Air coolers are exchangers in which the process fluid is cooled by air flow. In these converters, hot vapors are distributed in a set of tubes that are placed horizontally together. The outer wall of these tubes is equipped with Fin to increase the level of heat transfer between vapors and cool air. These converters are cross-current in terms of flow, where the air flow necessary to cool the vapors inside the tube is provided by a fan. If this fan is placed above the tubes, the converter is called Induced and if it is below the tubes, it is called Forced. Induced type is more efficient than Forced type due to uniform distribution of air flow in equal conditions. Among other advantages of this type of converters, we can mention the non-use of water, which is important in reducing process costs. Air coolers are used in many units such as paraxylene, PTA, MTBE, EDC / VCN