ION-EXCHANGING PROPERTIES AND COORDINATING BEHAVIOR OF POLY[3,5-(1-PROPIO-2,4-DIHYDROXY PHENYLENE)BUTYLENE]

Resin (RPPBD) prepared by Friedel-Craft's polycondensation of 2,4-dihy droxypropiophenone with 1,4-butane diol in the presence of polyphospho ric acid catalyst proved to be a selective ion-exchange resin and indi cates coordination tendency for some metal ions. The resin was charact erized by elemental analysis, IR spectra, viscosity study and its numb er average molecular mass (($) over bar M(n)) was determined by non-aq ueous titration and found to be 2475 g/mol. Chelation ion-exchange pro perties of this resin have also been studied employing batch equilibra tion method. It was employed to study selectivity of metal ion uptake over a wide pH range and in media of various ionic strength. The overa ll rate of metal uptake follows the order: UO22+ > Fe3+ > CU2+ > Ni2+.