Societe Nationale Elf Aquitaine

Rhone-poulenc Specialites Chimiques

Denise Bauer

Jean-Louis Sabot

Jacques Tellier

Patrick Fourre

Jacques Komornicki

Liquid-liquid extraction of a substance from an aqueous solution thereof, which consists in preparing a microemulsion of this solution with a hydrophobic liquid in such a way that the layer of microemulsion is accompanied by a layer of consumed aqueous solution and a layer of hydrophobic liquid containing the substance to be extracted.

Liquid-liquid extraction with the aid of microemulsions of substances

Gallium values are extracted and recovered from basic aqueous solutions thereof, notably from sodium aluminate solutions of Bayer process origin, by liquid/liquid extraction thereof with a water immiscible organic phase comprising an organic solvent having dissolved therein an organic-soluble substituted hydroxyquinoline and at least one organic-soluble organophosphorus compound comprising at least one acid function.

Liquid/liquid extraction of gallium values from basic aqueous solutions

Extraction of a metal compound from an aqueous solution by means of a hydrophobic liquid, with the production of a microemulsion; the aqueous solution has a pH of about 0.5 to 8; the surfactant employed for formation of the microemulsion is nonionic or anionic.

Process of liquid-liquid extraction of metals, with the aid of a

Gallium values are extracted and recovered from basic aqueous solutions thereof, notably from sodium aluminate solutions of Bayer process origin, by liquid/liquid extraction thereof with a water immiscible organic phase comprising an organic solvent having dissolved therein an organic-soluble substituted hydroxyquinoline and at least one organic-soluble organosulfate or organosulfonate comprising at least one acid function, either in the free acid or salt form thereof.

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Le Raincy, France

Denise Bauer