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AssigneeThe Procter & Gamble Company
InventorsJuan Estaban Velasquez, Janette Villalobos Lingoes, Jane Ellen Godlewski, Dimitris Ioannis Collias, Fred C. Wireko, Marc Andrew Mamak, Nancy Lee Redman-Furey
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Catalysts for dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity, short residence time, and without significant conversion to undesired side products, such as, for example, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed condensed phosphates. Methods of preparing the catalysts are also provided.
A catalyst comprising a condensed phosphate salt mixture of KPO3 and a pyrophosphate salt selected from the group consisting of Ba2P2O7, Ca2P2O7, and MnKP2O7, wherein the molar ratio of phosphorus to the cations in the condensed phosphate salt mixture is between about 1 and 1.3.
Dependencies are inferred from the claim text.