Process for preparing DOTP (dioctyl terephthalate) from waste polyester cloth

The invention discloses a process for preparing DOTP from waste polyester cloth, and belongs to the technical field of production of plasticizers. According to the technical scheme, the method comprises the following steps: shredding picked waste polyester cloth to obtain cloth waste; squeezing the cloth waste into a columnar object; and carrying out ester exchange reaction on the cloth of the column and isooctanol under the action of a catalyst to produce DOTP. According to the invention, the waste polyester cloth is treated into columns for producing DOTP, on one hand, the columns are convenient to feed, and the production efficiency is high; and meanwhile, compared with a process for treating the polyester waste cloth into granular throwing materials, the process disclosed by the invention has the advantages that the energy consumption is greatly reduced, and the production cost is reduced. 本发明公开了一种利用涤纶废布制备DOTP的工艺，属于增塑剂的生产技术领域。其技术方案为：包括以下步骤：将挑拣好的涤纶废布撕碎，得到碎布；将碎布挤成柱状物；柱状物的布料与异辛醇在催化剂作用下进行酯交换反应，生产DOTP。本发明将涤纶废布