Hexafluoropropylene oxide (HFPO),  CAS number:428-59-1, its structure contains six fluorine atoms and an epoxy group, which makes it an important intermediate in fluorine fine chemicals. And due to its highly reactive cyclic structure, HFPO can participate in various reactions, such as self-polymerization, rearrangement to form hexafluoroacetone, reaction with acyl fluorides to produce perfluoroalkyl vinyl ethers. Its low boiling point, high reactivity, also make it widely used in organic synthesis and the fluorochemical industry, particularly in the production of perfluorosulfonic acid ion-exchange resins.

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📋Basic information:

• Chemical name: Hexafluoropropylene oxide
• CAS: 428-59-1
• Molecular Formula: C3F6O
• Molecular Weight: 166.02

📌Specification:

📊Main Synthesis Route

Industrially, the main production method uses hexafluoropropylene (HFP) as the raw material and employs the molecular oxygen liquid-phase oxidation process, which is the most common approach. In this method, HFP reacts with oxygen (O₂) in the presence of a solvent and catalyst to produce HFPO. This process features a short production route and high efficiency.

Other methods include organic peroxide oxidation, electrochemical oxidation, and carbonate‑chlorine oxidation.

🧩Application of 9-phenanthrenylboronic acid CAS No.: 68572-87-2

HFPO is the core raw material for high-end products such as fluorinated vinyl ethers, perfluoropolyether oils, perfluorosulfonic acid resins, and hexafluoroacetone. Its downstream applications span high-end sectors including electronics, new energy, aviation, and pharmaceuticals.

1. Synthesis of Fluorinated Vinyl Ethers

Reaction with acyl fluorides / sultones to produce perfluoroalkyl vinyl ethers (e.g., PPVE, PSVE, PMVE, PEVE), which serve as comonomers for tetrafluoroethylene (TFE) in the production of:

• Melt-Processable Polytetrafluoroethylene (PFA): Offers high and low temperature resistance, corrosion resistance, and electrical insulation. Used in semiconductors, chemical piping, and aviation cables.
• Perfluoroelastomer (FFKM): Provides reliable sealing under extreme conditions. Used in semiconductor, nuclear power, and aviation industries.
• Perfluorosulfonyl Fluoride Resin (Nafion-type): Used in proton exchange membranes for fuel cells, membranes for chlor-alkali electrolyzers, and water treatment membranes.

2. Perfluoropolyether (PFPE) Lubricating Oil / Grease

HFPO self-polymerizes to form perfluoropolyethers (e.g., Krytox, Fomblin), which feature:

• Temperature resistance from -60°C to 250°C, Non-flammability, Chemical inertness,No coking / carbon deposit formation
• Applications: Semiconductor vacuum equipment, aviation engines, nuclear industry, precision instruments, high-temperature bearings

3. Hexafluoroacetone (HFA) and Hexafluoroisopropanol (HFIP)

HFPO undergoes Lewis acid-catalyzed rearrangement to form hexafluoroacetone, which is then hydrogenated to produce hexafluoroisopropanol.

Applications: Pharmaceutical / pesticide intermediates, electronic-grade cleaning agents, photoresist solvents, fuel cell additives

4. Fluorosurfactants and Fine Chemicals

• Synthesis of low-foaming, high-surface-activity perfluorinated surfactants for use in firefighting foams, coatings, inks, and electronic cleaning
• Preparation of fluorinated pharmaceutical intermediates, fluorinated pesticides, and fluorinated functional materials

5. Other High-End Application Fields

• Electronics & Semiconductors: High-purity cleaning agents, etching gases, CVD precursors
• New Energy: Fuel cells, lithium battery electrolyte additives
• Aerospace: Seals, lubricants, and insulating materials resistant to extreme environments
• Pharmaceuticals: Fluorinated drugs, contrast agents, surgical instrument coatings

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