| US 7,462,286 B2 | ||
| Chelate exchanger | ||
| Reinhold Klipper, Köln (Germany); Bruno Hees, Langenfeld (Germany); Olaf Halle, Köln (Germany); Wolfgang Podszun, Köln (Germany); Pierre Vanhoorne, Monheim (Germany); Hubertus Mittag, Wolfen (Germany); and Wolfgang Zarges, Köln (Germany) | ||
| Assigned to LANXESS Deutschland GmbH, Leverkusen (Germany) | ||
| Appl. No. 10/578,728 PCT Filed Nov. 06, 2004, PCT No. PCT/EP2004/012586 § 371(c)(1), (2), (4) Date May 10, 2006, PCT Pub. No. WO2005/049190, PCT Pub. Date Jun. 02, 2005. |
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| Claims priority of application No. 103 53 534 (DE), filed on Nov. 14, 2003. | ||
| Prior Publication US 2007/0062878 A1, Mar. 22, 2007 | ||
| Int. Cl. C02F 1/42 (2006.01) | ||
| U.S. Cl. 210—681 [210/688] | 17 Claims |
| 1. A method for producing an ion exchanger which comprises carboxyl groups and —(CH2)mNR1R2 groups, comprising the steps of:
a) reacting monomer droplets of a mixture of a monovinyl aromatic compound, a polyvinyl aromatic compound, a (meth)acrylic
compound, and an initiator or an initiator combination, thereby, forming a crosslinked bead polymer, and
b) functionalizing the crosslinked bead polymer using chelating groups and reacting, in this functionalizing step, the copolymerized
(meth)acrylic compounds to form (meth)acrylic acid groups, where
m is an integer from 1 to 4,
R1 is hydrogen or a radical CH2—COOR3 or CH2P(O)(OR3)2 or —CH2—S—CH2COOR3 or —CH2—S—C1—C4-alkyl or —CH2—S—CH2CH(NH2)COOR3 or
 or its derivatives or C═S(NH2),
R2 is a radical CH2COOR3or CH2P(O)(OR3)2 or —CH2—S—CH2COOR3 or —CH2—S—C1C4-alkyl or —CH2—S—CH2CH(NH2)COOR3 or
 or its derivatives or C═S(NH2) and
R3 is H or Na or K.
|