Patent ID: 6699913
Filing Date: 2004-03-02
Classification: B01J,C02F,C08F

Abstract:
A process for preparing monodisperse anion exchangers having strongly basic functional groups distributed either in the center of the resin particle or in the shell of the resin particle comprising(a) reacting monomer droplets made from at least one monovinylaromatic compound and at least one polyvinylaromatic compound to give a monodisperse, crosslinked bead polymer, (b) amidomethylating the monodisperse, crosslinked bead polymer from step (a) with a phthalimide derivative, (c) converting the amidomethylated bead polymer from step (b) to an aminomethylated bead polymer, (d) Leuckart-Wallach-alkylating the aminomethylated bead polymer from step (c) to give a weakly basic anion exchanger having tertiary amino groups, (e) partially loading the weakly basic anion exchanger from step (d) using a strong acid, and (f) quaternizing the partially loaded weakly basic anion exchanger from step (e).