By Solvay process sodium carbonate can be prepared.
It has following steps:
(a) Ammoniation Tower: Ammonia and saturated solution of brine is introduced into this.
(b) Carbonating Tower: In this, carbon dioxide is passed through ammoniated brine to form sodium bicarbonate.
(c) Filtration: Here filtration is done through vacuum filters.
(d) Calcination of Sodium Bicarbonate: Sodium carbonate is formed by calcination as.
2NaHCO3 → Na2CO3 + CO2 + H2O
(e) Ammonia recovery Tower : Here ammonia is recovered which is reused in ammoniation tower.
The whole process can be represented as:
