Process for the purification of a solution of lithium salts contaminated by metallic cations and use of this process in the production of zeolites exchanged with lithium
US5919287A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1996 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/516
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the purification of a solution of lithium salts contaminated by metallic cations, comprising (i) passing the solution to be purified through an exchange region packed with a material suitable for the exchange of Li.sup.+ cations by contaminating metallic cations, this material being initially charged more than 95% with Li.sup.+ cations and having a better affinity for the contaminating metallic cations than for Li.sup.+ cations, so as to fix all of the contaminating metallic cations on the material by replacement of Li.sup.+ cations, whereby the solution of lithium salts recovered at the outlet of the exchange zone is stripped of contaminating metallic cations; and (ii) regenerating the material by replacement of the metallic cations fixed on the material with Li.sup.+ cations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.