Liquid-liquid extraction process of metals

Details Liquid-liquid extraction process of metals Liquid-liquid extraction process of metals

1974-12-17

1977-09-27

Carter, Herbert T.

Chemistry of inorganic compounds

Extracting, leaching, or dissolving

75101BE, 210 22R, 210 23R, 210 24, 210 38B, 423 8, 423 24, 423 54, 423 63, 423 99, 423 70, 423 89, 423112, 423139, 423 22, 423 21, 23267R, 23267A, B01D 1104

Patent

active

040512304

ABSTRACT:
In this process metal ions such as Ag.sup.+, Pb.sup.2+, Co.sup.2+, Cu.sup. 2+, Fe.sup.3+, etc., are extracted through a porous membrane impregnated with the first extractant containing chelating agents. The membrane contacts with an extraction feed on one side, and with the second extractant on the other side, and the objective metal ions are transferred from the feed to the second extractant. Throughout the extraction process, the pH values of the extraction feed, the impregnated extractant solution, and the second extractant are kept in decreasing order.
An apparatus used for the above objective is also provided by this invention.

REFERENCES:
patent: 3228877 (1966-01-01), Mahon
patent: 3450631 (1969-06-01), Block et al.
patent: 3718583 (1973-02-01), Wu et al.
patent: 3779907 (1973-12-01), Li et al.
patent: 3872001 (1975-03-01), Davis et al.

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