Sulfur Dioxide → Sodium Sulfite

HRID 280432Notes

Reaction equation

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

Participants

Reactant 2

HCID 1119Sulfur Dioxide

HCID 14798Sodium Hydroxide

Product 2

HCID 24437Sodium Sulfite

HCID 23665763Sodium Bisulfite

Procedure

In the upper section 3, caustic soda in solution will react with sulphur dioxide to form sodium sulphite and sodium bi-sulphite, whilst in the bottom section 5 a new balance will be favoured to produce sodium sulphate by reaction with sulphuric acid. Sufficient alkali will consequently be injected through stream 16 essentially to neutralise the sulphuric acid present in the bottom section 5. Also, sufficient water is introduced into the upper section 3 via the stream 16, or via some other source (not shown) to compensate for water flashed-off in the flash pan 9.

Sources & evidence

ORD record: ord-fef191c2792a4d43b5f6442601dd0625
Source dataset: uspto-grants-1986_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04589889

Reaction notes

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