Maleic anhydride

Maleic anhydride plays a key role in the chemical industry due to its ability to react with olefins, vinyl, nitrogen-containing and other groups. Produced in large volumes, it is used to synthesize various polymeric materials, for example, advanced polyesters, which are used in the production of films, adhesives, coating compounds and engineering plastics.

Chemical structure and synthesis

Moleic anhydride has the molecular formula:

C4​H2​O3​,

this corresponds to the structure of cyclic anhydride obtained from maleic acid. Industrially, it is produced by the catalytic oxidation of butane or benzene in the presence of vanadium catalysts, where the selective conversion of hydrocarbons into anhydride occurs.

Physico-chemical properties

• Appearance: White crystalline or powdery product.

• Reactivity: High ability to additive and polymerization reactions due to the active double bond.

• Heat resistance: It has moderate thermal stability, but can decompose or polymerize when heated.

• Hydrolysis: Easily hydrolyzes to form maleic acid upon contact with moisture.

Application

• Resin production: The main component for the synthesis of high-quality polyester polymers used in paints and varnishes and adhesives.

• Polymerization: It is used as a monomer for the manufacture of copolymers with improved mechanical and thermal properties.

• Chemical synthesis: It is used to produce pharmaceutical, agrochemical and other specialized products due to its high reactivity.

Conclusion

Maleic anhydride is a universal chemical reagent in modern industry, contributing to the production of a wide range of polymeric materials and resins. Its high reactivity and the ability to synthesize a variety of copolymers make it a key intermediate for the creation of modern engineering and consumer materials.