Sulfite → Sulfite

HRID 1415386Notes

Reaction equation

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

Participants

Reactant 2

HCID 1099Sulfite2×

HCID 14798Sodium Hydroxide2×

Product 2

HCID 1099Sulfite

HCID 1117Sulfate Ion

Procedure

FOr oxidation down to 1 g Na2S per liter black liquor, the black liquor consmues 39 liters of air per liter black liquor, while sulphite from soap splitting reduces the air demand to 18 liter per liter black liquor. For these points the alkalinity values of the black liquors are 4.5 g NaOH/liter and 8.0 g NaOH/liter, respectively. Alkali useful for the neutralization of the sulphite solution is thus produced by the reaction between sulphite and sulphide while sulphate from conventional sulphuric splitting solution is not at all capable of oxidizing the sulphide or to react with any other sulphur compound.

Sources & evidence

ORD record: ord-1a8d682f6bf64839a5e2db6423920e6a
Source dataset: uspto-grants-1977_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04005060

Reaction notes

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