Method for pretreating aqueous solutions with weakly acidic cati

Details Method for pretreating aqueous solutions with weakly acidic cati Method for pretreating aqueous solutions with weakly acidic cati

1983-12-13

1986-02-04

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210670, 210681, 210777, C02F 142

Patent

active

045684669

ABSTRACT:
A method for treating aqueous solutions by ion exchange uses a weakly acidic cation exchange resin to remove ammonia and other volatile amines along with corrosion products and metal ion leakage from a solution while substantially reducing the quantity of acid required to regenerate the cation exchange resin. The solution can be passed through a conventional mixed bed comprising a strongly acidic cation exchange resin and a strongly basic anion exchange resin after the pretreatment.

REFERENCES:
patent: 3475330 (1969-10-01), Gilles
patent: 3527718 (1970-09-01), Coburn
patent: 3779386 (1973-12-01), Ryan
patent: 3985648 (1976-10-01), Casolo

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