Method for separating metals by micellar ultrafiltration that ca

Details Method for separating metals by micellar ultrafiltration that ca Method for separating metals by micellar ultrafiltration that ca

1998-12-16

2000-09-05

Fortuna, Ana

Liquid purification or separation

Processes

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

210638, 210650, 423 2, B01D 6100

Patent

active

061137960

ABSTRACT:
The present invention relates to a method for separating metals by micellar ultrafiltration, that can be used to process radioactive waste.
This process consists of adding to the aqueous solution a complexing anionic surfactant having the formula: ##STR1## M.sup.+ =cation, for example NA.sup.+m=1 or 2
R=aliphatic group of at least eight carbon atoms, and optionally a nonionic surfactant such as Triton X-100 or Brij 35 to produce micelles (10) in the solution, and subsequently of filtering the solution through an ultrafiltration membrane (3) to retain the previously formed micelles.

REFERENCES:
patent: 4014787 (1977-03-01), Shorr
patent: 5525232 (1996-06-01), Veiro et al.
patent: 5766478 (1998-06-01), Smith et al.

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