Ceramic – Glass
Raw materials for Glass Manufacturing:
Solvay’s Process – Ammonia Absorption :
This is a closed loop process. Closed looping is necessary to ensure that no free ammonia is let out to the atmosphere as such. And it is a highly important step to prevent environmental pollution. This step is the initial processing step in the Solvay’s process after the brine purification. The purified Brine is made to react with ammonia to form the ammoniated brine.
The ammonia that is reacted with the brine is not the fresh one… This ammonia is the recycled gas from the carbonation towers. Ammonia is recovered by recycling the outlet gas from the distillation plant to the absorption stage where it is absorbed in purified brine. This flow mainly contains recovered NH3 and a quantity of CO2. This chemical operation is achieved in equipment that allows close gas/liquid contact. As this is an exothermic reaction, cooling of the liquid is necessary during the operation to maintain efficiency. The outlet solution, with a controlled ammonia concentration, is called ammoniacal brine. Any gas that is not absorbed is sent to washer contacted with purified brine to remove traces of ammonia before it is recycled or released to the atmosphere.
To be contd….
