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On August 18, Yangzi Petrochemical’s EVA plant produced a new product for the first time, successfully manufacturing UE 2825DV, a photovoltaic film material with a vinyl acetate (VA) content of 28%. The technical specifications of this product met the required standards. Once it is launched on the market, it will help alleviate the shortage of photovoltaic film materials resulting from the rapid development of China’s photovoltaic industry, replace some imported products, and further enhance the competitiveness of China’s photovoltaic industry. Sinopec Yangzi Petrochemical’s 100,000 tons per year EVA plant is the first production facility in Sinopec to utilize LyondellBasell’s batch process technology. Due to the unique characteristics of this process, it is capable of producing special-purpose polymers with a high vinyl acetate (VA) content, such as photovoltaic films and hot melt adhesives, thereby meeting the demand for high-end products in the market, facilitating the upgrading of downstream products, and reducing reliance on imports. Yanzhi Petrochemical’s EVA plant operates under high-temperature and high-pressure conditions; it features many imported pieces of equipment, complex interlock logic, and high requirements for process control. During the process of switching to a new product, even the slightest carelessness can lead to significant fluctuations in reaction temperature, causing the ethylene to decompose. To ensure the success of this first switch to a new product, Yanzhi Petrochemical’s team of experts repeatedly optimized the production plan, developing hundreds of detailed production steps and emergency measures. There were 118 items to be verified regarding the trial production conditions for various systems. The plant also took proactive steps to address any issues or potential problems that arose since its commissioning, and all process instructions were followed strictly in accordance with the trial production plan. By carefully controlling the amount of additives and initiators used, it was possible to ensure the smooth progress of the trial production process. Following the 200,000-ton per year EVA production project at Yangzi BASF Lyondell Basel’s batch process facility, Yangzi Petrochemical has launched another EVA plant with a capacity of 100,000 tons per year, in order to meet the growing market demand for EVA resin in applications such as high-end cables and coating materials. At the end of 2005, the EVA production plant of Yangzi-BASF Co., Ltd., a joint venture between Yangzi Petrochemical and BASF, with an EVA production capacity of 200,000 tons per year, came online. This plant utilized Basell’s high-pressure tubular process technology. The device’s unique cold flow design improves the reaction conversion rate, enabling it to produce EVA resins with a VA content ranging from 4% to 28%. The EVA resins produced by Yangba Company are mainly used in film materials, foam materials, and cable materials. The main product grades include V5110J, V4110J, V4110F, V5110K, V6110M, V7470M, etc. Among them, cable materials account for about 85% of the Chinese market and are part of Yangba Company’s specialty EVA product line. On March 3, 2021, the EVA plant of Yangzi Petrochemical began operations, completing the entire production process; it took another little over two months before qualified EVA products were successfully produced on May 6. This facility uses the LyondellBasell batch process, and it is Sinopec’s first production plant with an annual capacity of 100,000 tons. Yangzi Petrochemical attaches great importance to the effect of product upgrading brought about by the construction of the EVA plant; it optimizes resource allocation to facilitate simultaneous improvements in both plant construction and production management capabilities. The successful commissioning of the EVA plant will make a significant contribution to Sinopec’s efforts to establish an industrial structure featuring \"one foundation, two wings, and three innovations,\" as well as to accelerating its development into a world-leading company in the field of clean energy chemicals. February 26, 2021: The unit completed full-system purging and airtightness testing. March 3, 2021: The plant was successfully commissioned, enabling the entire production process to operate smoothly and yielding qualified LDPE products. May 6, 2021: Qualified EVA products were successfully produced; the facility is now operating stably, and the predetermined goals have been achieved. The EVA plant at Yangzi Petrochemical uses the batch process technology of LyondellBasell, with a design capacity of 100,000 tons per year. The process characteristics of this unit include high operating pressure, numerous interlocks, and high operational complexity. It is Yangzi Petrochemical’s first ultra-high-pressure unit; there are very few units of this type worldwide, leaving little experience available for reference. Ultra-high pressure systems impose extremely high requirements on procedures such as equipment installation, purging, and airtightness testing; as a result, construction is challenging and demands high technical skills from engineers and operators.