[en] DP-8R and LIX 860 extractants diluted with Exxsol D100 was used to co-extract cobalt and nickel from sulphate aqueous media. The influence of equilibration time, temperature, equilibrium pH and extractants mixture concentration on the extraction of both metals has been studied. It was observed that neither cobalt nor nickel extraction is sensitive to temperature, reaching in both cases the extraction equilibrium within 5 min of contact however nickel is extracted preferably to cobalt at slightly acidic pH values and also using various extractants mixture concentrations. For a solution containing 2 g/l each of cobalt and nickel and initial pH value of 5,5 conditions were established for the co-extraction of both metals and selective stripping (with H₂SO₄) of cobalt and nickel. Using the appropriate extractants concentrations the yield (extraction stage) for both metals is near 90% whereas the percentage of cobalt and nickel stripping is almost also quantitative. (Author) 15 refs