Sodium sulfate decahydrate → Sodium Sulfate

HRID 1255376Notes

Reaction equation

HRID 1255376 reaction equation
[OH2:1].O.O.O.O.O.O.O.O.O.[S:11]([O-:15])([O-:14])(=[O:13])=[O:12].[Na+:16].[Na+].O.O.[S:20]([S:24]([O-:27])(=[O:26])=[O:25])([O-:23])(=[O:22])=[O:21].[Na+].[Na+]>>[S:11]([O-:15])([O-:14])(=[O:13])=[O:12].[Na+:16].[Na+:16].[OH2:21].[OH2:1].[S:20]([S:24]([O-:27])(=[O:26])=[O:25])([O-:23])(=[O:22])=[O:21].[Na+:16].[Na+:16]

Participants

4

Reactant 2

HCID 62649Sodium sulfate decahydrate2×HCID 57346125Sodium dithionate--water (2/1/2)

Product 2

HCID 24436Sodium SulfateHCID 57346125Sodium dithionate--water (2/1/2)

Conditions

Temperature
40 °C

Procedure

The crystal products from the chilled crystallizer contain sodium sulphate decahydrate and sodium dithionate dihydrate. The sodium sulphate decahydrate can be dehydrated by heating at 74 the mixed crystals to about 40° C. to form anhydrous sodium sulphate and sodium dithionate dihydrate. The sodium sulphate and sodium dithionate dihydrate solids can be heated to 267° C. at 76 to convert sodium dithionate dihydrate to additional anhydrous sodium sulphate, sulphur dioxide and a small amount of water. The sulphur dioxide and water can be recycled to the leach system. The anhydrous sodium sulphate crystals can be sold as a byproduct.

Sources & evidence

ORD record
ord-3d43c223a43f4c5a88ccb8c4e92593b4
Source dataset
uspto-grants-2013_06
Patent number
US08460631B2

Reaction notes

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