Preparation of ultra high purity methyl acetate

Details Preparation of ultra high purity methyl acetate Preparation of ultra high purity methyl acetate

1989-05-22

1990-07-03

Bascomb, Wilbur

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560248, 203 35, 203 38, 203 51, 203 61, 203DIG6, C07C 6708, C07C 6754, B01D 340

Patent

active

049392948

ABSTRACT:
In a process for the production of methyl acetate from methanol and glacial acetic acid involving countercurrently flowing acetic acid and methanol through a single reactive distillation column having an extractive distillation section and a methyl acetate/acetic acid rectification section to obtain methyl acetate in the presence of an acidic catalyst, the improvement which comprises producing ultra high purity methyl acetate by the additional step of introducing acetic anhydride and a salt-free acid catalyst into the reactive distillation column between the extractive distillation section and the methyl acetate/acetic acid rectification section.

REFERENCES:
patent: 2155625 (1939-04-01), von Retze
patent: 3927077 (1975-12-01), Finkbeiner et al.
patent: 4304925 (1981-12-01), Watanabe et al.
patent: 4435595 (1984-03-01), Agreda et al.
patent: 4497967 (1985-02-01), Wan
patent: 4526725 (1985-07-01), Deardorff
patent: 4597834 (1986-07-01), Berg et al.

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