Method for fixing or separating ions, in particular of lead, using per(3,6-anhydro)cy-clodextrin derivatives
US6544964B1 · kind B1 · utility
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11Claims
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Key dates
| Filing date | Mar 24, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B37/0015
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to the fixation or separation of ions, particularly of Pb, by per(3,6-anhydro)cylcodextrin derivatives.This can be carried out by contacting the medium containing the ions to be fixed or separated, with a per(3,6-anhydro)cylcodextrin derivative of formula: in which at least one of the R1 represents OCH3, whilst the other R1 can represent OCH3, OH or other groups, for complexing the ions.Preferably, for the fixation of lead, the derivative complies with formula (I) with n=6 and all the R1=OCH3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.