Chengda Engineering wins the EPC contract for Yan’an Energy Chemical’s 25,000 tons/year second-generation EPDM production facility

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Recently, according to the relevant announcements on the Yanchang Petroleum Procurement Website, Shaanxi Yanchang Petroleum Yan’an Energy and Chemical Co., Ltd. won the EPC general contracting contract for the second production line of ethylene-propylene rubber with an annual capacity of 25,000 tons, as part of the next phase of its \"Sancarbon Sancai\" specialized and high-quality development project. The 25,000 tons per year EPDM production facility (the first production line) for the \"Sancarbon Sanmaterial\" specialized and high-quality project of Shaanxi Yanchang Petroleum Yan’an Energy Chemical Co., Ltd. was completed and put into operation in 2019. The project under this tender is aimed at completing the second production line; the raw material and product storage units, the catalyst preparation unit, as well as the substation and cabinet rooms are shared with the first production line ； Other units, including the polymerization unit, the water washing unit for catalyst removal, the coalescence stripping unit for solvent removal, the post-treatment unit, and the units for solvent and diene recovery and purification, need to be constructed; the land required for these facilities has already been reserved during the construction of the first production line. According to the tender announcement, the scope of this tender includes the following: the construction of a second production line for EPDM with an annual capacity of 25,000 tons, along with associated facilities, which mainly comprise a polymerization unit, a degassing unit for the polymerized slurry, a washing unit for the polymerized slurry, a stripping unit for the polymerized slurry, and a post-treatment unit ； Construct a new secondary unit for solvent diene recovery and purification; build new RTO facilities for waste gas treatment, and upgrade supporting facilities such as the substation and cabinet rooms ； Integrate the technical improvement projects related to the primary units into the implementation of the secondary units ； The utilities such as water, electricity, and steam required by the project are provided by the existing supporting facilities of the installation ； Including specialties such as civil engineering, equipment, process engineering, electrical engineering, and instrumentation. Regarding Yan’an Energy Chemical: Shaanxi Yanchang Petroleum Yan’an Energy Chemical Co., Ltd. is located in the Fuxian Industrial Park in Yan’an City, Shaanxi Province. It was established in September 2009, with a registered capital of 6.5 billion yuan; it is a wholly-owned subsidiary of the Yanchang Petroleum Group Company. The Yan’an Coal, Oil, and Gas Resources Comprehensive Utilization Project, which is built and operated by Yan’an Energy Chemical, employs 12 advanced domestic and international processing technologies. Using 1.057 billion cubic meters of natural gas, 920,000 tons of raw coal, and 400,000 tons of naphtha per year as raw materials, it integrates petrochemical, natural gas chemical, and coal chemical processes in a seamless manner. This approach effectively addresses the issue of high carbon content and low hydrogen content in coal chemical processes, as well as the high hydrogen content and low carbon content in natural gas chemical processes. Compared to coal-to-methanol production on a similar scale, this project achieves a 26% higher utilization rate of carbon resources, resulting in a reduction of 3.7 million tons of carbon dioxide emissions per year. When compared to coal-to-olefins production on a similar scale, it boasts a 21% higher energy conversion efficiency, thereby enabling complementary use of carbon and hydrogen and facilitating efficient transformation and comprehensive utilization of resources. Construction of this project began in September 2015; the main production process was operational by September 2018, the entire production process was up and running by April 2019, and commercial operation commenced in July 2020. It features 8 main production units, including ones for manufacturing 1.8 million tons per year of methanol, 600,000 tons per year of methanol derivatives, 400,000 tons per year of light oil products, 420,000 tons per year of polyethylene, 300,000 tons per year of polypropylene, 200,000 tons per year of butanol, 80,000 tons per year of 2-PH (dipropylheptyl alcohol), and 25,000 tons per year of EPDM rubber, along with supporting utility systems. Among them, the light oil processing unit is the first of its kind in China; the butanol/2-PH co-production unit is the world’s first of its kind; and the EPDM rubber production unit is the world’s first to utilize the solution polymerization process technology developed by the Italian company FasTech throughout the entire production process. It mainly produces high-value chemical products such as polyethylene, polypropylene, butanol, 2-PH, and EPDM.