Rectification and Separation
After esterification, rectification is needed to separate maleic anhydride from by-products. This process requires stable equipment and standardized operations. The separated maleic anhydride then undergoes further dehydration, decolorization, and impurity removal to enhance its purity and quality.
Waste Gas Treatment
Maleic anhydride production generates large volumes of waste gas (containing organics like benzene and carbon dioxide). Treatment must meet environmental standards: appropriate equipment and measures (e.g., absorbents, catalytic combustion, or adsorption towers) should be used to remove toxic substances, protecting the environment and personnel safety.
In summary, the technical requirements for maleic anhydride production cover raw material selection, catalyst selection, reaction condition control, esterification management, rectification/separation, and waste gas treatment. Scientific and rational control of these aspects enables efficient production while ensuring product quality and environmental safety.

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