Rectification of (meth)acrylic acid with the addition of a tenside
AssigneeBASF SE
InventorsUlrich Hammon, Holger Herbst, Gerhard Nestler
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Abstract
In a process for rectificative isolation of (meth)acrylic acid from a mixture containing, as main components, (meth)acrylic acid and an organic liquid having a higher boiling point than (meth)acrylic acid, the rectification is carried out with the addition of a surfactant.
Claims15
A process for the rectificative isolation of acrylic or methacrylic acid from a mixture containing, as main components, acrylic or methacrylic acid and an organic liquid having a higher boiling point than said acrylic or methacrylic acid, wherein the rectification is carried out with the addition of a surfactant.
A process for the preparation of acrylic or methacrylic acid by catalytic gas-phase oxidation of a C3-/C4-starting compound, in which the reaction gas mixture of the gas-phase oxidation is passed in countercurrent to a descending high-boiling inert hydrophobic organic liquid in an absorption column, the liquid discharge of the absorption column is then stripped with inert gas in a desorption column and said acrylic or methacrylic acid is isolated from the liquid discharge of the desorption column by rectification, wherein the rectificative isolation is carried out with the addition of a surfactant.
Dependencies are inferred from the claim text.