Synthesis process of methyl methacrylate

The esterification method for the synthesis of methyl methacrylate involves reacting methanol and acrylic acid to produce methyl methacrylate, which is then esterified with methanol to obtain methyl methacrylate. Esterification reactions are generally carried out under acidic conditions, and commonly used catalysts include sulfuric acid, phosphoric acid, etc. This method has mild reaction conditions and high yield, but requires a large amount of methanol for the reaction, which requires subsequent separation, purification, and other steps, causing certain pollution to the environment.
The oxidation method involves the oxidation reaction of acrolein to obtain methyl methacrylate. This method does not involve the use and subsequent treatment of methanol in esterification, and has a fast reaction rate and high yield. However, it requires high temperature and high pressure conditions for the reaction, which can easily produce toxic oxidation by-products during the reaction process.
In summary, selecting an appropriate synthesis method requires comprehensive consideration of multiple factors such as yield, reaction conditions, and environmental impact.
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