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US 2025/0188564 A1Published application
Method for the Elution of Aluminum Ions and/or Zinc Ions
AssigneeLANXESS Deutschland GmbH
InventorsStefan Neufeind, Dirk Steinhilber, Joachim Kralik, Pavlos Makropoulos
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Abstract
The present invention relates to a method for the elution of aluminum ions and/or zinc ions of polymers containing aminomethylphosphonic acid groups.
Claims15
A process for elution of aluminum ions and/or zinc ions, comprising the steps of
- admixing an aminomethylphosphonic acid group-containing polymer, or a salt thereof, at least partially laden with aluminum ions and/or zinc ions with a base selected from the group of consisting of alkali metal hydroxides, ammonium hydroxide, and mixtures thereof;
- and
- eluting the aluminum ions and/or zinc ions with a solution.
A process for elution of aluminum ions and/or zinc ions, comprising the steps of,
- a.) bringing into contact with an aqueous metal ion solution containing aluminum ions and/or zinc ions and optionally further metal ions, at least one chelating resin containing functional groups of structural element (I)
- in which is the polystyrene copolymer skeleton and
- where R1 and R2 may not both simultaneously be hydrogen and X1 and X2 are independently hydrogen, sodium, potassium or lithium;
- and
- b.) eluting the aluminum ions and/or zinc ions with an aqueous alkali metal hydroxide solution or/and an ammonium hydroxide solution.
2 more elements
Dependencies are inferred from the claim text.