Process for recovering cesium from cesium alum
USRE32556E · kind E · reissue
Inventor
Key dates
| Filing date | Jul 28, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Jul 28, 2006 |
Classification
- Technology area (CPC —)General
Abstract
Cesium is recovered from cesium alum, CsAl(SO.sub.4).sub.2, by a two-reaction sequence in which the cesium alum is first dissolved in an aqueous hydroxide solution to form cesium alum hydroxide, CsAl(OH).sub.3, and potassium sulfate, K.sub.2 SO.sub.4. Part of the K.sub.2 SO.sub.4 precipitates and is separated from the supernatant solution. In the second reaction, a water-soluble permanganate, such as potassium permanganate, KMnO.sub.4, is added to the supernatant. This reaction forms a precipitate of cesium permanganate, CsMnO.sub.4. This precipitate may be separated from the residual solution to obtain cesium permanganate of high purity, which can be sold as a product or converted into other cesium compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.