The n-Butane Takeover: How Technology Iteration Is Reshaping China’s Maleic Anhydride Supply Landscape
BEIJING / SHANDONG, October 16, 2026 – China’s maleic anhydride (MA) industry has completed one of the most decisive technology transitions in the global chemicals sector. The n-butane oxidation route now accounts for more than 90 percent of the country’s MA capacity, while legacy benzene-based technology has been compressed to roughly 280,000 tonnes per year — a residual capacity that has largely lost its market influence amid prolonged losses. What was once a gradual shift has become a structural reset, and with capacity concentration continuing to rise, the competitive dynamics of the world’s largest MA market are being redrawn.
A Two-Decade Transition Reaches Its Endgame
The shift from benzene-based to n-butane-based production began in earnest during the industry’s environmental restructuring more than a decade ago. Driven by feedstock economics and tightening environmental standards, the share of n-butane oxidation in China’s MA capacity climbed from below 30 percent in 2014 to more than 92 percent by 2024, and every new project announced since 2025 has adopted the n-butane route. Today, the technology choice is no longer a competitive differentiator — it is the industry baseline.
The advantages are structural. The n-butane route offers higher feedstock conversion, lower energy intensity and a cleaner environmental profile, which together support better cost positioning and lower compliance burdens. As a result, plants built on older benzene technology — long squeezed by feedstock premiums and environmental constraints — have been systematically pushed out of the market.
Competition Shifts from Process Choice to Operating Excellence
With process routes now converging, the locus of competition has moved downstream into operations. Producers are differentiating on n-butane consumption per tonne of product, catalyst life and steam recovery efficiency — the operating metrics that determine cost and environmental performance. The best-run plants in the industry have posted capacity utilization above 106 percent, supported by in-house catalyst production and precise process control, while less competitive assets have faced extended shutdowns.
This operating gap is accelerating industry consolidation. The concentration ratio of China’s top five MA producers (CR5) is projected to reach 68 percent in 2026, up roughly three percentage points from the prior year, as leading producers extend their integration from feedstock through downstream derivatives. Regional clusters are also stabilizing, with East China accounting for about 42 percent of national output, followed by North China and South China — a geography that reflects feedstock access, downstream proximity and environmental policy alignment.
Market Discipline in an Expanding Market
Despite the technology reset, the supply-demand balance remains under pressure. Industry estimates point to China’s MA capacity reaching about 4.5 million tonnes in 2026, with output near 3.8 million tonnes and a projected annual surplus in the region of 260,000 tonnes. Producers have responded with disciplined operating behavior — protective load reductions and scheduled maintenance — rather than aggressive full-capacity running, in an effort to keep the market balance at moderate levels.
New capacity still in the pipeline, roughly 1.5 million tonnes announced over the next five years, is concentrated in large-scale integrated projects backed by major refining groups, typically pairing upstream n-butane supply with downstream BDO and biodegradable polymer production. This integration model — the “C4–MA–downstream” architecture — extends the value chain at every step and further rewards operators with scale, technology and capital depth.
Dayou’s Position in the New Landscape
Binzhou Dayou New Energy Development Co., Ltd. is a representative beneficiary of this technology-led consolidation. The company operates a 60,000-tonne-per-year MA plant on the n-butane oxidation route, supported by 40 proprietary technologies and a production system that integrates gas separation, MTBE, liquefied-gas oligomerization, sulfuric acid recovery, n-butane isomerization and MA synthesis on one site.
Dayou’s integrated configuration delivers the feedstock flexibility, process stability and environmental performance that the new competitive era demands. With ISO, SGS and FAMI-QS certifications and exports to more than 30 countries and regions, the company combines domestic operating excellence with the global quality credentials that increasingly decide access to premium markets.
As China’s MA industry settles into its n-butane era, the competitive bar has moved from choosing the right process to running it better than anyone else. For Dayou, the integration of technology, certification and global reach is the foundation of its position in this more disciplined, more concentrated market.