US 9,809,527 B2
Process for production of acrylic acid or its derivatives from hydroxypropionic acid or its derivatives
Jane Ellen Godlewski, Loveland, OH (US); Janette Villalobos, Cincinnati, OH (US); Dimitris Ioannis Collias, Mason, OH (US); and Juan Estaban Velasquez, Cincinnati, OH (US)
Assigned to The Procter & Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Oct. 10, 2014, as Appl. No. 14/511,195.
Application 14/511,195 is a division of application No. 13/760,483, filed on Feb. 6, 2013, granted, now 8,884,050.
Claims priority of provisional application 61/623,054, filed on Apr. 11, 2012.
Prior Publication US 2015/0031913 A1, Jan. 29, 2015
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 51/377 (2006.01); C07C 51/48 (2006.01); B01J 27/18 (2006.01); B01J 27/187 (2006.01); B01J 27/25 (2006.01); C07C 51/09 (2006.01); C07C 57/04 (2006.01); A61F 13/534 (2006.01); C08F 2/10 (2006.01); B01J 27/16 (2006.01); B01J 27/185 (2006.01); B01J 27/186 (2006.01); B01J 27/188 (2006.01); B01J 27/195 (2006.01); B01J 27/198 (2006.01); B01J 35/02 (2006.01); B01J 37/00 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); C07C 51/44 (2006.01); A61F 13/53 (2006.01)
CPC C07C 51/48 (2013.01) [A61F 13/534 (2013.01); B01J 27/16 (2013.01); B01J 27/1806 (2013.01); B01J 27/186 (2013.01); B01J 27/187 (2013.01); B01J 27/188 (2013.01); B01J 27/1811 (2013.01); B01J 27/1817 (2013.01); B01J 27/1853 (2013.01); B01J 27/1856 (2013.01); B01J 27/195 (2013.01); B01J 27/198 (2013.01); B01J 27/25 (2013.01); B01J 35/023 (2013.01); B01J 37/0036 (2013.01); B01J 37/04 (2013.01); B01J 37/08 (2013.01); C07C 51/09 (2013.01); C07C 51/377 (2013.01); C07C 51/44 (2013.01); C07C 57/04 (2013.01); C08F 2/10 (2013.01); A61F 13/53 (2013.01); A61F 2013/530489 (2013.01); A61F 2013/530496 (2013.01)] 20 Claims
 
1. A process for converting lactic acid, lactic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof comprising the following steps:
a) Providing an aqueous solution comprising lactic acid, lactic acid derivatives, or mixtures thereof, wherein said lactic 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 producing said acrylic acid, acrylic acid derivatives, or mixtures thereof.