What are the six basic petrochemicals?

News 2025-04-07

1. Ethylene (C₂H₄)

  • Primary Use: The most important petrochemical, used to make:
    • Plastics: Polyethylene (PE) for packaging, bottles.
    • Chemicals: Ethylene oxide (antifreeze), PVC, polystyrene.
  • Production: Steam cracking of naphtha or ethane.

2. Propylene (C₃H₆)

  • Primary Use: Key for:
    • Plastics: Polypropylene (PP) for textiles, automotive parts.
    • Chemicals: Acrylonitrile (synthetic fibers), propylene oxide (foams).
  • Production: Byproduct of ethylene cracking or fluid catalytic cracking (FCC).

3. Butadiene (C₄H₆)

  • Primary Use: Essential for:
    • Synthetic Rubber: Styrene-butadiene rubber (SBR) for tires.
    • Plastics: ABS (used in electronics, automotive parts).
  • Production: Extracted from C₄ streams in refineries.

4. Benzene (C₆H₆)

  • Primary Use: Aromatic hydrocarbon used in:
    • Plastics: Polystyrene, nylon.
    • Chemicals: Detergents, dyes, pharmaceuticals.
  • Production: Catalytic reforming of naphtha.

5. Toluene (C₇H₈)

  • Primary Use: Important for:
    • Solvents: Paints, adhesives.
    • Chemicals: TNT (explosives), benzene production.
  • Production: Refined from crude oil or catalytic reforming.

6. Xylene (C₈H₁₀, mixed isomers)

  • Primary Use: Key in:
    • Plastics: PET (polyethylene terephthalate) for bottles.
    • Chemicals: PTA (purified terephthalic acid) for polyester fibers.
  • Production: Catalytic reforming and distillation.