Sodium Sulfite → Sodium Pyrosulfite

HRID 371260Notes

Reaction equation

[S:1]([O-:4])([O-:3])=[O:2].[Na+:5].[Na+].[S:7]([O-])([OH:9])=[O:8].[Na+]>>[S:1]([S:7]([O-:9])=[O:8])([O-:4])(=[O:3])=[O:2].[Na+:5].[Na+:5]

Participants

Reactant 2

HCID 24437Sodium Sulfite

HCID 23665763Sodium Bisulfite

Product 1

HCID 656671Sodium Pyrosulfite

Procedure

Further comparative experiments were undertaken in the same manner as above except that the 0.01 mole/liter aqueous solution of sodium sulfite was replaced with an equal volume of a 0.01 mole/liter aqueous solution of sodium hydrogensulfite or a 0.00491 mole/liter aqueous solution of sodium pyrosulfite to give the results almost identical with those shown by the curve VI in FIG. 1. The residual cyanide concentration was 24.4 ppm or 29.8 ppm after 120 minutes of the treatment with sodium hydrogensulfite or after 129 minutes of the treatment with sodium pyrosulfite, respectively.

Sources & evidence

ORD record: ord-616b259863aa43079329487261f452ca
Source dataset: uspto-grants-1985_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04530768

Reaction notes

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