Standard Test Method for Determination of 4-Carboxybenzaldehyde and p-Toluic Acid in Purified Terephthalic Acid by Weak Anion Exchange High Performance Liquid Chromatography

Importancia y uso:

4.1 The presence of 4-CBA and p-TOL in PTA used for the production of polyester is undesirable because they can slow down the polymerization process, and 4-CBA is also imparting coloration to the polymer due to thermal instability.

4.2 Determining the amount of 4-CBA and p-TOL remaining from the manufacture of PTA is often required. This test method is suitable for setting specifications and could be used as an internal quality control tool where these products are produced or are used.

Subcomité:

D16.02

Referida por:

D7976-14R20, D8062-23

Volúmen:

06.04

Número ICS:

71.080.40 (Organic acids)

Palabras clave:

purified terephthalic acid; 4-Carboxybenzaldehyde; p-Toluic acid; high performance liquid chromatograph; weak anion exchange HPLC;