Process for producing Mg-containing non-Al anionic clay
US6652828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2002 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This patent describes economical and environment-friendly processes for the synthesis of Mg-containing non-Al anionic clays. It involves a one-step process wherein a suspension comprising a trivalent metal source and at least a magnesium containing source as a divalent metal source is reacted to obtain a magnesium-containing non-Al anionic clay. The anionic clay has interlayers containing anions comprising hydroxycarbonate, carbonate, bicarbonate, acetate, hydroxyacetate, oxalate, nitrate, hydroxyl, and/or formate or mixtures thereof. There is no necessity to wash or filter the product. It can be spray dried directly to form microspheres or can be extruded to form shaped bodies. 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.