Process for recovery of a carboxylic acid from a feed stream containing the corresponding ester
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United States of America Patent
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Nov 24, 2015
Grant Date -
Dec 25, 2014
app pub date -
Jun 20, 2013
filing date -
Aug 13, 2008
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Abstract
A carboxylic acid e.g. acetic acid, is recovered from an aqueous feed stream containing the corresponding ester, an alcohol and a small amount of water by catalytically dehydrating the alcohol to the corresponding ether and water, and reacting the water with the ester to generate a liquid carboxylic acid rich product stream. The acid is recovered by distillation. In a second embodiment, additional alcohol and/or water are co-fed with the feed or fed directly to a catalytic distillation column, resulting in a liquid bottom product stream of substantially pure acetic acid and a top distillate stream of substantially pure ether.
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