METHOD OF EXTRACTING IONS FROM AQUEOUS SOLUTIONS Russian patent published in 2017 - IPC C22B3/26 C22B11/00 C22B19/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of extracting metal ions from aqueous solutions and can be used in non-ferrous and ferrous metallurgy, as well as for cleaning industrial and household wastes. Method of extracting metal ions from aqueous solutions with tributyl phosphate includes preparation of initial solution and extraction agent, contacting solution and extraction agent and phase separation. Extraction is carried out from chloride solutions, containing soluble chloride complexes of gold, silver, zinc and iron ions, with concentration of 2–3 n. HCl and 240 g/dm³ NaCl. Extraction is carried out at stage-feeding of portions at ratio O:W = 1:5 for 10 minutes at each stage. Extraction of gold ions and iron ions is carried out at 60 °C. Extraction of silver ions and zinc ions is carried out at temperature 20 °C.

EFFECT: technical result consists in improvement of kinetic characteristics of process and degree of extraction of extractable substance, as well as in reduction of extractant consumption.

3 cl, 5 dwg, 16 tbl, 5 ex