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Maleic Anhydride is a highly reactive, multifunctional chemical intermediate with profound significance in organic synthesis and industrial chemistry. Characterized by its acid anhydride functionality and an active carbon-carbon double bond, this white crystalline solid (or molten liquid during handling) is a foundational monomer for the production of Unsaturated Polyester Resins (UPR), alkyd resins, 1,4-butanediol (BDO), tetrahydrofuran (THF), and gamma-butyrolactone (GBL). The structural rigidity, thermal stability, and mechanical strength inherent to MA-derived polymers make them indispensable in automotive composites, marine hulls, building facades, and industrial coatings.
Historically, the chemical industry relied heavily on the liquid-phase benzene oxidation pathway to synthesize Maleic Anhydride. However, in response to modern environmental regulations, shifting global carbon policies, and the volatility of benzene feedstock prices, the global industry has systematically shifted toward the gas-phase catalytic oxidation of n-butane. This catalytic process, carried out in either fluid bed or fixed bed reactors using highly optimized Vanadyl Pyrophosphate (VPO) catalysts, yields higher atomic efficiency, reduces hazardous emission profiles, and aligns directly with European and American environmental mandates. For strategic procurement divisions, sourcing CE-certified, butane-derived Maleic Anhydride at competitive pricing is no longer merely a cost-reduction strategy—it is a critical supply-security priority.
For industrial procurement in the European Economic Area (EEA) and other strictly regulated international markets, compliance with CE standards, REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals), and regional safety frameworks is mandatory. Sourcing from manufacturers that offer CE Certification ensures that the product is manufactured under verified quality control processes, safeguarding downstream users against toxic impurities, heavy metal residues, and batch inconsistency.
CE compliance verifies that parameters such as purity (minimum 99.5%), color (typically measured in Hazen units, ensuring ≤ 20 AP-HA color metrics), crystallization point (minimum 52.5°C), and free maleic acid content (maximum 0.1% to 0.2%) conform strictly to unified product safety standards. Compliance ensures that polymerization rates remain predictable in UPR processing, prevents gel-time drift during resin cooking, and eliminates premature catalyst poisoning in secondary hydrogenation cycles. Shandong Pulisi Chemical Co., Ltd. maintains a robust quality management framework certified to ISO 9001:2015 and German BV standards, verifying that every shipment of Maleic Anhydride is traceably engineered to meet these precise specifications.
Established in 2006, Shandong Pulisi Chemical Co., Ltd. (Stock Code: 307785) has evolved from a regional chemical supplier into a premier, globally integrated manufacturer of petrochemicals, mining chemicals, feed chemicals, and pharmaceutical intermediates. The company’s trajectory is defined by a commitment to quality control, advanced catalytic processes, and high-efficiency distribution logistics. Over the last two decades, we have established stable partnerships with Fortune Global 500 corporations, including China National Petroleum Corporation (CNPC) and Saint-Gobain.
Our core operating philosophy is centered around: "Customer First, Rapid Response; Striving as the Foundation, Efficient Collaboration; Integrity and Uprightness, Agile Adaptation." Through structured supply networks, advanced VPO catalytic systems, and rigorous compliance checks, we enable downstream chemical compounders to optimize their manufacturing lifecycles with minimal logistics friction.
The pricing of Maleic Anhydride is driven by a complex interrelation of raw material feedstocks, manufacturing scale, transport regulations, and regional trade tariffs. Because butane is direct-sourced from petroleum refining or natural gas processing, international fluctuations in crude oil and natural gas prices impact the base cost of n-butane. Manufacturers in China benefit from localized refining networks and highly scale-optimized plants, enabling a competitive baseline cost configuration.
When analyzing a Maleic Anhydride pricelist, professional buyers must evaluate:
Maintaining price competitiveness requires an optimized warehousing infrastructure. Shandong Pulisi Chemical Co., Ltd. has established warehousing and distribution complexes at major maritime ports and border gateways:
Demonstrating chemical adaptability across diversely engineered global markets and performance-driven applications.
Rigorous manufacturing standards verified through leading international inspection bodies and quality systems.
The production of Maleic Anhydride via n-butane oxidation is governed by the following chemical equation:
CH₃-CH₂-CH₂-CH₃ + 3.5 O₂ → C₄H₂O₃ (Maleic Anhydride) + 4 H₂O + Heat (ΔH ≈ -1260 kJ/mol)
This highly exothermic gas-phase catalytic reaction requires robust thermal management to prevent thermal runaways within the catalyst bed. Modern manufacturing units utilize multi-tubular fixed bed reactors equipped with molten salt coolant systems circulating around the reactor shell. The catalyst bed typically features a structured layout of Vanadyl Pyrophosphate (VPO) catalyst pellets, where the ratio of active vanadium valency states ($V^{4+}$ and $V^{5+}$) is maintained through continuous process control.
For optimal conversion efficiency and selectivity, air feed ratios and butane gas concentrations are maintained within narrow operating limits. In standard fluid-bed systems, abrasion-resistant catalysts endure mechanical fluidization, allowing continuous regenerator-reactor cycles that limit catalyst deactivation. For the end-buyer, this chemical process control ensures a low-impurity profile, reducing the presence of trace compounds such as acrylic acid or heavy metal residue that can interfere with polymerization in sensitive polymer applications.
As the global chemical industry moves toward carbon neutrality, the technical roadmap for Maleic Anhydride production is evolving rapidly. Key developments include:
Global export networks extending to over 100 countries and regions with streamlined maritime and overland freight structures.
Over 20 years of chemical manufacturing and export history, servicing more than 1,000 corporate clients globally.
ISO 9001, German BV, SGS, Halal, Kosher, and K-REACH certifications, verifying batch-to-batch chemical reliability.
Optimized manufacturing chains and catalyst efficiency enable competitive, customized FOB, CIF, or DDP pricing configurations.
Large-scale dedicated warehouses situated near Qingdao and Tianjin ports facilitate quick container turnaround and dispatch.
Highly responsive sales and chemical application engineers providing comprehensive technical support and customized packaging configurations.
Engaging partners globally to build collaborative networks and drive chemical engineering innovation.
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