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US 9,950,320 B2Granted
Sulfonated aminomethylated chelate resins
AssigneeLANXESS Deutschland GmbH
InventorsReinhold Klipper, Stefan Neufeind
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Abstract
The invention relates to sulfonated aminomethylated chelate resins, to a method for producing same, to the use thereof for obtaining and purifying metals, in particular rare earth metals, from aqueous solutions and organic liquids, and for producing highly pure silicon.
Claims18
A chelating resin comprising functional groups of structural element (I)
- in which:
- represents a polymer skeleton;
- R1 and R2, independently of one another, represent —CH2COOX, —CH2PO(OX1)2, —CH2PO(OH)OX2, —(CS)NH2, —CH2-pyridyl or hydrogen, wherein R1 and R2 cannot both simultaneously be hydrogen;
- and
- X, X1, X2 and Y independently of one another represent hydrogen, sodium or potassium.
2 more elements
Dependencies are inferred from the claim text.