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Progress of the technical upgrade project for Zhejiang Baling Hengyi. Author/Source: China National Chemical Corporation Ninth Company. Date: 2022-04-08. Clicks: 11. On April 6, the steel structure of the raw coal storage and transportation facility for the Baling Hengyi technical upgrade project began to be lifted into place. This lifting operation involves the first section of Pier 1#; the weight to be lifted is 58 tons, the installation height is 9 meters, and the span is 27 meters. Two truck cranes are used for the lifting task. The design for the storage and transportation of raw coal includes 7 trestles, 14 truss sections, and 10 steel column frames; the total installation weight is approximately 1,500 tons. These elements are connected to the truck-based coal unloading area, 2 coal storage silos, 3 transfer stations, and 1 crushing building, and ultimately lead up to the gasification framework at a height of 56 meters. The on-site construction area is limited, and it passes through multiple hazardous chemical plants, resulting in challenges such as difficult coordination and a tight schedule. Project Overview: The expansion project for Zhejiang Baling Hengyi’s 400,000 tons per year caprolactam production capacity is located in the Linjiang Industrial Park, Xiaoshan District, Hangzhou City, Zhejiang Province. Building on the existing 400,000 tons per year caprolactam production facility, this project aims to install a new hydrogen production unit using advanced coal chemical technology, with an output of 50,000 Nm3/h; simultaneously, it will include a 300,000 tons per year ammonia production unit as well as a supporting air separation unit with an output of 60,000 Nm3/h. Total investment: 2,478.85 million yuan. The project is constructed in two phases. In the first phase, the existing benzene hydrogenation process using the cyclohexane method, the ammonia oximation process, two-stage rearrangement, and multi-stage purification processes are utilized. By adding some key production equipment to the existing facilities for oximes, caprolactam, coal-based hydrogen, etc., the technical upgrades necessary to increase the capacity to 300,000 tons per year of caprolactam are carried out ； The second phase of the project utilizes a new benzene hydrogenation process based on cyclohexene, as well as Sinopec’s latest gas-phase rearrangement technology. New production lines for cyclohexene-based processes, ammonia oximation processes, and gas-phase rearrangement for caprolactam are established, along with additional auxiliary facilities to support these operations, thereby enabling an expansion of caprolactam production capacity to 400,000 tons per year.