Aqueous colloidal dispersion of a compound of cerium and at least one other element chosen from among the rare earths, transition metals, aluminum, gallium and zirconium preparation process and use
US7008965B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2001 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Jul 17, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to an aqueous colloidal dispersion of a compound of cerium and at least one other element M chosen from among the rare earths other than cerium; titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, aluminium, gallium and zirconium.This dispersion is characterized in that it displays a conductivity of at most 5 mS/cm. It is obtained by a process in which there is reacted with a base a mixture of at least one salt of cerium with at least one salt of an element M mentioned above and in the presence of an acid in a quantity such that the atomic ratio H+/(Ce+M) is greater than 0.1, then the precipitate from the preceding reaction is re-dispersed in water.The dispersions of this type cane be used in catalysis, in lubrication, in ceramics, in the manufacture of luminophorous compounds, in cosmetics and as anticorrosion agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.