Chelating behavior of new chelating resins derived from n-(o-hydroxybenzyl)iminodiacetic acid |
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| Authors: | Shozo Tomoshige Masahide Hirai Hiroyuki Ueshima Keihei Ueno |
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| Institution: | Uniselec Development Division, Unitika Ltd., Kozakura, Uji, Kyoto 611 Japan;Department of Organic Synthesis, Faculty of Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812 Japan |
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| Abstract: | The chelating behavior of a new resin prepared by polycondensation of N-(o-hydroxybenzyl) iminodiacetic acid (o-HDA) with phenol and formaldehyde, is compared with that of the monomer, with p-HDA resin and p-HDA monomer, and with Chelex-100. The order of chelate stability for the o-HDA resin is Cu(II) > Ni(II) > Zn(II) > Co(II). An unusually high stability of the o-HDA and o-HDA resin iron(III) chelates in acidic solution is attributed to the participation of the o-hydroxyl group in the coordination process. |
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