Effective recovery of lithium from lithium ion battery waste

摘要

A process for recovering Li-ions can include: providing a composition having Li-ions to be extracted therefrom; removing materials from the Li-ions; introducing one or more cyclic siloxane to the Li-ions so as to form one or more cyclic siloxane-Li-ion complexes; extracting the one or more cyclic siloxane-Li-ion complexes by one or more liquid-liquid extraction steps; separating an organic phase having the cyclic siloxane-Li-ion complexes from an aqueous phase; removing water from the organic phase; filtering the organic phase to obtain a filtrate; and obtaining one or more Li-ions (e.g., Li salts) from the filtrate.

主权项

1. A method for recovering lithium ions, the method comprising:
providing an article of manufacture having lithium ions; processing the article of manufacture to obtain a crude lithium-containing composition; introducing cyclic siloxanes to the crude lithium-containing composition so that the cyclic siloxane complexes with the lithium ions; preparing a liquid-liquid extraction composition having an organic solvent and water such that the complexes of the cyclic siloxanes and lithium ions partition into the organic solvent; and extracting the complexes of cyclic siloxanes and lithium ions by liquid-liquid extraction with an organic solvent and water.