Several pre-concentration and separation techniques are known, as well as the cloud point extraction (CPE). In order to optimize the operation of a coacervate extraction process, it is extremely important to take into account, on the one hand, the choice of the surfactant, which must be the most efficient and, on the other hand; and to know well the evolution of the factors that governs the effectiveness of this technique.

Investigations on the extraction of cupric ions by Triton X-100, the ionic liquid denoted LIM and the potassium nitrate (KNO₃) were produced using the technique of extraction by cloud point (coacervat). The extraction experiments showed that the cupric ions were extracted with the following optimal parameters: pH 2.0; Concentration of LIM equal to 0.08M; Triton X-100 mass ratio equal to 0.1%; KNO₃ mass ratio equal to 1%; at ambient temperature.