Sinopec has applied for a patent titled “A Method for Rapid Determination of the Ethylene/Butylene Content in Terpolymerized Polypropylene”

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According to news from August 7, 2025, **information from the Intellectual Property Office shows that Sinopec Corporation has filed a patent application titled “A method for rapidly determining the ethylene/butylene content in terpolymerized polypropylene,” with the publication number CN120427559A; the application was submitted in February 2024. The patent abstract indicates that this invention discloses a method for rapidly determining the ethylene/butylene content in terpolymerized polypropylene, and it relates to the field of detection. The methods include (1) using polypropylene mixtures with known ethylene and/or butylene contents as standard samples, detecting the characteristic data of these standard samples using an infrared spectroscopy instrument, and establishing a curve based on the linear relationship between the actual contents and the characteristic data ； (2) The sample to be tested is made into film sheets with a thickness of 450μm–550μm; an infrared spectroscopy instrument is used to obtain characteristic data, and the content of ethylene or butylene is determined by analyzing the curves. By utilizing the linear relationship between quantitative data and the characteristic data obtained from infrared spectroscopy, this method yields test results that are highly consistent with the actual values, offering high accuracy. It is a safe and environmentally friendly testing approach that can be used to guide real-time adjustments to industrial production parameters, thereby further improving the methods and standards for monitoring product performance during production.