Process for producing anionic clays using magnesium acetate
US6333290A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1999 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Feb 10, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/72
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Economical and environment-friendly processes for the synthesis of anionic clays and anionic clay-like materials with acetate anions as the charge-balancing interlayer species are disclosed. The processes involve combining a slurry of a gibbsite or its thermally treated form with a slurry or solution of a magnesium source and magnesium acetate. The product is not washed, needs no filtration and exists in a close-to-neutral pH condition. The product can be spray dried directly to form microspheres, or it can be extruded to form shaped bodies. Because of the absence of foreign salts, the product can be combined with other ingredients in the manufacture of catalysts, absorbents, pharmaceuticals, cosmetics, detergents and other commodity products that contain anionic clays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.