T/CPCIF 0081-2021 Polycarboxylic acid (PTA)

Scope

Scope: This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and safety requirements for purified terephthalic acid (PTA). This document applies to purified terephthalic acid (PTA) obtained by oxidation and refinement from p-xylene as a raw material. Main technical contents: Item Unit Indicator Appearance — White powder Acid value (calculated as potassium hydroxide) mg/g 675 ± 2 Paracarboxybenzaldehyde mg/kg ≤ 25 Value of paracarboxybenzaldehyde and p-methylbenzoic acid mg/kg ≤ 190 Combustion residue mg/kg ≤ 5 Total heavy metals (molybdenum, chromium, nickel, cobalt, manganese, iron) mg/kg ≤ 2 Iron mg/kg ≤ 1 Cobalt mg/kg ≤ 1 Water content (mass fraction) ≤ 0.2% b* value a — Target value ± 0.3 Particle size distribution μm Target value ± 20 ΔY ≤ 10 a: The b* value is a target value agreed upon by both the supplier and the buyer, with an indicator range of ± 0.3 (inclusive). b: The particle size distribution is a target value agreed upon by both the supplier and the buyer (such as the target value of the median particle size), with an indicator range of ± 20 μm (inclusive).

Development Information

Related Standards