Patent ID: 8884050
Filing Date: 2014-11-11
Classification: A61F,B01J,C07C,C08F

Abstract:
1. A process for converting hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof comprising the following steps: a) Providing an aqueous solution comprising hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof, wherein said hydroxypropionic acid is in monomeric form in said aqueous solution; b) Combining said aqueous solution with an inert gas to form an aqueous solution/gas blend; c) Evaporating said aqueous solution/gas blend to produce a gaseous mixture; and d) Dehydrating said gaseous mixture by contacting said gaseous mixture with a dehydration catalyst under a pressure of at least about 80 psig, producing said acrylic acid, acrylic acid derivatives, or mixtures thereof.