Process for producing polyester, polyester produced using said process, and polyester molded product

The invention claims a obtain the polyester resin composition is as follows of the compact, comprising: The comprising the compound of the polyester condensation catalyst of the polyester, wherein the aluminium compound, wherein the aluminium compound of the pure water of the aluminium element amount of the 2.7g/l, and pool length of the compound of extinction of an aqueous solution of a wavelength of claims 1cm and preparing method of the is below 0.0132, adjusting the aluminium compound, a is as the transparency, or thermostability. Further condensing the speed is fast, the foreign matter according and condensation catalyst of claim 1-7, wherein the transparent film or the polyacrylamide with ultrahigh transparent The method Xingti for the fields of the super fine fibre and use a display wherein the polyester resin composition of the efficient and proper attention to twoThe compact.