Method for improved removal of cations using chela

专利名称：Method for improved removal of cations

using chelate resins

发明人：KLIPPER, REINHOLD,NEUMANN,

STEFAN,STOLL, JENS,SCHELHAAS,MICHAEL,VANHOORNE, PIERRE

申请号：EP10176509.7申请日：20100914公开号：EP2305381A2公开日：20110406

摘要：Preparing monodispersed ion exchanger (having chelating [(benzyl-phosphonomethyl-amino)-methyl]-phosphonic acid functional groups (I)) comprises: (a)converting monomer droplets of e.g. at least one monovinyl aromatic compounds, atleast one polyvinylaromatic compounds, at least one porogen and at least one initiatorto monodispersed crosslinked bead polymer; (b) phthalimidomethylating the polymerwith phthalimide derivative; (c) converting phthalimidomethylated bead polymer toaminomethylated bead polymer; and (d) reacting aminomethylated bead polymer ionexchanger with chelating groups. Preparing monodispersed ion exchanger (havingchelating [(benzyl-phosphonomethyl-amino)-methyl]-phosphonic acid functional groupsof formula (I)) comprises: (a) converting monomer droplets of at least one monovinylaromatic compounds, at least one polyvinylaromatic compounds, at least one porogenand at least one initiator or an initiator combination to a monodispersed crosslinked beadpolymer according to jetting principle or seed-feed principle; (b) phthalimidomethylatingthe monodispersed crosslinked bead polymer with phthalimide derivative in which 1-15

wt.% of bead polymer is added to the sulfur trioxide adduct of the phthalimide derivativepresent in an inert solvent and stirring at a temperature of = 35[deg] C for 1-15 hours,where the amount of free sulfur trioxide is 0.28-0.5 mol relative to 1 mol of phthalimideand the balance amount of the bead polymer to the sulfur trioxide adduct of phthalimidederivative present in the inert solvent is added at 50-75[deg] C; (c) convertingphthalimidomethylated bead polymer to aminomethylated bead polymer; and (d)reacting the aminomethylated bead polymer ion exchanger with chelating groups. A :polymer backbone. An independent claim is included for the above monodispersed ionexchanger whose total capacity is 3.1-3.9 mol/l and an average pore diameter of 70-85nm. [Image].

申请人：LANXESS DEUTSCHLAND GMBH

地址：51368 Leverkusen DE

国籍：DE

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