DOP-shaped oil is one of the most important plasticizers of PVC powder. This material is produced in a reactor equipped with a stirrer in the vicinity of the para-toluene catalyst, sulfonic acid PTSA as a batch. The production time of each batch is about 12 hours and the production method is discontinuous. The quality of this product is much more up-to-date than the continuous method. DOP production processes include stroke, excess alcohol recycling, and product smoothing.