Hydrolysis of ethylene glycol acetates

Details Hydrolysis of ethylene glycol acetates Hydrolysis of ethylene glycol acetates

1977-04-26

1978-05-23

Evans, Joseph E.

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

Organic compounds

Oxygen containing

260540, 260541, 260542, C07C 2900, C07C 2702, C07C 5308, C07C 5322

Patent

active

040910393

ABSTRACT:
In the preparation of an alkylene glycol such as ethylene glycol by hydrolysis of the corresponding aliphatic acid ester, the improvement which comprises hydrolyzing the ester in a distillation column, taking to a condenser as overhead a vaporous mixture of water and aliphatic acid from the hydrolysis column, which immiscible stream is mixed with vapors of a water immiscible aliphatic ketone in the condenser, condensing the mixture and conducting the condensate to a settling tank where an upper ketone phase containing extracted aliphatic acid and a lower aqueous phase is formed, recycling the aqueous phase to the hydrolysis column, feeding the ketone phase to a distillation column where the ketone is distilled off and returned to the condenser, and separating essentially anhydrous aliphatic acid from the bottom of the distillation column.

REFERENCES:
patent: 1839932 (1932-01-01), Ricard et al.
patent: 2033978 (1936-03-01), Dreyfus
patent: 2859154 (1958-11-01), Othmer
patent: 2878283 (1959-03-01), Othmer
patent: 3647892 (1969-04-01), Hoch
patent: 3859368 (1975-01-01), Kollar

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