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US 9,809,527 B2Granted
Process for production of acrylic acid or its derivatives from hydroxypropionic acid or its derivatives
AssigneeThe Procter & Gamble Company
InventorsJane Ellen Godlewski, Janette Villalobos, Dimitris Ioannis Collias, Juan Estaban Velasquez
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Abstract
Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided.
Claims20
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.
2 more elements
Dependencies are inferred from the claim text.