Recovery of rare earth elements from sulphurous acid...

Details Recovery of rare earth elements from sulphurous acid... Recovery of rare earth elements from sulphurous acid...

C - Chemistry, Metallurgy

22

B

53/162

C22B 3/38 (2006.01) C01F 17/00 (2006.01) C22B 59/00 (2006.01)

Patent

CA 2021415

-1- Abstract A process is described for the recovery of rare earth elements from a sulphurous acid solution containing them. The rare earth elements can be successfully separated and recovered by solvent extraction from the sulphurous acid solution, using an organo-phosphorus compound as extraction agent. Di-2-ethylhexyl phosphoric acid or 2-ethylhexyl phosphonic acid mono-ethylhexyl ester is preferred as extraction agent.

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