catalytic to produce poly (ethylene terephthalate) from terephthalic acid and ethylene glycol, and process for this composition.

Process for the production of poly (ethylene terephthalate) from terephthalic acid and ethylene glycol, comprising the steps of: (a) preparing a catalyst composition consisting of an antimony compound, being present such that the antimony content elemental is comprised in a range from about 15 ppm to less than 150 ppm, and a zinc compound, being present such that the content of elemental zinc is in a range of about 50 to about 160 ppm, where ppm amounts by weight are based on the theoretical yield of poly (ethylene terephthalate); (B) providing the catalyst composition, terephthalic acid and ethylene glycol in a vessel; and (c) reacting the terephthalic acid and ethylene glycol in an esterification step and a polycondensation step to obtain poly (ethylene terephthalate).