Purification of methyl acetate
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To refine a 92.5% methyl acetate aqueous solution to a methyl acetate content of 99.5%, should an azeotropic distillation or extractive distillation be used for this distillation process? What type of process route should be adopted? I would appreciate it if experts could provide relevant information or literature.
English name methyl acetate； Methyl acetate Alternative name: Methyl acetate Molecular formula: C3H6O2 ； CH3COOCH3: Appearance and properties – Colorless transparent liquid with a pleasant fragrance. Molecular weight: 74.08. Vapor pressure: 13.33 kPa at 9.4°C. Flash point: -10°C. Melting point: -98.7°C. Boiling point: 57.8°C. Solubility: Slightly soluble in water; miscible with ethanol, ether, and most other organic solvents. Density: Relative density (water=1): 0.92 ； Relative density (air=1): 2.55. I think if normal distillation isn’t feasible, then extractive distillation will be necessary.
I have carried out the separation of acetic acid, methyl acetate, methanol, and propanol. The thermal decomposition of methyl acetate is quite intense
13.33 kPa/9.4℃ – By looking at these values, it’s clear that this substance is thermosensitive; vacuum distillation should be used at the very least. As for what kind of extractant to use, I’m not sure
Methyl acetate and water may form an azeotropic system