Process for recovery of gallium

Details Process for recovery of gallium Process for recovery of gallium

C - Chemistry, Metallurgy

22

B

C22B 58/00 (2006.01) C22B 3/26 (2006.01) C22B 3/36 (2006.01)

Patent

CA 2480808

The present invention relates to a process for the recovery of gallium from Bayer process liquors. Bayer process liquor is obtained from alumina industries and contains 450g/L Na2O, 80g/L Al2O3 and 190 .plusmn. 20 ppm of gallium. The present invention utilizes an organic and inorganic phase for a two stage separation process to recover gallium with high purity. The first organic phase comprises 7-(4-ethyl-1-methyloctyl)-8-hydroxyquindine, iso- decanol, versatic 10 and kerosene and the second phase tricaprylmethyl- ammonium chloride, iso-decanol and kerosene.

La présente invention concerne un procédé de récupération de gallium à partir de liqueurs Bayer. La liqueur Bayer est issue des industries de l'alumine et contient 450 g/L de Na¿2?O, 80 g/L d'Al¿2?O¿3? et 190 .plusmn. 20 ppm de gallium. Cette invention utilise une phase organique et inorganique dans un processus de séparation en deux étapes pour la récupération de gallium à haut degré de pureté. La première phase organique contient de la 7-(4-éthyl-1-méthyloctyl)-8-hydroxyquindine, de l'isodécanol, du versatic 10 ainsi que du kérosène et la seconde phase contient du chlorure de tricaprylméthyl-ammonium, de l'isodécanol et du kérosène.

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