Patent ID: 6982026
Filing Date: 2006-01-03
Classification: B01D,C07C,Y10S

Abstract:
1. An azeotropic distillation process for the recovery of at least one of an organic acid or an organic acid amide from a feed stream comprising at least one of the organic acid or the organic acid amide, comprising the steps of: mixing at least one azeotroping agent and a feed stream that comprises at least one of an organic acid or an organic acid amide and water, wherein the organic acid is selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and tricarboxylic acids having from 2 to 8 carbon atoms, and the organic acid amide is selected from the group consisting of amides of monocarboxylic acids, dicarboxylic acids, and tricarboxylic acids having from 2 to 8 carbon atoms; and distilling the mixture comprising the at least one azeotroping agent and the feed stream by a method comprising the steps of separating the first bottoms stream into a first phase and a second phase; condensing the first vapor stream to produce a first liquid stream; distilling the first liquid stream by a method comprising the steps of