The feedstock chain behind polyester, nylon 6, acrylic and PVA: paraxylene and purified terephthalic acid, monoethylene glycol, caprolactam, acrylonitrile and polyvinyl alcohol. Bulk petrochemicals ship in ISO tanks, road or rail tankers and 25 kg bags, with specification limits set to the Chinese national standards the plants produce to and a COA per lot.
The aromatic head of the polyester chain: PX is oxidised to PTA, which is then condensed with MEG to make PET. Supplied as a liquid — melting point 13.2 °C, so heated or insulated tanks are required — from UOP and IFP ELUXYL units.
| Grade | Typical specification | Packing | Typical applications |
|---|---|---|---|
| Paraxylene, premium grade | Purity ≥99.7% (m/m), non-aromatics ≤0.10%, toluene ≤0.10%, ethylbenzene ≤0.20%, colour ≤10 Pt-Co, total sulfur ≤1.0 mg/kg | Bulk — ISO tank / tanker | PTA production; chemical and pharmaceutical intermediates |
| Paraxylene, first grade | Purity ≥99.5% (m/m), ethylbenzene ≤0.30%, colour ≤10 Pt-Co, total sulfur ≤2.0 mg/kg | Bulk — ISO tank / tanker | PTA production |
PX is a flammable, toxic liquid and a regulated dangerous good for sea transport; heated tank availability and destination import requirements are confirmed at quotation.
White acicular crystal or powder, more than 90% of world PTA going into PET for fibre, film and bottle resin. Specification is controlled on acid value, 4-CBA and metal content, which is what decides colour and spinning performance downstream.
| Grade | Typical specification | Packing | Typical applications |
|---|---|---|---|
| PTA, premium grade | Acid value 675±2 mgKOH/g, 4-CBA ≤25 mg/kg, ash ≤15 mg/kg, total metals ≤10 mg/kg, iron ≤2 mg/kg, moisture ≤0.3% | 1.1mt jumbo bag / 25kg bag / bulk vessel | Polyester fibre, film and bottle chip (PET); PTT and PBT |
| PTA, first grade | Acid value 675±2 mgKOH/g, 4-CBA ≤25 mg/kg, ash ≤15 mg/kg, moisture ≤0.5% | 1.1mt jumbo bag / 25kg bag / bulk vessel | Polyester fibre and resin production |
PTA dust is explosive and the product is flammable: bagged cargo is shipped in lined jumbo bags or 25 kg bags, and bulk parcels in dedicated vessels. Particle-size distribution is agreed between buyer and supplier.
Fibre-grade glycol for PET polymerisation, also the base for antifreeze and coolants. Hygroscopic — tanks and drums must stay sealed, and water content is the specification that matters most in transit.
| Grade | Typical specification | Packing | Typical applications |
|---|---|---|---|
| MEG, premium grade | Purity ≥99.9%, water ≤0.1%, colour ≤5 Pt-Co, acidity ≤0.002%, DEG + TEG ≤0.1%, density 1.1128–1.1138 g/cm³ | Bulk — ISO tank / tanker | Polyester fibre and PET resin; antifreeze and industrial coolants |
| MEG, first grade | Water ≤0.2%, colour ≤15 Pt-Co, acidity ≤0.005%, DEG + TEG ≤1.0% | Bulk — ISO tank / tanker / drum | Polyester polymerisation; antifreeze blends |
Dedicated stainless or aluminium tanks labelled for glycol service; residual-liquid checks are required before loading. Drums and IBCs are available for smaller parcels.
The monomer for nylon 6 fibre and engineering resin. Supplied as a flake in nitrogen-flushed foil compound bags — moisture pick-up and colour are what determine spinning performance.
| Grade | Typical specification | Packing | Typical applications |
|---|---|---|---|
| Caprolactam | Crystallisation point ≥69.0 °C, 50% solution colour ≤3 Hazen, permanganate absorption ≤5, volatile bases ≤0.4 mmol/kg, UV absorbance at 290 nm ≤0.04 | 25kg nitrogen-flushed aluminium-foil compound bag | Nylon 6 filament, staple and engineering resin; also used in lysine and pharmaceutical synthesis |
Packed 25 ±0.25 kg per bag, inner bag heat-sealed under nitrogen. Not classified as a dangerous chemical for transport; store cool and dry, away from acids and oxidants.
The monomer behind acrylic fibre, ABS and SAN, and a route into acrylamide and adiponitrile. A flammable, toxic liquid shipped in bulk with inhibitor added.
| Grade | Typical specification | Packing | Typical applications |
|---|---|---|---|
| Acrylonitrile | Purity ≥99.5%, water 0.20–0.45%, colour ≤5 Pt-Co, total aldehyde ≤30 mg/kg, total cyanogen ≤5 mg/kg, peroxide ≤0.2 mg/kg, iron ≤0.1 mg/kg | Bulk — ISO tank / 200kg drum | Acrylic fibre, ABS / SAN resin, acrylamide, adiponitrile and acrylic esters |
AN is a class 3 flammable toxic liquid: shipped under UN 1093 with inhibitor, in dedicated stainless or coated tanks. MSDS, DG declaration and destination import permits are confirmed before booking.
Water-soluble polymer supplied by alcoholysis degree and viscosity: partially hydrolysed grades for adhesives, coatings and paper sizing, fully hydrolysed grades for vinylon fibre, PVB resin and high-strength bonding.
| Grade | Typical specification | Packing | Typical applications |
|---|---|---|---|
| PVA 088-05 (low polymerisation) | Alcoholysis 87.0–89.0 mol%, viscosity 4.5–6.0 mPa·s, purity ≥93.5%, ash ≤0.5% | 25kg PP woven bag, PE liner | Paper adhesives, re-wetting adhesives, textile sizing, emulsion polymerisation stabiliser |
| PVA 088-20 (17-88 type) | Alcoholysis 87.0–89.0 mol%, viscosity 20.5–24.5 mPa·s, purity ≥93.5%, ash ≤0.5% | 25kg PP woven bag, PE liner | Adhesives, building coatings, water-soluble film, paper surface sizing |
| PVA 096-27 (17-97 type) | Alcoholysis 96.0–98.0 mol%, viscosity 23.0–29.0 mPa·s, purity ≥93.5%, ash ≤0.5% | 25kg PP woven bag, PE liner | Vinylon fibre, PVB resin, high-strength adhesives, textile sizing |
More than twenty alcoholysis / viscosity combinations are produced; the grade is matched to your dissolution temperature and target film strength. Packed 25 kg net in PP woven bags with a PE inner liner; keep dry.
We will come back with an equivalent, a landed price and a lead time.
