One of the most important crops worldwide is the citrus. In 2011, Mexico provided 5.86% of the world production of oranges, generating approximately a million tons of orange residuals. It is significant to obtain essential oil from these residuals because its market value is of 70 dollars/kg. However, a process like this requires a series of optimizations in areas such as residuals, energy costs and optimum use of raw material. Commonly, simulation software is utilized to model more complex processes, like organics, which simulation implies a high number of difficulties, because it is hard to predict their behavior. Therefore, a simulation in Aspen Plus® using equivalence models was developed, utilizing residual orange peel as raw material. The extraction occurs through hydrodistillation, technique that requires auxiliary services such as water heating, a product condenser and finally, a decanter at environmental conditions to separate the desired product. The diagram and the characteristics of each process step are described. Due to the nature of the extraction methods, two equivalence models were realized, one for orange peel and the other for essential oil. The basis of the simulation in relation to the representative compounds of the processed material is also presented, having a production of 72.134 g of essential oil, equivalent to a yield of 4.5% w/w. The energy index was estimated at 70.5 W/g of produced essential oil.