Lanzhou Petrochemical successfully switched to using the new domestic catalyst EP533N for producing polypropylene material for automotive use in just one attempt

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On November 2, the polypropylene material for automotive use EP533N, which was successfully produced using a new domestic catalyst, has begun to reach customers. This successful shift in production has further expanded the application scope of domestic catalysts and effectively reduced production costs. 　　The polypropylene material for automotive use, EP533N, features good flowability and a balanced ratio of stiffness to toughness. It has a low odor level and low volatile compound content; its odor rating is below 3.0 on the Volkswagen PV3900 evaluation standard. It is widely used in the production of high-end automotive dashboard interior components and household appliance housings, and has received high praise from end-users, making it a benchmark product in the industry. 　　The trial use of a new domestic catalyst posed a significant challenge to the stable operation of the system. To ensure the successful transition to the new production process, Lanzhou Petrochemical organized special seminars. By taking into account the actual operation of the facilities, the company conducted systematic studies on methods for controlling key process parameters and strategies for adjusting critical indicators. It identified the key control points precisely, refined the operating procedures, carefully developed plans for testing domestically produced catalysts, and established emergency response measures. All employees were trained in these aspects, thereby providing a solid foundation for the smooth introduction of the new domestic catalysts. 　　During the trial period, the polypropylene plant strictly implemented a customized control plan tailored to each product; management and technical personnel monitored the process throughout the entire operation and provided on-site oversight. They focused on key process parameters such as the gas ratio, reaction pressure, material level, and temperature in the vapor-phase reactor R401, carrying out dynamic monitoring and precise control throughout the process. The personnel on duty carry out thorough inspections, close monitoring of the systems, and precise operations; they keep a close eye on the operating parameters of the reactor, accurately track changes in the pressure within the extruder barrel, increase the frequency of sampling and analysis during the production process, and adjust key parameters such as the amount of ethylene and hydrogen added based on the analysis results. They also strictly control the amount of catalyst used and the quality of the product, ensuring that the production process runs smoothly and under control and that the product meets all required standards. This approach has fully demonstrated the reliability and suitability of domestically produced catalysts.