Method for concentrating, removing, and separating selected ions from source solutions using particulate solid supports functionalized with polyhydroxypyridinone ligands
US6432313B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Apr 6, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/3255
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Compositions and methods for selectively binding metal ions from a source solution comprise using a polyhydroxypyridinone-containing ligand covalently bonded to a particulate solid support through a hydrophilic spacer of the formula SS-A-X-L (HOPO)n where SS is a particulate solid support such as silica or a polymeric bead, A is a covalent linkage mechanism, X is a hydrophilic spacer grouping, L is a ligand carrier, HOPO is a hydroxypyridinone appropriately spaced on the ligand carrier to provide a minimum of six functional coordination metal binding sites, and n is an integer of 3 to 6 with the proviso that when SS is a particulate organic polymer, A-X may be combined as a single covalent linkage. The separation is accomplished by passing a source solution containing the ions to be separated through a column containing the particulate composition, causing the selected ions to be complexed to the HOPO ligands and subsequently removing the selected ions from the column by passing an aqueous receiving solution through the column and quantitatively stripping the selected ions from the HOPO ligand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.