Separation of purified potassium sulfate from glaserite

Details Separation of purified potassium sulfate from glaserite Separation of purified potassium sulfate from glaserite

2008-10-16

2009-10-20

Hendrickson, Stuart (Department: 1793)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C209S162000, C209S163000, C423S552000

Reexamination Certificate

active

07604792

ABSTRACT:
A method can, in one general aspect, include steps for the recovery of potassium sulfate and mirabilite from glaserite. In another general aspect, a method includes dissolving glaserite in water at an elevated temperature to produce a saturated or nearly saturated solution, and cooling the solution to a temperature where potassium sulfate and mirabilite will crystallize from the solution as stable phases. In yet another general aspect, a method includes adding glaserite to a saturated solution of glaserite in water and mixing for enough time at a temperature where the glaserite will decompose into potassium sulfate and mirabilite as stable phases. In yet another general aspect, a method includes separating potassium sulfate from mirabilite using a froth floatation process.

REFERENCES:
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patent: 3685652 (1972-08-01), Chemtob et al.
patent: 4215100 (1980-07-01), Sokolov et al.
Linke, William F., Solubilities, vol. II, Fourth Edition, 1965, pp. 315-317, American Chemical Society, Washington, D.C.

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