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The maintenance and defect correction work for the first-phase expansion project of Shaanxi Yanchang China Coal Yulin Energy Chemical Co., Ltd. (Yanchang Jingbian Phase II project) was successfully completed. Author/Source: Huahua Net Coal Chemicals; Date: 2021-06-04; Clicks: 10. On June 2, after nearly 20 days of continuous efforts, the maintenance and defect correction work for this project was finished successfully. The samples of ethylene and propylene produced by Line 2 of the DMTO unit and sent to the intermediate tank area passed the quality tests. Thus, the unit was able to start operating successfully after the repairs, producing qualified products, which laid a solid foundation for its future operation. It is reported that this maintenance and defect correction effort is one of the key annual tasks for Yueneng Chemical Company in 2021, and it represents a crucial factor in ensuring that the project can operate at full capacity and meet required standards, as well as in enabling its smooth transition to commercial operation. To ensure the high-quality and efficient completion of all tasks related to maintenance and defect correction, the company has been actively preparing for these activities since the trial operation began. It carefully analyzed the problems that arose during the trial production phase, formulated scientific plans for maintenance and defect correction, coordinated the allocation of various resources, and continuously improved the maintenance strategies. As a result, 5 main priorities and 1,016 specific maintenance tasks were identified, laying a solid foundation for high-quality maintenance work. On December 31, 2020, the completion and supplementation project for the comprehensive utilization of coal, oil, and gas resources at the Jingbian site of Yanchang Petroleum, which involved a total investment of 14.414 billion yuan and was built in just 23 months, completed its first successful trial run across the entire process. Yulin Energy Chemical’s total polyolefin production capacity is close to 2 million tons, making it the largest producer of polyolefins in Shaanxi. As a key project during Shaanxi Province’s 13th Five-Year Plan period, the Yueneng Chemical Improvement Project makes full use of the advantages in comprehensive resource utilization associated with the first phase of the Yueneng Chemical project, as well as the potential of the existing utility facilities. By optimizing the plant’s infrastructure and diversifying its product portfolio, it aims to increase production capacity and strengthen the polyolefin industry. The project involves the construction of a 1.8 million tons per year methanol complex, a 600,000 tons per year methanol-to-olefins plant, a 300,000 tons per year low-density polyethylene/ethylene-vinyl acetate copolymer (LDPE/EVA) integrated plant, a 400,000 tons per year polypropylene (PP) plant, along with the necessary utility and auxiliary facilities.