The 30,000-ton/year caprolactam-to-hexamethylenediamine project by Yongrong Technology has been fully commissioned
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On May 20, with the completion of the final processing step, Yongrong Technology’s 30,000 tons per year project for producing adipic acid from caprolactam, which is part of Yongrong Holding Group, was fully operational. The plant started up successfully on its first attempt, producing high-quality adipic acid. This marks Yongrong Holding Group’s successful development of a completely new manufacturing route in the field of key raw materials for nylon 66. It is understood that hexamethylenediamine is a key intermediate in the production of nylon 66. The production process of hexamethylenediamine is undergoing changes, with breakthroughs being made in new approaches in addition to traditional techniques. The hydrogenation of adiponitrile to produce adipamide is the most widely used process globally. The cost of this route depends primarily on adiponitrile, the upstream raw material; the production technologies for this material, such as the butadiene method, have long been monopolized by foreign companies like Invista. As an emerging alternative technology, the lactam amination and dehydration method bypasses the process involving adiponitrile to directly produce adipamide from lactam. Currently, this technology is being put into large-scale use, with various projects such as those of Xuyang Group, Yongrong Holdings, and Anhui Haoyuan Chemical adopting it. On May 4, the 50,000-ton/year caprolactam-to-hexamethylenediamine plant at Xuyang Group’s Yuncheng Industrial Park was fully commissioned. The run was successful, and qualified products were produced. This process is an intellectual property asset of Xuyang Group, enabling the direct conversion of caprolactam into hexamethylenediamine. As of May 2026, China’s hexamethylenediamine industry has reached a crucial milestone: the first two projects to come online that year both utilized this innovative process of \"direct conversion of caprolactam to hexamethylenediamine\". Affected by fluctuations in the global chemical market and the pass-through of upstream costs, companies led by Invista have raised the prices of hexamethylenediamine on multiple occasions. According to Nvidia’s recent price increase notice, as of April 1, 2026, the spot price of hexamethylenediamine has been raised to 26,000 yuan per ton. Starting from May 1, 2026, it will be raised again to 27,000 yuan per ton.
China accounts for half of the total supply. By 2025, China’s capacity for adipic amine production will have reached 1.5 million tons per year, accounting for over 50% of the global total. Thanks to the advancement in domestic production of adiponitrile and the cost advantages resulting from continuous expansion of production, China has successfully broken down the scale advantages held by foreign manufacturers. In addition, BASF announced the successful commissioning of its world-class adipic acid plant in Chalampé, France, which increases its annual adipic acid production capacity to 260,000 tons. Multiple well-known chemical giants have successively announced shutdown measures, indicating an increasingly severe market environment. On December 5, 2025, the Japanese chemical giant Asahi Kasei announced a phased shutdown of its hexamethylenediamine (HMD) production, with full cessation expected by April 2027. This decision is part of its strategy to move away from low-margin products and focus on those with high added value. Since the beginning of this year, Asahi Kasei has exited businesses involving basic chemical products such as methyl methacrylate monomer and acrylic resins, and has instead invested more in high-end materials like photosensitive polyimides, with the goal of improving capital efficiency and profitability. On June 17, 2025, Osram Functional Materials announced its decision to shut down its adipic acid production plant located in Lianyungang, China, in an orderly manner. Aosund’s integrated production base for hexamethylenediamine and nylon chemicals in Lianyungang was opened in October 2024. This facility represents Ascend’s largest investment outside the United States, and its biggest investment to date. The total project cost is approximately 4.2 billion yuan; the first phase alone requires an investment of about 1.29 billion yuan. The project involves constructing a plant capable of producing 200,000 tons of adiponitrile per year. Construction began in 2022, and the project was fully completed and accepted in September 2024.
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