Sodium bicarbonate

Chemical Process Industries

1. SODIUM BICARBONATE Prepared by- Mr. Vishal B. Thakare ( M.Tech , Chemical SVNIT Surat) Assistant Professor PARUL UNIVERSITY Vadodara [email protected]

2. SODIUM BICARBONATE Sodium bicarbonate (NaHCO 3 ) is also known as backing powder. Raw material Basis: 1000kg of Sodium bicarbonate (98% yield) Sodium carbonate = 643.74kg Carbon dioxide = 267.28kg Water = 109.40kg Reaction Na 2 CO 3 + CO 2 + H 2 O 2NaHCO 3 Sodium bicarbonate

3. Saturated solution of soda ash is passed from the top of a carbonating tower. Compressed CO 2 gas is admitted in counter currently from the bottom of the tower. The temperature of the tower is maintained at 40°C by the cooling coils, provided above the bottom of the tower. The suspension of bicarbonate formed is removed from the bottom of the tower, filtered and washed on a vacuum rotary drum filter. After centrifugation, the product is dried on continuous belt conveyor at 70°C to get 99.9% pure sodium bicarbonate.