Apparatus and process for purification of aromatic carboxylic acid
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United States of America Patent
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Apr 5, 2016
Grant Date -
Oct 1, 2015
app pub date -
Oct 31, 2013
filing date -
Nov 6, 2012
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Abstract
In a reaction vessel for the purification of crude aromatic carboxylic acid, a bed of hydrogenation catalyst having a vapor space is located above the hydrogenation catalyst bed. A packed bed and a holdup section are located within the vapor space and spaced above the catalyst bed. The reaction vessel has means for introducing crude aromatic carboxylic acid and means for introducing hydrogen to the reaction vessel at respective locations such that in use the crude carboxylic acid contacts the hydrogen in the packed bed. The reaction vessel also has means for removing purified aromatic carboxylic acid.
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