| abstract |
(57) [Problem] To provide a method for producing polyethylene terephthalate having good hue and excellent transparency and suitable for bottle use. SOLUTION: Polyethylene terephthalate is produced by using a polyester polymerization apparatus comprising an esterification reaction apparatus comprising a plurality of continuous esterification tanks, a liquid phase polycondensation reaction apparatus, and, if necessary, a solid phase polymerization reaction apparatus. In producing, a slurry containing terephthalic acid, ethylene glycol and an antimony compound is supplied to a first esterification tank, and a phosphorus compound and, if necessary, a cobalt compound and / or a magnesium compound are supplied to a second and subsequent esterification tanks. Add to produce polyethylene terephthalate. |