Method for pretreating blended fibers, depolymerization comprising the pretreatment and preparation of terephthalic acid comprising the pretreatment

Abstract

The present invention relates to a process for pretreating a blended textile and to a process for depolymerization and process for preparing terephthalic acid comprising the same. Specifically, according to an embodiment of the present invention, a blended textile comprising polyester fibers and polyurethane fibers is brought into contact with an organic solvent, whereby the change in content of the polyurethane fibers contained in the blended textile according to Equation