Process for producing acrylic acid
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United States of America Patent
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Aug 14, 2012
Grant Date -
Oct 8, 2009
app pub date -
Aug 31, 2007
filing date -
Sep 15, 2006
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Abstract
The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams.
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