Abstract: The present invention relates to a process for producing polyesters displaying exceptionally low acetaldehyde concentrations and good clarity comprising the steps of:polycondensing in the melt phase, a polyester monomer/oligomer mixture under conditions sufficient to form a precursor having in intrinsic viscosity less than 75% of a possible maximum intrinsic viscosity; andsolid stating said precursor under conditions sufficient to increase said intrinsic viscosity at least about 0.05 dl/g.

Abstract: This invention relates to a three step process for preparing copolyesters exhibiting a neutral hue, high clarity and increased brightness. The process involves reacting terephthalic acid, ethylene glycol, and 1,4-cyclohexanedimethanol in a feed mole ratio of total glycols to dicarboxylic acid of 1.7:1 to 6.0:1, at a temperature of 240.degree. C. to 280.degree. C., and a pressure of 15 psig to 80 psig to form an esterification product; adding a polycondensation catalyst and a toner; and polycondensing the product at a temperature of 260.degree. C. to 290.degree. C. and a reduced pressure to form a high molecular weight copolyester.