Polyester is the most produced textile fiber on planet Earth. Of the world’s 8GTpa of oil and gas production, 80MTpa, or 1% ends up as PET, via eleven chemical processing stages that span naphtha-reforming, BTX separation into paraxylene, oxidation to PTA, plus ethane cracking, ethylene oxide and ethylene glycol. This data file covers the polyester production process, step by step, including mass balances and reaction conditions.