In the paper is presented the researches about establishing the macrokinetics mechanisms and the mathematical of the copper extraction from spent catalyst Cu-Mg-Al2O3 process. The influence of temperature on the global speed of the process researches and the experimental results arc presented. The experimental results lead to the conclusion that the global speed of the process is getting higher along with the temperature rising as long as the stability of the copper-ammonia complex it isn`t affected.
