Sulfur Dioxide → Imidodisulfuric acid, N-hydroxy-, sodium salt (1:2)

HRID 2071893Notes

Reaction equation

[S:1]([OH:5])([OH:4])(=[O:3])=O.NO.[N:8]([O-:10])=O.[Na+:11].[S:12](=[O:15])([OH:14])[O-:13].[Na+].S(=O)=O>>[N:8]([S:12]([O-:15])(=[O:14])=[O:13])([S:1]([O-:5])(=[O:4])=[O:3])[OH:10].[Na+:11].[Na+:11]

Participants

Reactant 4

HCID 1119Sulfur Dioxide

HCID 159255Hydroxylamine, sulfate (1:1)

HCID 23665763Sodium Bisulfite

HCID 23668193Sodium Nitrite

Product 1

HCID 169269Imidodisulfuric acid, N-hydroxy-, sodium salt (1:2)

Procedure

One suitable technique for preparing hydroxylamine sulfate is the classical Raschig process, described in Kirk-Othmer, Vol. 7 (1951), page 766, paragraph 4, Briefly, the classical Raschig process involves the reduction of sodium nitrite with sodium bisulfite and sulfur dioxide to give sodium hydroxylamine -N, N-disulfonate, followed by hydrolysis of the hot solution to give hydroxylammonium acid sulfate.

Sources & evidence

ORD record: ord-ad25aac9584c441e88e2e2319e0a8aec
Source dataset: uspto-grants-1977_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04049646

Reaction notes

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