중축합에 의한 PET 폴리에스터 생산

음료 병에서 섬유까지

Petrochemical & Refining Global Industrial Scale $55 billion

개요

Polyethylene terephthalate (PET) is produced by polycondensation of ethylene glycol with terephthalic acid (PTA). PET is the world's most recycled plastic, used for beverage bottles, food packaging, and polyester textile fibers. The two-stage process involves esterification followed by melt polycondensation under vacuum. Global PET production exceeds 90 million tons annually, with approximately 70% used for fibers and 30% for packaging.

화학 공정

Purified terephthalic acid (PTA) is esterified with ethylene glycol (EG) at 240-260 degrees C to form bis(2-hydroxyethyl) terephthalate (BHET). The BHET undergoes melt polycondensation at 270-290 degrees C under high vacuum (<1 mbar) using antimony trioxide catalyst, removing ethylene glycol to build molecular weight. Solid-state polymerization (SSP) further increases IV for bottle-grade resin.

nHOOC-C₆H₄-COOH + nHOCH₂CH₂OH →[Sb₂O₃, 280 degrees C, vacuum] −(OC-C₆H₄-CO-OCH₂CH₂O)ₙ− + (2n-1)H₂O

원자재

  • Purified terephthalic acid (PTA, C₈H₆O₄) — Oxidation of p-xylene (Diacid monomer)
  • Ethylene glycol (C₂H₆O₂) — Hydration of ethylene oxide (Diol monomer)
  • Antimony trioxide (Sb₂O₃) — Mining and smelting (Polycondensation catalyst)

최종 제품

  • PET resin (chips/pellets) — Bottles, packaging, polyester fibers (IV 0.60-0.84 dL/g depending on grade)
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Environmental Impact

PET is the most recycled plastic with established mechanical and chemical recycling infrastructure. However, production from fossil feedstocks contributes to CO₂ emissions. Antimony catalyst traces in PET have raised health concerns. Microfiber shedding from polyester textiles is a growing environmental issue.

안전 고려사항

최근 혁신

Bio-based PET using plant-derived ethylene glycol and furandicarboxylic acid (PEF) as a drop-in replacement is in commercial development.
Enzymatic depolymerization by PETase enzymes enables closed-loop chemical recycling under mild conditions.

생산 규모

90000000

톤/년

$55 billion

시장 가치

더 보기: Petrochemical & Refining

폴리에틸렌 중합

Global Industrial Scale

고옥탄가 가솔린을 위한 접촉 개질

Global Industrial Scale

에틸렌 생산을 위한 스팀 분해

Global Industrial Scale

지글러-나타 촉매법에 의한 폴리프로필렌 생산

Global Industrial Scale

합성 연료를 위한 피셔-트롭시 합성

Commercial Production

원유 분별 증류

Global Industrial Scale

은 촉매 산화에 의한 에틸렌 옥사이드 생산

Global Industrial Scale

Frequently Asked Questions

What industry uses 중축합에 의한 PET 폴리에스터 생산?
중축합에 의한 PET 폴리에스터 생산 is used in the petrochemical & refining sector at global industrial scale scale.
What process is involved in 중축합에 의한 PET 폴리에스터 생산?
Purified terephthalic acid (PTA) is esterified with ethylene glycol (EG) at 240-260 degrees C to form bis(2-hydroxyethyl) terephthalate (BHET). The BHET undergoes melt polycondensation at 270-290 degrees C under high vacuum (<1 mbar) using antimony trioxide catalyst, removing ethylene glycol to buil
What is the economic significance of 중축합에 의한 PET 폴리에스터 생산?
중축합에 의한 PET 폴리에스터 생산 has a market value of $55 billion and annual production of 90,000,000 tons.
What is the environmental impact of 중축합에 의한 PET 폴리에스터 생산?
PET is the most recycled plastic with established mechanical and chemical recycling infrastructure. However, production from fossil feedstocks contributes to CO₂ emissions. Antimony catalyst traces in PET have raised health concerns. Microfiber shedding from polyester textiles is a growing environme
What raw materials are used in 중축합에 의한 PET 폴리에스터 생산?
The main raw materials include: Purified terephthalic acid (PTA, C₈H₆O₄), Ethylene glycol (C₂H₆O₂), Antimony trioxide (Sb₂O₃).