Thermally-driven ion-exchange process for lithium recovery

Details Thermally-driven ion-exchange process for lithium recovery Thermally-driven ion-exchange process for lithium recovery

B - Operations, Transporting

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B01D 15/04 (2006.01) B01J 39/14 (2006.01) B01J 39/26 (2006.01) B01J 47/00 (2006.01) B01J 49/00 (2006.01) C01D 3/14 (2006.01) C01D 15/00 (2006.01) C01D 17/00 (2006.01) G01N 30/96 (2006.01) G01N 30/02 (2006.01) G01N 30/30 (2006.01)

Patent

CA 2188723

Ions (e.g. lithium) can be removed or recovered from brines containing those ions and optionally one or more other ions (e.g. other alkali metal ions) by the use of a temperature-swing, ion-exchange process employing an ion-exchange material. The process depends on a change in the selectivity coefficient of an ion exchange material for the ions desired to be recovered with a change in temperature, resulting in desirable ions being relatively selectively released at one temperature and undesirable ions being relatively selectively released at another temperature. The process of the invention can be used to effect the separation of any ion (or set of ions) from another ion or from a set of ions wherein the selectivity coefficient for one ion (or set of ions) has a substantial temperature dependence, compared to that for the other ion (or set of ions).

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