Dow Global Technolgoies LLC

Rohm and Haas Company

Cargill Inc.

Sarah M Hoyt

Sanjib Biswas

Raymond P Roach

Robert Tengler

Leonard Edward Bogan, Jr

Timothy Charles Frank

Muhunthan Sathiosatham

Mark A Silvano

Andrew Michael Lemonds

Patrick H Au-Yeung

Sarah L Hruby

Cindy Hoppe

Bradley Harkrader

Pedro R Vargas, Ii

David C Decoster

David DeCoster

Hydroxycarboxylic acids, e.g., 3-hydroxypropionic acid, and/or their ammonium salts are dehydrated to their corresponding unsaturated carboxylic acids, e.g., acrylic acid, by a process that uses a catalyst comprising ammonium bisulfate. The use of ammonium bisulfate reduces or eliminates the problems associated with processes that use sulfuric acid as a dehydrating catalyst, e.g, excess sulfuric acid consumption and/or recovery.

Ammonium bisulfate catalyzed dehydration of beta-hydroxy acids

Methods and systems for producing high purity 3-hydroxypropionic acid (3-HP) from an aqueous medium, such as a fermentation broth, are described. Aqueous 3-HP solution can be purified by flash evaporation wherein the 3-HP is vaporized at an elevated temperature without conversion to acrylic acid. This process can be integrated with downstream processes for producing other chemical and consumer products.

3-hydroxypropionic acid compositions

Growing community of inventors

Greenwood, CO, United States of America

Sarah M Hoyt