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The production method of Vinyl Acetate


1. Acetylene method Using zinc acetate supported on activated carbon as a catalyst, acetylene and acetic acid are reacted under normal pressure and 170-230 ℃. The reaction product is subjected to powder separation, gas separation, aldehyde removal, crude distillation and rectification to obtain refined vinyl acetate.

2. Ethylene gas phase method Ethylene, oxygen and acetic acid are reacted in gas phase under the condition of palladium-gold (or platinum) catalyst at 160180℃ and pressure <1MPa to generate vinyl acetate, and then separated and rectified to obtain fine products.

3. Ethylene liquid phase method Ethylene and acetic acid are reacted with palladium chloride-copper chloride as a catalyst to obtain vinyl acetate.

4. Acetaldehyde acetic anhydride method Using acetaldehyde acetic anhydride as raw material, firstly synthesizing ethylene diacetic acid, and then through deacetic acid reaction, it is synthesized by one-step method or two-step method.