Ammonia → Ammonia

Participants

Reaction Steps

The still bottoms stream 16 is fed to a precipitation tank to precipitate 20 the remaining soluble calcium and magnesium. Carbon dioxide is added at a rate of 1602 kg/hr to precipitate the calcium carbonate and magnesium carbonate salts. The precipitation is carried out at ambient temperature in a tank of volume 40,000 liters. As the carbon dioxide reacts with calcium or magnesium, it produces sulfuric acid. A stream of 1238 kg/hr of ammonia is added to neutralize the sulfuric acid and maintain a pH of 8.0 to 8.5. The neutralization of sulfuric acid with ammonia produces ammonium sulfate.

Provenance & Evidence