China Xuyang Group caprolactam hexamethylene diamine plant a successful start-up: bypass the "adiponitrile barrier" technology break.

1. production profile: a new path that has never been industrialized has been successfully verified for the first time.

At 6: 18 on May 4, 2026, the 50000-ton/year caprolactam hexamethylene diamine production plant in Yuncheng Park of China Xuyang Group was fully completed, with a successful start-up and qualified products. The significance of this production is not in the scale of production capacity itself, but in that it is the first time in the industrial level to verify a new production path of hexamethylene diamine-caprolactam as raw material for the direct preparation of hexamethylene diamine, fundamentally bypassing the long-term plagued China's nylon industry "adiponitrile neck" problem.

For overseas chemical practitioners, understanding the background of this technological breakthrough is a prerequisite for judging the depth of its impact on the global nylon 66 industry chain.

2. why this breakthrough is significant: the historical crack of the double barrier

hexanediamine is the irreplaceable core monomer of nylon 66 industry chain. Nylon 66, formed by polycondensation of hexamethylene diamine and adipic acid, is widely used in high-end fields such as auto parts, electronic and electrical connectors, industrial silk and military textiles with excellent heat resistance, high strength and wear resistance. With the continuous increase in the penetration rate of new energy vehicles and the expansion of demand for high-end engineering plastics, the downstream demand for hexamethylene is in a long-term growth channel, and the Chinese market is obviously dependent on imported nylon 66 high-end varieties.

However, the traditional process route has double shortcomings that are difficult to overcome. The existing mainstream process is "butadiene & rarr; Adiponitrile & rarr; Hexanediamine route: the raw material end is highly dependent on butadiene, and the cost fluctuates greatly with the naphtha cracking rate and the demand for synthetic rubber, which is naturally unstable. At the technical end, the barriers to the synthesis process of adiponitrile are extremely high. The core patents have been monopolized by overseas enterprises such as Invida and Asco. The result of the double dilemma is that the supply of raw materials for hexamethylene diamine and nylon 66 in China has been in a passive situation for a long time, and the price dominance and supply stability are subject to overseas.

Xuyang's breakthrough is a systematic solution to this double dilemma. Its independent research and development of "caprolactam direct production of hexamethylene diamine" route, completely bypassing the adiponitrile link, the establishment of a new supply channel. Caprolactam is a variety with abundant production capacity and mature technology in China. Using it as a raw material not only gets rid of dependence on butadiene prices, but also completely circumvents overseas patent barriers. this route synchronously opens up the independent controllable chain of "caprolactam & rarr; hexamethylenediamine & rarr; nylon 66", and cooperates with the nylon 6 industry, providing a realistic and feasible technical basis for chinese enterprises to build a complete matrix of "nylon 6 nylon 66 special nylon.

3. Market Impact and Strategic Judgment of Overseas Practitioners

the medium-and long-term impact on the supply pattern of hexamethylene and nylon 66 in China is the core concern. Subject to the technical monopoly of hexanedinitrile, China's hexanediamine production capacity expansion has been blocked for a long time, there are few new projects, and the gap between supply and demand is difficult to fill effectively through domestic production capacity. The success of Xuyang's industrialization verification means that a hexamethylene diamine expansion path that does not rely on overseas technology authorization is officially opened. If the subsequent full-load stable operation performance is good, the process is further optimized and the downstream customer certification is obtained, it is expected to promote the substantial improvement of China's supply capacity of hexamethylene diamine, and gradually change the long-term control of nylon 66 raw materials.

Competitive pressures on overseas suppliers will be incremental rather than abrupt. The first phase of 50000 tons/year is not enough to have an immediate impact on the market pattern, but its strategic value lies in the opening of the technical path-once the process stability is verified, the threshold for subsequent replication and expansion will be greatly reduced. The bargaining power of traditional hexanedinitrile technology monopolists such as Invida and Aotech to the Chinese market will be systematically weakened as China's local alternative path matures.

Practical advice for traders and supply chain practitioners: at present, the device is in the first successful start-up stage, full load stable operation performance and downstream customer certification import progress, is to judge whether this new technology route can achieve large-scale commercial landing key follow-up observation indicators. It is suggested to closely track the progress of capacity climbing in Xuyang Yuncheng Park, product quality announcement and the procurement dynamics of downstream nylon 66 manufacturers, which will be the most direct advance signal to study the timeline of China's import substitution speed-up.