Refining of a rare earth including a process for separation by a

Details Refining of a rare earth including a process for separation by a Refining of a rare earth including a process for separation by a

1990-10-09

1992-04-14

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210652, 210661, 210663, 210688, 210805, 210912, B01D 1504

Patent

active

051045443

ABSTRACT:
The invention is concerned with a process of separation and refining of rare earths in which a dilute solution of rare earths, resulting from the step of separating and refining the rare earths by using an ion exchanger, is subjected to reverse osmosis membrane separation treatment to concentrate the solution and reduce its volume, while the water which has passed through the membrane is circulated for reuse in the step of separating and refining the rare earths.

REFERENCES:
patent: 4206048 (1980-06-01), Guter
patent: 4693828 (1987-09-01), Yoshioka et al.
patent: 4770784 (1988-09-01), Davis et al.

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