The acrylonitrile market is entering a delicate supply contraction window. On September 1, Anqing Petrochemical began a phased shutdown of its total 210,000-ton-per-year acrylonitrile units for maintenance, with the 80,000-ton line stopping first on September 2 and the 130,000-ton line following on September 8. The entire maintenance period is expected to last about two months. This arrangement means that as the traditional 'golden September and silver October' demand season approaches, domestic acrylonitrile supply will face a temporary gap, directly supporting prices.
Background
Anqing's maintenance is not an isolated case. Every year from late Q3 to early Q4, domestic acrylonitrile units are often scheduled for concentrated maintenance to avoid the impact of severe winter cold on equipment. However, the peculiarity this year is that acrylonitrile prices have been at relatively low levels recently, squeezing industry profit margins, and some small and medium-sized units were already operating at reduced loads. In this context, the centralized maintenance by major producers acts as an active 'inventory reduction' on the supply side, amplifying its marginal impact on the market.
From a capacity structure perspective, China's total acrylonitrile capacity exceeds 3 million tons per year, and Anqing's 210,000 tons accounts for about 7%. Although the absolute proportion is not high, the two-month maintenance period means a considerable cumulative supply reduction. Based on average monthly output, Anqing alone will reduce supply by about 35,000 tons during the maintenance period, equivalent to nearly a quarter of a medium-sized downstream plant's monthly raw material consumption.
Industry Impact
For downstream acrylic fiber, ABS resin, and amide products, the transmission chain of tightened raw material supply is clear. Acrylic fiber plants typically maintain 10-20 days of safety inventory. If Anqing's maintenance leads to longer spot delivery cycles, some companies will be forced to increase stockpiling, thereby raising short-term procurement costs. Meanwhile, the ABS industry is currently operating at about 80% capacity, with stable rigid demand for acrylonitrile, making the supply gap more likely to translate into upward price pressure.
However, the sustainability of price rebound depends on whether demand can recover in tandem. If terminal textile and apparel orders fall short of expectations during 'golden September and silver October,' acrylic fiber plants may choose to cut operating rates rather than purchase raw materials at high prices, capping acrylonitrile gains. Conversely, if demand recovery aligns with supply contraction, spot prices could break through the recent trading range.
For traders, strategies during the maintenance window need to be more cautious. On one hand, they can moderately hold spot positions to benefit from price increases; on the other hand, they must be wary of the risk of price correction after units restart in Q4, as supply is released intensively. Historical data shows that within one month after maintenance ends, acrylonitrile prices typically correct by 3%-5% on average.