Aa. Blokhin et Vp. Taushkanov, ION-EXCHANGE PROCEDURE FOR CALCIUM REMOVAL FROM SOLUTIONS OF ZINC, CADMIUM, AND COBALT SALTS, Russian journal of applied chemistry, 67(7), 1994, pp. 1074-1075
A procedure for the removal of calcium impurity from zinc, cadmium, an
d cobalt salts has been proposed. The procedure consists of dissolutio
n of the salts in an ammonia solution, calcium selective sorption from
the resulting solutions on a carboxylic cation exchanger, and subsequ
ent calcium desorption by a mineral acid solution.