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At 23:55 on January 13, good news came from Yantai, Shandong: Wanhua Chemical’s first LDPE plant with an annual production capacity of 250,000 tons successfully completed the entire production process and produced qualified products, marking a successful commissioning of the project from the first attempt. Wanhua Chemical’s LDPE plant utilizes LyondellBasell’s LUPOTECH TS tubular reactor technology to produce 250,000 tons per year of low-density polyethylene (LDPE) homopolymer resin. The operation range is 95%–105%, and there are 17 different product grades. These products are mainly used in injection-molded items, medical devices, pharmaceutical and food packaging, agricultural films, and cable materials. The LDPE tubular reactor technology uses ethylene as the raw material, propylene and propanal as melt index regulators, and peroxides as initiators. It features single-point feeding of ethylene and four-point injection of the initiator into a pulse reactor. The reaction pressure is extremely high (265 MPa–285 MPa), and the reaction temperature is high (260–310°C). This technology is characterized by the use of numerous imported devices, a complex process flow, a high degree of automation, a compact layout, and significant difficulties in coordinating construction activities. Construction of this facility officially began on August 22, 2022 ； On November 29, 2024, it was completed to high standards by CCCC ； On January 6, 2025, the unit completed system replacement, ethylene interconnection, and airtightness testing ； ------------------------------------------------------------------------ At 22:18 on January 13, 2025, the initiator was added to initiate the reaction, and at 22:55, qualified low-density polyethylene pellets were successfully produced.