Sulfur Dioxide → Potassium Metabisulfite

HRID 230998

反応式

HRID 230998 の反応式
[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]

参加物

5

反応物 4

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

生成物 1

HCID 28019Potassium Metabisulfite

実験手順

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.

後処理

  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.

出典と根拠

ORDレコード
ord-4943746cd2c242999c6bb207fbda0671
出典データセット
uspto-grants-1989_07
特許番号
US04844880

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