チーグラー・ナッタ触媒法によるポリプロピレン製造

現代製造業を支える汎用プラスチック

Petrochemical & Refining Global Industrial Scale $95 billion

概要

Polypropylene (PP) is the second most produced plastic globally, valued for its excellent chemical resistance, low density, and versatile mechanical properties. Production uses highly stereospecific Ziegler-Natta catalysts (4th generation MgCl₂-supported TiCl₄) or metallocene catalysts to control the tacticity (isotactic, syndiotactic, or atactic) of the polymer chain. PP is used in packaging, textiles, automotive components, medical devices, and currency notes.

化学プロセス

Propylene is polymerized in gas-phase fluidized bed or bulk liquid-phase loop reactors at 60-80 degrees C and 25-35 bar using MgCl₂/TiCl₄/electron donor catalyst with AlEt₃ co-catalyst. The process achieves >98% isotacticity without the need for atactic polymer removal. Reactor powder is stabilized, compounded, and pelletized.

nCH₂=CH(CH₃) →[TiCl₄/MgCl₂, AlEt₃] −(CH₂−CH(CH₃))ₙ− (isotactic addition polymerization)

原材料

  • Propylene (C₃H₆) — Steam cracking co-product or propane dehydrogenation (Monomer)
  • 4th-gen Ziegler-Natta catalyst — Catalyst manufacturers (e.g., LyondellBasell, Grace) (Stereospecific catalyst)
  • Triethylaluminum (AlEt₃) — Chemical synthesis (Co-catalyst/activator)

最終製品

  • Polypropylene resin (pellets) — Packaging, automotive, textiles, medical (Homopolymer, random copolymer, and impact copolymer grades)
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Environmental Impact

PP production relies on fossil propylene feedstock. However, PP is one of the most recyclable thermoplastics and has the lowest density of commodity plastics, reducing transportation energy. End-of-life PP can be mechanically recycled or chemically recycled back to propylene.

安全性の考慮事項

最新のイノベーション

Metallocene catalysts enable production of PP with uniform molecular weight distribution and novel architectures.
Post-consumer recycled PP is being upgraded using reactive extrusion and advanced stabilization packages.

生産規模

80000000

トン/年

$95 billion

市場価値

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Frequently Asked Questions

What industry uses チーグラー・ナッタ触媒法によるポリプロピレン製造?
チーグラー・ナッタ触媒法によるポリプロピレン製造 is used in the petrochemical & refining sector at global industrial scale scale.
What process is involved in チーグラー・ナッタ触媒法によるポリプロピレン製造?
Propylene is polymerized in gas-phase fluidized bed or bulk liquid-phase loop reactors at 60-80 degrees C and 25-35 bar using MgCl₂/TiCl₄/electron donor catalyst with AlEt₃ co-catalyst. The process achieves >98% isotacticity without the need for atactic polymer removal. Reactor powder is stabilized,
What is the economic significance of チーグラー・ナッタ触媒法によるポリプロピレン製造?
チーグラー・ナッタ触媒法によるポリプロピレン製造 has a market value of $95 billion and annual production of 80,000,000 tons.
What is the environmental impact of チーグラー・ナッタ触媒法によるポリプロピレン製造?
PP production relies on fossil propylene feedstock. However, PP is one of the most recyclable thermoplastics and has the lowest density of commodity plastics, reducing transportation energy. End-of-life PP can be mechanically recycled or chemically recycled back to propylene.
What raw materials are used in チーグラー・ナッタ触媒法によるポリプロピレン製造?
The main raw materials include: Propylene (C₃H₆), 4th-gen Ziegler-Natta catalyst, Triethylaluminum (AlEt₃).