China Zhenhai base 200000 tons/year isononyl alcohol plant put into operation: the largest single plant in China was successfully started at one time.

1. production overview: high purity product verification whole process stable operation

on April 29, 2026, the 200000-ton/year isononanol plant in the second phase of China Zhenhai base successfully produced qualified products with a purity of more than 99.5, and the commissioning was successful. The device will be transferred to the commissioning stage after the mechanical completion in January 2026. During the start-up period, the key steps such as airtight purging, catalyst treatment, raw material introduction, system cycle establishment and intermediate product commissioning will be completed in turn, and finally the whole process will be smoothly connected. This is the largest production plant of isononanol in China.

The product purity index of more than 99.5 is significant-this figure directly corresponds to the strict requirements of raw material quality in high-end sensitive application scenarios such as DINCH (diisononyl cyclohexanedicarboxylic acid), which means that the device has the ability to enter the high value-added market segment from the time of production, rather than being limited to ordinary industrial-grade supply.

2. market logic: green regulation drives demand, import dependence needs to be cracked

isoyl alcohol is the core upstream raw material of the high-end environmentally friendly plasticizer track. Its main downstream is DINP (diisonyl phthalate) and DINCH two series of high-end plasticizers, widely used in automotive interiors, building materials and wires and cables and other PVC products. Compared with traditional octanol-based plasticizers, isononyl-based plasticizer products have better environmental protection and safety characteristics, and are the core direction of the green upgrade of the global plasticizer industry.

The EU REACH regulation is a structural driver of demand growth. The EU continues to tighten restrictions on the use of phthalate plasticizers, pushing global downstream manufacturers to accelerate the switch to high-carbon environmentally friendly plasticizers such as DINP and DINCH, and the demand for upstream isononyl alcohol continues to grow. Among them, DINCH as food contact, medical devices and other sensitive areas of the preferred plasticizer, market growth is significantly higher than the traditional varieties, the demand for high purity isononyl alcohol quality requirements are more stringent-the device of more than 99.5 percent of the purity index and this demand is highly consistent.

However, China's previous high-end high-carbon plasticizer alcohol (C9 alcohol) in the field of serious shortage of production capacity, isononyl alcohol long-term dependence on imports, the market supply is mainly dominated by BASF, Eastman and other multinational enterprises. China's downstream DINP and DINCH producers have limited bargaining power in raw material procurement, are greatly affected by import price fluctuations, and have a fragile supply chain structure.

Impact of 3. production: import substitution speeds up, supply chain restructuring

the landing of 200000 tons/year capacity is an important expansion node on the supply side of isonyl alcohol in China. As the largest monomer plant in China, its smooth production will effectively fill the production capacity gap of China's high-end high-carbon plasticizer alcohol, and promote the localization rate of isonyl alcohol raw materials to increase substantially. For China's downstream DINP and DINCH producers, the emergence of a stable local supply source will improve the supply chain structure, reduce dependence on a single source of imports, and enhance the bargaining power of raw material procurement.

For existing overseas suppliers such as BASF and Eastman, the price premium system for imported materials will face direct suppression. The scale of new domestic supply of 200000 tons is sufficient to have a substantial impact on the balance of supply and demand in the Chinese market, and the price window for imported isonyl alcohol will systematically narrow as the localization rate increases. Overseas suppliers need to assess the potential compression of exports to China in advance, and focus on the progress of quality certification of domestic materials in high-end DINCH application scenarios, which will be the core indicator of the speed of import substitution.

In addition, the device relies on the C4 industry chain resources of China Zhenhai Base, which helps to enhance the overall competitiveness of China's C4 industry chain and promote the evolution of the chemical product structure in the direction of greening and high-end, which is in line with the industrial policy orientation of China's "15th Five-Year Plan.

Subsequent key observation points: the device is currently in a successful start-up stage. The stability of full-load operation and the progress of batch certification and import of downstream DINP and DINCH customers are the decisive variables to judge whether domestic isononanol can substantially leverage import substitution and reshape the supply and demand pattern of high-end plasticizer alcohol in Asia, which is worthy of continuous tracking by overseas traders and supply chain practitioners.