Water → Sulfuric Acid

HRID 991378Notes

Reaction equation

HRID 991378 reaction equation
O.[NH2:2][C:3]([NH2:5])=[O:4].[S:6](=[O:10])(=[O:9])([OH:8])[OH:7]>>[NH2:2][C:3]([NH2:5])=[O:4].[NH4+:2].[S:6](=[O:8])(=[O:7])([OH:10])[OH:9]

Participants

5

Reactant 3

HCID 962WaterHCID 1118Sulfuric AcidHCID 1176Urea2×

Product 2

HCID 1118Sulfuric AcidHCID 22635082HCID 22635082, compound

Procedure

Two-three heated moles of ammonia to one mol of heated carbon dioxide, heated at 160° to 210° C. is forced through a reactor which has an aqueous solution or oil-water slurry of ammonia and carbon dioxide which is being circulated at 160° to 210° C. and under 2-6000 psi to form ammonium carbamate which when heated lose 1 mol of water thereby producing a heated aqueous solution containing 60 to 80% urea, then 1 mole of sulfuric acid is added to 4 moles of the aqueous solution of urea thereby producing an ammonium urea condensate salt of sulfuric acid and some urea sulfate and biuret sulfate. The aqueous urea contains smaller amounts of ammonia, ammonium carbonate and biuret.

Workup

  1. temperatureheated
  2. customthereby producing a heated aqueous solution

Sources & evidence

ORD record
ord-78fd15291cf240eb9afd672528d85a51
Source dataset
uspto-grants-2002_10
Patent number
US06464903B1

Reaction notes

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