Stable supersaturated solutions of sparingly soluble salts

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

1979-12-10

1981-09-29

Schafer, Richard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

210646, 210647, 423422, 424128, 252182, B01D 1104, B01D 1300

Patent

active

042922275

ABSTRACT:
Method and compositions are provided concerning stable supersaturated aqueous solutions of sparingly soluble inorganic salts. The method involves exceeding the solubility level of a sparingly soluable 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.

REFERENCES:
patent: 4075108 (1978-02-01), Higley et al.
patent: 4202760 (1980-05-01), Storey et al.

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