Ammonia → Pyrosulfuric acid, diammonium salt

HRID 1867192Notes

Reaction equation

HRID 1867192 reaction equation
[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[NH4+:6].[NH4+].[S:8](=O)(=[O:11])([OH:10])[O-:9].[NH4+].N>O>[S:1]([O:5][S:8]([O-:11])(=[O:10])=[O:9])([O-:4])(=[O:3])=[O:2].[NH4+:6].[NH4+:6]

Participants

5

Reactant 3

HCID 222AmmoniaHCID 24655Ammonium bisulfate2×HCID 6097028Ammonium Sulfate2×

Product 1

HCID 11960345Pyrosulfuric acid, diammonium salt

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Halstead (J. Appl. Chem., 1970, 20:129-132) describes the decomposition of ammonium sulfate at 400° C. The first reaction converts ammonium sulfate to ammonium bisulfate and ammonia. In a second reaction, the ammonium bisulfate dehydrates to form a water molecule and ammonium pyrosulfate, (NH4)2S2O7. Further heating of the ammonium pyrosulfate to form sulfur dioxide and nitrogen, which are not desired products from ammonium sulfate, is also carried out.

Workup

  1. customat 400° C
  2. customIn a second reaction

Sources & evidence

ORD record
ord-55c80b33a63743e7bb091342d6563c56
Source dataset
uspto-grants-2009_12
Patent number
US07632479B2

Reaction notes

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