g) H2SO4 (aq) + 2e- reduced Cl2 (g) - 2e- oxidised Sulphur dioxide gas injected Br2 (aq)+ SO2(g)+ H2O (l) 2HBr (aq)+ H2SO4 (aq) sea water BLOWING OUT TOWER SO2 (g) fresh water injected to produce fine mist of acids small xs SO2 added to remove any Cl or Br sea water hot vapour mixture Acid mixture contains about 13 % by mass of bromine as HBr HBr (aq) and H2SO4 Chlorine added to displace bromine by redox reaction Cl2 (g) STEAMING OUT TOWER Cl2 (g)+ 2HBr(aq) Br2 (g)+ 2HCl(aq) steam is used to distil the bromine out of the tower

  3. hot vapour mixture CONDENSER Br2 (g) + HCl (g)and steam SEPARATOR HCl (aq) damp bromine concentrated H2SO4 DRYER H2SO4 (aq) used to dry the damp bromine PURE BROMINE

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