Process for purifying water

Details Process for purifying water Process for purifying water

1989-10-06

1992-10-13

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041825, 2041823, 204301, B01D 6100

Patent

active

051548097

ABSTRACT:
A process is provided for removing ions from water which is passed through an ion depletion compartment of an electrodeionization apparatus. The electrodeionization apparatus contains an ion depletion compartment containing mixed ion exchange resin beads and an ion concentration compartment which may contain ion exchange resin beads in a given separation stage having an anode and a cathode. The anion resin beads and cation resin beads utilized each comprise beams of substantially uniform size. A second liquid is passed through the ion concentration compartment to collect ions under the influence of DC potential which pass from the depletion compartments into the concentration compartments through ion permeable membranes. The electrodeionization apparatus can be operated continuously since resin regeneration is not required.

REFERENCES:
patent: 4165273 (1979-08-01), Azarov et al.
patent: 4632745 (1986-12-01), Giuffrida et al.
patent: 4925541 (1990-05-01), Giuffrida et al.
patent: 4931160 (1990-06-01), Giuffrida
Dowex Monospheres Resins Brochures, Mar. 1988.

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