Liquid membrane coated ion-exchange column solids

Details Liquid membrane coated ion-exchange column solids Liquid membrane coated ion-exchange column solids

1986-10-23

1988-05-31

Cintins, Ivars

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210643, 210670, 210679, 210688, B01D 1300, B01D 1504

Patent

active

047479493

ABSTRACT:
This invention relates to a method for improving the performance of liquid membrane separations by coating a liquid membrane onto solid ion-exchange resin beads in a fixed bed. Ion-exchange beads fabricated from an ion-exchange resin are swelled with water and are coated with a liquid membrane material that forms a film over the beads. The beads constitute a fixed bed ion-exchange column. Fluid being treated that contains the desired ion to be trapped by the ion-exchange particle is passed through the column. A carrier molecule, contained in the liquid membrane ion-exchange material, is selective for the desired ion in the fluid. The carrier molecule forms a complex with the desired ion, transporting it through the membrane and thus separating it from the other ions. The solution is fed continuously until breakthrough occurs at which time the ion is recovered, and the bed is regenerated.

REFERENCES:
patent: 3410794 (1968-11-01), Li
patent: 3494881 (1970-02-01), Ryan et al.
patent: 3645997 (1972-02-01), D'Alelio
patent: 3779907 (1973-12-01), Li et al.
patent: 4048064 (1977-09-01), Clark

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