Method for producing acrylic acid
AssigneeEvonik Degussa GmbH
InventorsFranz-Felix Kuppinger, Florian Klasovsky, Alexander May, Min-Zae Oh
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Abstract
Method for producing acrylic acid by dehydration of a C3 hydroxycarboxylic acid, characterized in that dehydration is achieved by contacting, at a temperature of more than 150° C., the hydroxycarboxylic acid with a mixture which is liquid at this temperature and comprises at least one metal salt of a C3 hydroxycarboxylic acid, and water.
Claims15
A method for producing acrylic acid by the dehydration of a C3 hydroxycarboxylic acid, comprising the step of contacting the C3 hydroxycarboxylic acid with a liquid mixture at a temperature of more than 150° C., wherein the liquid mixture comprises at least one alkali metal salt or alkaline earth metal salt of a C3 hydroxycarboxylic acid, and water.
A method for producing a superabsorbent polymer comprising a step of producing a monomer component containing an acrylic acid made by dehydration of a C3 hydroxycarboxylic acid, wherein the dehydration is achieved by contacting, at a temperature of more than 150° C., a hydroxycarboxylic acid with a liquid mixture at this temperature and comprises at least one metal salt of a C3 hydroxycarboxylic acid, and water.
Dependencies are inferred from the claim text.