Process for preparing organically modified layered double hydroxide
US7786202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2006 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Feb 26, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing a layered double hydroxide comprising a charge-balancing anion, the process comprising the steps of: (a) preparing a precursor suspension or solution comprising a divalent metal ion source, a trivalent metal ion source, water, and a solvent which is miscible with water and in which at least 5 g/l of a charge-balancing anion precursor can be dissolved; (b) treating the precursor suspension or solution to obtain the layered double hydroxide, wherein the charge-balancing anion precursor is added to the suspension or solution before, during or after step (b), and wherein, if the charge-balancing anion is an organic anion, less than 50 wt % of the charge-balancing anion precursors, based on the total weight of charge-balancing anion precursors, is a salt, with the proviso that the charge-balancing anion is not carbonate. The invention further pertains to a layered double hydroxide obtainable by this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.