nd perlites. The properties of good adsorbents for vegetable oil filtration and purification include high hydrophobicity, uptake efficiency, long retention time, easy oil recovery and adsorbent regeneration. Perlites are small particles of natural glass which contain a small amount of occluded water and are found in volcanic deposits. Raw perlite is a porous material and can be heated rapidly at 700–1200 oC to expand as much as five to eight times of their original volume. Expanded perlite is one of widely available aluminosilicate mineral, it has several advantages such as high porosity, excellent thermal and chemical stability, low bulk density, sheet-like appearance. Moreover, perlite shows thermal and chemical inertness and behaves friendly to the environment. These properties make in fact expanded perlite useful chemical in many industrial applications including liquid filtration. In this work it was studied the regeneration of the expanded perlite used in the purification of vegetable oil. The regeneration process simulation was performed using the thermal analysis method. Thermoanalytical curves (TG-DTG-DTA) were measured in a dynamic atmosphere of air at the heating rate 10 °C/min. The results indicated that the regeneration of perlite occurs in the range 180-550 °C, the process being performed in two consecutive steps, both of which are accompanied by strong exothermic effects. The first stage occurs in the range 180-410 oC, resulting in a mass loss of 38%, with an exothermic maximum at 365 oC. During this time the volatilization and oxidative degradation of adsorbed organic substances takes place. At 455 °C start the second stage of decomposition can be explained by the oxidation of the char formed in the previous stage and that has accumulated in the pores of the adsorbent. Final mass loss is 56% indicating a very high adsorption capacity of perlite. In conclusion it can be mentioned that the effective regeneration temperature of the perlite used in the process of purifying vegetable oils is 460-500 °C, this leads to recovery the perlite adsorption capacity and does not lead to blocking the pores with the char formed at lower temperatures.