Sodium Chloride → HCID 20280874, compound

HRID 260617Notes

Reaction equation

[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[Na+:6].[Na+].[Cl-:8].[Na+]>>[Cl-:8].[Na+:6].[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[Na+:6].[Na+:6]

Participants

Reactant 2

HCID 5234Sodium Chloride

HCID 24436Sodium Sulfate

Product 1

HCID 20280874HCID 20280874, compound

Procedure

The present invention also makes use of the fact that the solubility of sodium sulfate decreases with increasing concentration of sodium chloride. Thus, sodium chloride/sodium sulfate solid mixture produced at high temperature can be added to the sodium sulfate feed source, such that the sodium chloride is completely dissolved. This decreases the solubility of sodium sulfate, whereby anhydrous sodium sulfate is precipitated out of solution as the only stable solid phase. Thus, the raw material is converted to anhydrous sodium sulfate, and the sodium sulfate from the evaporation stage is recovered. The sodium sulfate can be used to produce potassium sulfate, and any excess material is a valuable co-product.

Sources & evidence

ORD record: ord-77dc858bb4ec4d5b94174def60ba25ec
Source dataset: uspto-grants-1996_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05529764

Reaction notes

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