Sulfur Dioxide → Potassium Metabisulfite

HRID 230998

Reaktionsgleichung

Reaktionsgleichung von HRID 230998
[OH-].[K+:2].C(=O)([O-])[O-].[S:7](=[O:9])=[O:8].[S:10](=[O:13])([OH:12])[O-:11].[K+]>>[S:10]([S:7]([O-:9])=[O:8])([O-:12])(=[O:11])=[O:13].[K+:2].[K+:2]

Komponenten

5

Edukt 4

HCID 1119Sulfur Dioxide2×HCID 14797Potassium HydroxideHCID 19660Carbonate IonHCID 23663620Potassium Bisulfite

Produkt 1

HCID 28019Potassium Metabisulfite

Versuchsvorschrift

In U.S. Pat. No. 3,369,866, potassium hydroxide or carbonate and sulfur dioxide are reacted in potassium bisulfite solution at a pH of 4 to 7.5, and a temperature of 50° to 80° C. The solution is transferred to a second vessel where its pH is reduced to 5.5 by the addition of more sulfur dioxide in order to prevent precipitation of potassium sulfite, and the solution is cooled to 15° to 25° C. to obtain a crop of potassium metabisulfite crystals. The main concerns are to avoid product oxidation and the inclusion of sulfite in the product. No mention is made of crystal size.

Aufarbeitung

  1. customa temperature of 50° to 80° C
  2. customThe solution is transferred to a second vessel
  3. customprecipitation of potassium sulfite
  4. temperaturethe solution is cooled to 15° to 25° C.

Quellen und Nachweise

ORD-Eintrag
ord-4943746cd2c242999c6bb207fbda0671
Quelldatensatz
uspto-grants-1989_07
Patentnummer
US04844880

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