Abstract
AbstractSome new amphoteric ion exchangers have been synthesized by condensing salicylic acid, p‐hydroxybenzoic acid, sulfosalicylic acid, gallic acid, 3‐hydroxy‐2‐naphthoic acid, β‐resorcylic acid, and resacetophenone with epichlorohydrin employing ethylenediamine as a crosslinking agent. Some of the physicochemical properties, such as moisture content, true density, apparent density, void volume fraction, concentration of ionogenic groups, exchange capacity, rate of exchange, pH‐titration curves, pK values, isoionic point, thermal stability, oxidation resistance, and swelling behavior in different solvents, have been investigated.
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