Processes for deionization and demineralization of fluids

Details Processes for deionization and demineralization of fluids Processes for deionization and demineralization of fluids

1997-05-15

1999-01-26

Therkorn, Ernest G.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210685, C02F 142

Patent

active

058634380

ABSTRACT:
Processes for deionization and demineralization of a fluid containing ions comprising:
(a) Loading an amine or ammonia buffer onto a first weakly acidic cation exchange resin to occupy cation exchange sites and to form a first bed comprising a first amine-buffered resin;
(b) Passing said fluid containing ions through said first bed comprising said first amine-buffered resin and exchanging cations of said fluid for amine cations of said first amine-buffered resin to form a first effluent comprising an anion-buffer salt complex;
(c) Passing said anion-buffer salt complex through a first weakly basic anion exchange resin where an anion portion of said anion-buffer salt complex is split from said anion-buffer salt complex by adsorption of said anion portion onto said weakly basic anion exchange resin to form a second effluent comprising buffer in free hydrated base form;
(d) Passing said buffer in free hydrated base form to a second weakly acidic cation exchange resin where said buffer loads onto said second weakly acidic cation exchange resin as in step (a) and repeating the process of steps (b)-(d); and
(e) Regenerating said first weakly acidic cation exchange resin with an organic acid.

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Brochure by Advanced Separation Technologies Incorporated, entilted: The ISEP Principle of Continous Absorption. pp. 1-21 (undated).

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