Maleic Anhydride Manufacturing Plant Project Report 2026: Cost Analysis, ROI, and Feasibility Insights

Maleic Anhydride is primarily manufactured through the partial oxidation of n-butane with air or oxygen over a vanadium-phosphorus-oxide (VPO) catalyst. The process is commonly carried out in fixed-bed tubular reactors, while fluidized-bed reactor technology is also used for n-butane oxidation. The reaction is highly exothermic and is followed by cooling, absorption or condensation, recovery, and purification to obtain Maleic Anhydride. An alternative, older production route uses benzene oxidation in a fixed-bed reactor with vanadium- and molybdenum-based oxide catalysts, followed by recovery and purification of the product. N-butane is now the dominant feedstock and accounts for more than 80% of global production, while benzene-based production represents the remaining share.

The key feedstocks required for Maleic Anhydride production are n-butane and benzene, depending on the manufacturing route, with n-butane being the predominant feedstock used in modern plants. Raw materials, particularly n-butane or benzene, account for approximately 58% to 68% of total operating expenses. N-butane is generally preferred because of its availability and comparatively favourable economics, while benzene remains relevant in plants using established benzene-based technology.

The manufacturing cost of Maleic Anhydride is primarily driven by raw material expenses, with n-butane or benzene accounting for approximately 58% to 68% of total operating expenses. Feedstock prices are influenced by crude oil and natural gas market conditions, availability, transportation, and supply-demand fluctuations. Other major cost factors include utilities, which typically contribute around 8% to 12% of operating expenses, catalyst consumption, energy requirements for oxidation and recovery, labour, equipment maintenance, product purification, waste treatment, and environmental and safety compliance.

Maleic Anhydride manufacturing requires compliance with regulations covering hazardous chemical handling, occupational exposure, air emissions, wastewater, waste disposal, fire and process safety, and transportation and storage of hazardous materials. Facilities using benzene must implement stringent controls for benzene emissions and worker exposure because benzene is a hazardous air pollutant and a known carcinogen. Maleic Anhydride itself requires controlled handling because it is corrosive, irritating, reactive, and combustible, with an OSHA 8-hour exposure limit of 0.25 ppm (1 mg/m³). Sustainability measures include improving energy efficiency, controlling process and fugitive emissions, recovering process materials, reducing waste and wastewater generation, and increasing the use of n-butane-based technology and other lower-impact production approaches.