Patent ID: 11958754
Assignee: SEREN TECHNOLOGIES LIMITED
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 3:
4. The method of claim 3, wherein the method further comprises, in step (a), separating the non-aqueous phase from the acidic solution; and
(b) contacting the acidic solution depleted of the first rare earth metal with the composition which comprises an ionic liquid, and recovering the second rare earth metal therefrom;
and wherein:
the first rare earth metal is recovered from the non-aqueous phase in step (a), and said non-aqueous phase is recycled and used as the composition in step (b); and
the acidic solution has a pH of less than 3.5 in step (a), and the acidic solution has a pH of greater than 3.5 in step (b).