Sulfur Dioxide → Magnesium bisulfite

HRID 262442

Reaction equation

HRID 262442 reaction equation
C(=O)([O-])[O-:2].[Mg+2:5].[S:6](=[O:8])=[O:7]>>[S:6](=[O:2])([OH:8])[O-:7].[Mg+2:5].[S:6](=[O:2])([OH:8])[O-:7]

Participants

3

Reactant 2

HCID 1119Sulfur DioxideHCID 11029Magnesium Carbonate

Product 1

HCID 10130272Magnesium bisulfite

Procedure

According to the invention a method of recovering magnesia from magnesium carbonate containing raw material includes the steps of forming a slurry of uncalcined raw material, heating the slurry to a temperature between 40° and 90° C., treating the slurry with sulphur dioxide to form soluble magnesium bisulphite, separating undissolved impurities from the solution of magnesium bisulphite, precipitating magnesium sulphite from the solution, separating the precipitate from the mother liquor and recovering magnesia from the separated precipitate.

Workup

  1. customof forming a slurry of uncalcined raw material
  2. temperatureheating the slurry to a temperature between 40° and 90° C.

Sources & evidence

ORD record
ord-e2ec1990de354442a2347f9662ca4e4b
Source dataset
uspto-grants-1979_05
Patent number
US04154802

Linked notes

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