ZUS AMMENFASSUNG :Es wird die Trennung Caz+/Sr2+ und die einfache frontandytische Abtrennung von Erdalkalispuren aus LMungen hoher Alkaliionen-Konzentration an dem Chelataustauscher auf Basis o-(2-Hydroxypheny1azo)benzoesiiure beschrieben. Die Kapazitllt des Austauschers betriigt 3,20 mMol/Gramm lufttrockenem Material.
SUMMARY:The separation Ca2+/Sr2+ is described and the simple frontanalytical separation of traces of alkaline earths from solutions with high alkali ion contents by use of a o-(2-hydroxypheny1azo)benzoic acid chelating resin. The ion exchanger haa a capacity of 3.20 mmde/g for the airdried material.
197
(Eingegangen a m 2. Januar 1970)ZUSABfMENFASSUNG :Die radikalische Perl-Copolymerisation von 4-Acetoxystyrol in Gegenwrtrt von Divinylbenzol fiihrt zu vernetztem Poly-4-acetoxy&yrol, aus dem durch schonende Vereeifung Poly-4-hydroxystyrol enteteht. Poly-4-hydroxystyrol reagiert mit Diazokomponenten zu polymeren Chelatbildnern mit o,o'-disubstituierten Azogmppen. Beechrieben wird die Syntheae eines Chelateustauschers auf Basis o-(t-Hydroxyphenylazo)benzoe&ure.
SUMMARY:The radical pearl-copolymerization of 4-acetoxystyrene in the presence of divinylbenzene yields cross-linked poly-4-acetoxystyrene which can be carefully hydrolized to ply-4-hydroxystyrene. Poly-4-hydroxyetyrene reacts with diazocompounds to chelate forming polymers with o,o'-disubstituted azo-groups. The synthesis of a chelating resin based on 0-(2-hydroxyphenylezo)benzoic acid is described.
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