SYNTHESIS OF A NOVEL ZEOTYPE ION EXCHANGER: zirconium 4-[N,N-diphosphonomethyl)benzoicacid],Zr[(O3PCH2)2NC6H4CO2H].nH2O AND INVESTIGATING IT’S ION EXCHANGE PROPERTIES

Zirconium phosphate and it’s related compounds are layered structures, belongs to zeotype materials. recently, they have attracted much interests in chemical researches; This was mainly due to their ion exchange properties. Zirconium phosphate have two basic structures which are denoted by α- and γ- zirconium phosphate. Both of these structures develops zeolite-like cavities in which the act of ion exchange is possible. A related modified category of α-zirconium phosphate, are zirconium phosphonates, with general formula of Zr(O3PR)2 in which R represent an organic group. In these materials, with correct choice of organic moiety different chemical and stereo chemical behaviors could be expected. In this paper the sequences of synthesis of a new modified structure of zirconium phosphonates with the formula of Zr[(O3PCH2)2NC6H4CO2H], zirconium [N,N-di(phosphonomethyl)benzoic acid] is introduced. In this structure the organic moiety is capable of coordination of metallic ions, and hence will be investigated for ion exchange separations from kinetic and thermodynamic points of view.

Keywords:

zirconium phosphate , zirconium phosphonate , ion exchange