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US 12,392,010 B2Granted
Stationary phase for preparative separation of rare earth metals
AssigneeREEtec AS
InventorsSigve Sporstøl, Dejene Kifle
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Abstract
Stationary phase for preparative High Pressure Liquid Chromatography (HPLC) for preparative separation of Rare Earth Elements (REEs), the stationary phase comprising porous particles suitable for HPLC having a non-polar surface being impregnated with ligands binding REEs, wherein the porous particles has a pore size of 300 Å or higher, is described.
Claims6
A stationary phase for preparative High Pressure Liquid Chromatography (HPLC) for preparative separation of Rare Earth Elements (REEs), the stationary phase comprising:
- porous particles suitable for HPLC having a non-polar surface impregnated with ligands binding REEs;
- wherein the porous particles are porous silica particles having a surface modified by alkyl groups to make the surface thereof non-polar and suitable for binding of ligands binding REEs;
- and
- wherein the alkyl groups have a chain length of 4, 8 or 18 C atoms, the porous particles have a pore size between 700 Å and 1200 Å, and the ligand binding REEs is an acidic organo-phosphorous compound.
1 more element
Dependencies are inferred from the claim text.