Ammonium Sulfite → Calcium Sulfate

HRID 1439243Notes

Reaction equation

HRID 1439243 reaction equation
[O-2:1].[Ca+2:2].[S-2:3].[Ca+2].[S:5]([O-:8])([O-:7])=[O:6].[NH4+:9].[NH4+]>O>[S:5]([O-:1])([O-:8])(=[O:7])=[O:6].[Ca+2:2].[S:5]([O-:8])([O-:7])=[O:6].[Ca+2:2].[NH4+:9]=[S:3]

Participants

6

Reactant 3

HCID 25041Ammonium SulfiteHCID 6850728CalciumoxideHCID 10197613Calcium Sulfide

Product 2

HCID 24497Calcium SulfateHCID 10154041Calcium sulfite

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

reacting said waste water with a mixture of calcium oxide and calcium sulfide and with recycled ammonium sulfite from step (f), the molar ratio CaS/CaO being at least 0.5:1 and the amounts of the reactants being sufficient to form simultaneously insoluble calcium sulfate, insoluble calcium sulfite, and ammonium sulfide dissolved in the aqueous phase and then separating the resulting mixture of insoluble calcium sulfate and calcium sulfite from the aqueous phase,

Sources & evidence

ORD record
ord-cee7917a20854f248aa016ce03046856
Source dataset
uspto-grants-1977_11
Patent number
US04058591

Reaction notes

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