Recovery of cesium chloride from pollucite ore
US4938934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | May 16, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D17/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for recovering purified cesium chloride from a cesium aluminum silicate ore in which the ore is digested with aqueous hydrochloric acid and the silica solids removed to obtain an aqueous acidic digest solution of metal chlorides consisting of cesium chloride together with other metal chlorides, by PA0 (a) evaporating water from the digest solution to obtain a solid mixture of metal chlorides, including cesium chloride and hydrated aluminum chloride; PA0 (b) heating solid phase mixture at a temperature effective for converting the hydrated aluminum chloride to aluminum oxide without decomposing the cesium chloride; PA0 (c) extracting the resulting solids with water to obtain an aqueous extract of cesium chloride; and PA0 (d) separating the residual solids containing the aluminum oxide to produce a purified extract of cesium chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.