Ammonia → Ammonia

HRID 2068458Notes

Reaction equation

HRID 2068458 reaction equation
[NH3:1].[S:2](=[O:6])(=[O:5])([OH:4])[OH:3]>>[S:2](=[O:4])(=[O:3])([OH:6])[OH:5].[NH3:1].[S:2]([O-:6])([O-:5])(=[O:4])=[O:3].[NH4+:1].[NH4+:1]

Participants

5

Reactant 2

HCID 222AmmoniaHCID 1118Sulfuric Acid

Product 3

HCID 222AmmoniaHCID 1118Sulfuric AcidHCID 6097028Ammonium Sulfate

Procedure

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.

Workup

  1. temperaturemaintain a pH of 8.0 to 8.5

Sources & evidence

ORD record
ord-f6f52384482f4fd4ab61d6af5f8ce6ec
Source dataset
uspto-grants-2012_10
Patent number
US08298796B2

Reaction notes

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