Sulfur Dioxide → Sodium Pyrosulfite

HRID 2179868Notes

Reaction equation

HRID 2179868 reaction equation
[S:1](=[O:3])=[O:2].[S:4]([O-:7])([O-:6])=[O:5].[Na+:8].[Na+]>O>[S:4]([S:1]([O-:3])=[O:2])([O-:7])(=[O:6])=[O:5].[Na+:8].[Na+:8]

Participants

4

Reactant 2

HCID 1119Sulfur DioxideHCID 24437Sodium Sulfite

Product 1

HCID 656671Sodium Pyrosulfite

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

In another embodiment, the invention relates to a method for producing sodium metabisulfite. In particular, the method comprises introducing a gas stream, having sulfur dioxide, and a liquid stream, having sodium sulfite and water, into a column. The method also comprises absorbing at least a portion of the sulfur dioxide into the liquid stream and reacting at least a portion of the absorbed sulfur dioxide with sodium sulfite to produce a sodium metabisulfite stream. The method further involves evaporating at least a portion of the water from the liquid stream into the gas stream. The method also comprises precipitating sodium metabisulfite from the sodium metabisulfite stream in a crystallizer and withdrawing a slurry of sodium metabisulfite from the bottom of the crystallizer.

Workup

  1. additionIn particular, the method comprises introducing a gas stream
  2. customThe method also comprises absorbing at least a portion of the sulfur dioxide into the liquid stream

Sources & evidence

ORD record
ord-f0d022571a7d403ea1162165fdf1db39
Source dataset
uspto-grants-2005_05
Patent number
US06887452B1

Reaction notes

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