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Zhejiang Baling Hengyi’s hydrogen production upgrade and ammonia synthesis project: general contractor for civil works awarded Author/Source: Huahua Net Coal Chemicals Date: 2021-05-12 Clicks: 15 Recently, China National Chemical Corporation Ninth Company was awarded the contract for the general construction of the civil works related to Zhejiang Baling Hengyi Caprolactam Co., Ltd.’s hydrogen production upgrade and by-product ammonia production improvement project (the coal storage and transportation section). This project is a renovation and expansion project. It is located in the Linjiang Industrial Park, Xiaoshan District, Hangzhou City, Zhejiang Province. The construction scope includes civil engineering works such as silos (2), an automobile coal unloading yard, transfer stations No. 1–3, a crushing building, and piers No. 1–7. 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 facility 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 benzene hydrogenation process using the cyclohexane method, a two-stage rearrangement process along with an ammonia oximation process, as well as multi-stage purification techniques. By adding certain key production equipment to the existing facilities for **oxime caprolactam and hydrogen produced from coal, the capacity of caprolactam production is increased by 300,000 tons per year through technical upgrades. The second phase employs a new benzene hydrogenation process based on cyclohexene, along with Sinopec’s latest gas-phase rearrangement technology. New production lines for **using the cyclohexene method, lines for ammonia oximation to produce **oximes, and lines for producing caprolactam via gas-phase rearrangement are established, along with additional auxiliary facilities, thereby increasing the caprolactam production capacity by 400,000 tons per year.