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Purified terephthalic acid PTA
Crude terephthalic acid (CTA) is obtained by catalytic oxidation of paraxylene with oxygen contained in compressed air. In the next step, purified terephthalic acid PTA is obtained by catalytic hydrogenation of impurities contained in CTA.
Application
Purified terephthalic acid (PTA) is used for manufacturing polyethylene terephthalate (PET), polyester fibres, polyamide fibres, films and plasticizers (DOTP).
Specifications
| Parameter | Unit | Values | Testing method ORLEN Laboratorium |
| Appearance | - | white powder | Method nr 122 |
| Acid value, | mg KOH/g | od 673 do 677 | Method nr 130 |
| Ash residue, max. | ppm (m/m) | 4 | Method nr 132 |
| Metal content (Co, Mn, Fe, Ni, Cr), max. | ppm (m/m) | 0.5 | Method nr 118 |
| Iron content, max. | ppm (m/m) | 0.2 | Method nr 118 |
| 4-Carboxybenzaldehyde (4-CBA) content, max. | ppm (m/m) | 15 | Method nr 119 |
| p-Toluic acid (p-TA) content, max. | ppm (m/m) | 150 | Method nr 131 |
| Alkaline transparency T400, min. | % | 97 | Method nr 117 |
| B colour, max. | - | 1.2 | Method nr 128 |
| Delta y value, max. | - | 5 | Method nr 129 |
| Solid particle-size distribution Dp50 (wet-sieving), | μm | 95 ± 15 | Method nr 133 |
| Water content, max. | % (m/m) | 0.2 | Method nr 127 |
| Pt-Co colour, max. | APHA | 10 | Method nr 126 |
Sales contact
Marta Żbikowska
Telephone:
+48 24 256 66 18
+48 665 650 926
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