Condensate purification process by use of dilute clear lime solu

Details Condensate purification process by use of dilute clear lime solu Condensate purification process by use of dilute clear lime solu

1978-03-15

1979-10-30

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

521 26, B01D 1506

Patent

active

041727835

ABSTRACT:
There is provided an improvement in the method of regenerating the anion portion of a mixed anion/cation exchange resin bed used for purification of condensate water. The improvement comprises utilizing a clear dilute lime solution substantially free of non-hydroxylic anions. This solution is produced by passing a solution of calcium salt through a strong base anion exchanger in the hydroxyl form, and thus producing calcium hydroxide by salt splitting. The spent resin is regenerated with spent caustic regenerant from a condensate purification process or with fresh caustic. It is preferred that the calcium solution and the regenerant enter the ion exchanger in counterflow pattern to minimize leakage of non-hydroxy ions.

REFERENCES:
patent: 2606098 (1952-08-01), Bauman
patent: 2917368 (1959-12-01), Juda
patent: 3013861 (1961-12-01), Franz
patent: 3501401 (1970-03-01), Calmon
patent: 3709818 (1973-01-01), Gustafson et al.

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