Method for preparing an adsorbent material comprising a step of basic mixing, and method for extracting lithium from saline solutions using said material
US10850254B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 24, 2016 |
| Grant date | Dec 1, 2020 |
| Priority date | — |
| Expiry date | Dec 2, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/72
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to the field of solid materials for the adsorption of lithium. In particular, the present invention relates to a new method for the preparation of a crystallized and shaped solid material, preferably in extruded form, of formula LiXx.2Al(OH)3,nH2O, wherein n is between 0.01 and 10, x is 1 when X is an anion selected from among chloride, hydroxide and nitrate anions, and x is 0.5 when X is an anion selected from among sulfate and carbonate anions, comprising a boehmite precipitation step a) under specific temperature and pH conditions, at least one basic mixing shaping step, wherein the method also comprises a final hydrothermal treatment step, all to increase the lithium adsorption capacity and the kinetics of adsorption of the materials obtained, compared with the materials of the prior art when it is used in a method for lithium extraction from saline solutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.