The 90% model review for the hydrogen production upgrade and by-product ammonia air separation unit at Zhejiang Baling Hengyi L-caproamide plant has been completed.

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The hydrogen production upgrade and by-product ammonia production improvement project of Zhejiang Baling Hengyi Caprolactam Co., Ltd. aims to build a new caprolactam production facility with an annual capacity of 500,000 tons, based on the existing plant already in operation. This new facility will utilize advanced coal chemical technologies to produce hydrogen at a rate of 50,000 Nm3/h; simultaneously, it will also generate 300,000 tons of synthetic ammonia per year, along with a corresponding air separation unit capable of producing 60,000 Nm3/h of oxygen. The total investment for the project is 2,478.85 million yuan, with construction carried out in two phases. The first phase utilizes the existing cyclohexane-based benzene hydrogenation process, ammonia oximation process, two-stage rearrangement process, and multi-stage purification process. By adding certain key production equipment to the existing facilities for oximes, caprolactam, coal-derived hydrogen, etc., the technical upgrades are implemented to increase the capacity to 300,000 tons per year of caprolactam ； 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. Recently, the 90% scale model review meeting for the air separation unit of the hydrogen production upgrade and by-product ammonia improvement project undertaken by Tianchen Company for Zhejiang Baling Hengyi Caprolactam Co., Ltd. was held at its Heilongjiang branch. This review meeting was led by the Process and Piping teams of Tianchen Heilongjiang Branch, with support from various other teams. The review will cover aspects such as process requirements, 3D model piping, equipment layout, on-site installation, operation and inspection, as well as the convenience of operation and maintenance. Through in-depth discussions and exchanges, all parties involved have put forward optimization suggestions while ensuring compliance with design specifications.