Producing Sodium (Na)

Na: Sodium

Davy (UK) separated in 1807.

Abundance: 2.27%(in the earth's crust), 10.77g/litter (in sea water)

Heat calcite.

CaCO3 CaO + CO2

Mix quick lime with sand and water.

CaO + H2O Ca(OH)2

React carbon dioxide to salurated solution of sodium chloride (halite, evaporated sea water) and ammonia.

CO2 + NH3+ 2H2O + NaCl NaHCO3 + NH4Cl

Add calcium hydroxide to the solution.

2NH4Cl + Ca(OH)2 2NH3 + CaCl2 + H2O

Melt 60% calcium chlorite (to lower melting point) and sodium chloride (halite, evaporated sea water), and apply electrodialysis.