Method for regeneration of cation-exchange condensate polishers

Details Method for regeneration of cation-exchange condensate polishers Method for regeneration of cation-exchange condensate polishers

1987-03-02

1988-06-28

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

C02F 142, B01J 4900

Patent

active

047537361

ABSTRACT:
A method for treating boiler water condensate to remove undesirable cations which comprises providing a bed of cation-exchange resin, passing water to be treated through said resin bed, and regenerating said resin with an aqueous solution of a salt comprising a volatile amine and an anion selected from anions which do not form precipitates with any cation present in the water to be treated under operational conditions, and wherein the volatile amine is optionally not the same as that employed as the corrosion inhibitor in the boiler water system. The preferred salts include cyclohexylamine citrate, methoxypropylamine citrate, diethanolamine citrate and monoethanolamine citrate. The proposed method is particularly advantageous since the anion of the regenerant salt is selected to avoid the formation of insoluble calcium salts.

REFERENCES:
patent: 4151079 (1979-04-01), Horembala
patent: 4298477 (1981-11-01), Cole

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