Stable supersaturated solutions of sparingly soluble salts

Details Stable supersaturated solutions of sparingly soluble salts Stable supersaturated solutions of sparingly soluble salts

B - Operations, Transporting

01

D

167/292

B01D 11/04 (2006.01) B01D 13/00 (1980.01)

Patent

CA 1180279

STABLE SUPERSATURATED SOLUTIONS OF SPARINGLY SOLUBLE SALTS ABSTRACT OF THE DISCLOSURE Method and compositions are provided concerning stable supersaturated aqueous solutions of sparingly soluble inorganic salts. The method involves exceeding the solu- bility level of a sparingly soluble inorganic salt in water at ambient temperatures in the presence of polyanionic polyelectrolyte having a molecular weight of at least about 900 daltons and an ionic equivalent weight of not greater than about 65 and at least five ionizable groups per molecule. The solubility level may be exceeded by cooling a saturated solution of the sparingly soluble salt, preparing the sparingly soluble salt in situ, or adding a soluble salt having a common ion with the sparingly soluble salt to a concentrated or saturated solution of the sparingly soluble salt.

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