Integral water demineralizer system and method

Details Integral water demineralizer system and method Integral water demineralizer system and method

1985-03-07

1987-03-10

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210686, 210275, 210284, C02F 142

Patent

active

046489762

ABSTRACT:
A water demineralizer system and method is provided in which at least three beds of resin particles are connected in series flow arrangement preferably within a single vessel for substantially removing metal ions such as calcium and magnesium from water feed by exchange with hydrogen ions. The raw feed water flows first through an upper cation resin bed, then through an intermediate anion resin bed, and then through a lower bed of mixed cation and anion resins, and preferably flows downwardly through the beds. After the resin beds become saturated with metal ions from the feed water, mainly by calcium and magnesium ions, the beds are regenerated by first backwashing with water, then chemically treating with acid and caustic solution, followed by bed rinsing, air mixing and backflushing with water prior to further use for demineralizing the feed water.

REFERENCES:
patent: 3136719 (1964-06-01), Serra
patent: 3455819 (1969-07-01), Crits
patent: 3497069 (1970-02-01), Lindenthal et al.
patent: 3527718 (1970-09-01), Coburn
patent: 3985648 (1976-10-01), Casolo
patent: 4321145 (1982-03-01), Carlson
patent: 4383920 (1983-05-01), Muller et al.

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