Method for scrubbing amine-type extractant

Details Method for scrubbing amine-type extractant Method for scrubbing amine-type extractant

2011-08-23

2011-08-23

Douyon, Lorna M (Department: 1761)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C423S024000, C423S027000, C423S150100, C564S497000

Reexamination Certificate

active

08003066

ABSTRACT:
A method for scrubbing an amine extractant (A) containing an amine added with hydrochloric acid, and an amine binding a metal chloro complex ion, in a scrubbing stage constituting a solvent extraction step, characterized by substituting a chloride ion of the amine, which is added with hydrochloric acid, with sulfuric acid ion, by bringing the amine extractant (A) into contact with a sulfuric acid solution with a concentration of 3 to 10 N, and subsequently, by eliminating a metal by bringing the substituted amine extractant (B) into contact with water.

REFERENCES:
patent: 3903235 (1975-09-01), Cardwell et al.
patent: 6312500 (2001-11-01), Duyvesteyn et al.
patent: 6-43620 (1988-02-01), None
patent: 3844752 (2004-04-01), None
patent: WO2008/080209 (2008-10-01), None

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