Inorganic-organic hybrid gels for extracting species such as lanthanides and actinides, and their preparation
US6667016B1 · kind B1 · utility
5Cited by
14References
10Claims
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Key dates
| Filing date | Oct 6, 2000 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Oct 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J45/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Inorganic-organic hybrid gels can be employed to extract chemical species such as lanthanides and actinides and their preparation.The gels include a network of inorganic components with the formula: where M is Si, Ti, Zr or Al, wherein organic molecules which can complex the species to be extracted are integrated, with each organic molecule being covalently linked to one or several M atoms in the network. The network is made by a sol-gel process from metallic alkoxides functionalized with complexing groups (amino, ether, hydroxy, amido, pyridino and bipyridino), capable of extracting metals such as lanthanides and actinides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.