Hexafluoropropylene, as an important fluorinated olefin feedstock, is relatively chemically stable at room temperature. However, under industrial conditions such as high temperature, oxygen‑enriched atmospheres, and specific catalysis, it can undergo directed oxidation reactions, which also serve as the core reaction pathway for the industrial production of hexafluoropropylene oxide.
This oxidation reaction takes hexafluoropropylene and oxygen as the main reactants. In the reaction system, besides the target product hexafluoropropylene oxide, various by‑products such as carbonyl fluoride, trifluoroacetyl fluoride, and perfluoroisobutylene are simultaneously generated, along with trace amounts of hydrogen fluoride and fluorinated oligomers. The overall reaction composition is complex, the reaction rate is rapid, and the product concentrations fluctuate dynamically, making it a typical high‑risk, complex gas‑phase reaction system in the fine fluorochemical industry.
Due to the inherent characteristics of the above-mentioned hexafluoropropylene oxidation production system, this process inevitably presents numerous detection difficulties.
Detection Difficulties:
● The media generated by the reaction, such as carbonyl fluoride and hydrogen fluoride, are highly corrosive, which can easily damage conventional detection pipelines, sensing elements, and analytical equipment, significantly increasing the equipment failure rate.
● The system contains highly toxic and hazardous substances like perfluoroisobutylene, posing significant safety risks for manual off-line sampling and making sampling operations highly dangerous.
● There is a wide variety of oxidation products, and some isomeric components have similar physicochemical properties, making it difficult for traditional analytical methods to accurately distinguish and identify them.
● The industrial oxidation reaction experiences significant fluctuations in temperature and pressure, and the reaction state changes rapidly. Lagging detection data cannot match the requirements for real-time process control, making it difficult to precisely control reaction conversion rates and product purity.
In response to the above detection points, the detection methods that are commonly used in the industry mainly include off‑line gas chromatography, infrared gas detection, and electrochemical sensing.
Offline gas chromatography offers relatively high analytical accuracy, but it suffers from cumbersome detection procedures, long analysis cycles, and severe data lag, making real‑time process monitoring impossible. It is also susceptible to corrosion by aggressive media, which leads to depletion of chromatographic consumables. Traditional infrared detection is prone to interference from water vapor and overlapping gas peaks, with significant baseline drift and insufficient sensitivity for identifying certain non‑polar fluorinated components. Electrochemical gas sensors suffer from poor selectivity, are easily poisoned and deactivated by fluoride‑containing media, and have short service lives; they can only provide simple toxic gas alarms and are incapable of achieving simultaneous, accurate quantitative analysis of multiple components. None of these conventional detection techniques can fully meet the monitoring requirements of the entire hexafluoropropylene oxidation process.
With the continuous iteration and upgrade of spectroscopic analysis technology, online Raman spectroscopy detection has emerged as a new and efficient technology to solve the hexafluoropropylene oxidation detection challenge. Among them, JINSP's online Raman detection equipment, with its exclusive adaptive advantages, comprehensively overcomes the industry's existing detection pain points.
This equipment, based on the principle of molecular characteristic Raman scattering spectroscopy, can achieve simultaneous, real-time online monitoring of multiple components, including hexafluoropropylene, hexafluoropropylene oxide, and various fluorinated by-products. It provides data in minutes or even seconds, quickly matching dynamic process changes and providing immediate data support for on-site parameter adjustments. The equipment's overall optical path and sampling structure are made of fluoride-corrosion-resistant special materials, capable of long-term resistance to strong corrosive media such as hydrogen fluoride and carbonyl fluoride, making it suitable for the harsh conditions of the oxidation reaction. It can achieve in-situ or bypass online detection, fundamentally avoiding the risk of toxic gas leakage during sampling and significantly improving on-site operational safety. At the same time, it possesses excellent component resolution capabilities, accurately distinguishing structurally similar isomeric fluorinated products, with stable and reliable quantitative detection accuracy.
Compared to traditional detection methods, JINSP's online Raman system does not require frequent consumable replacements and repeated calibrations, resulting in lower operating costs and stronger continuous operational stability. It can comprehensively meet the full-scenario detection requirements of the hexafluoropropylene oxidation production process, including safety control, product quality control, and process optimization, providing solid technical support for the intelligent and precise production of fluorochemical oxidation processes.
Post time: Aug-26-2026