Process for continuously producing an anhydrous methyl...

Details Process for continuously producing an anhydrous methyl... Process for continuously producing an anhydrous methyl...

C - Chemistry, Metallurgy

07

C

202/54, 260/495.

C07C 67/08 (2006.01) B01D 3/14 (2006.01) B01J 27/02 (2006.01) B01J 27/16 (2006.01) C07B 61/00 (2006.01) C07C 27/00 (2006.01) C07C 67/03 (2006.01) C07C 67/54 (2006.01) C07C 69/12 (2006.01) C07C 69/14 (2006.01)

Patent

CA 2012006

A process for continuously producing an anhydrous methyl acetate/methanol mixture by esterifying acetic acid and methanol in the presence of an acidic esterification catalyst is indicated, which comprises carrying out the esterification in a distillation column having n = 20 to 50 distillation trays, a) the acetic acid being fed together with the catalyst to a distillation tray which is at a distance of 0.5 n to 0.8 n from the still bottom, b) feeding 50 to 80 % by weight of the total methanol to the still bottom and the remaining methanol to a distillation tray which is 2 to 10 trays above the acetic acid feed tray, c ) feeding methanol and acetic acid into the distilla- tion column at a molar ratio of (1.5 to 3): 1, d) setting a reflux ratio of (0.75 to 1.5): 1, e) taking off the anhydrous methyl acetate/methanol mixture at the top of the column and f) a water/methanol/acetic acid bottom product with the catalyst from the still bottom.

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