Standard Test Method for Determination of 4-Carboxybenzaldehyde and p-Toluic Acid in Purified Terephthalic Acid by Reverse Phase 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 affect the PET quality (such as contribute to fiber breaks), the polymerization process, and 4-CBA imparts 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 for use 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:

4-Carboxybenzaldehyde; high performance liquid chromatograph; purified terephthalic acid; p-Toluic acid; reverse-phase HPLC;