How does the Maleic Anhydride Benzene method operate?

Maleic Anhydride Benzene method
Maleic Anhydride C4 fraction method.This method uses effective components (such as butene, butadiene) in C4 fractions as raw materials, which react with air (or oxygen) in a gas-phase oxidation reaction under the action of a V₂O₅-P₂O₅ catalyst to produce maleic anhydride. Due to high raw material costs and low yields, this method has been eliminated.
Maleic Anhydride Phthalic anhydride by-product methodDuring the production of phthalic anhydride from o-xylene, a certain amount of maleic anhydride can be obtained as a by-product, accounting for about 5% of the phthalic anhydride output.

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