US 10,266,475 B2 · Method for producing acrylic acid

Abstract

A method for preparing acrylic acid, more specifically, to a method for preparing acrylic acid under a neutral condition at high yield in a short time without using a base, unlike the prior art in which a base is essentially used. The acrylic acid is produced using a supported catalyst having a specific composition when preparing acrylic acid by oxidation of allyl alcohol. Particularly, the preparation method can recover acrylic acid rather than acrylic acid salt as a final product, and thus has an advantage that the overall process cost can be reduced by eliminating essential processes in the prior art, such as ion exchange after the acidification process required for the conversion of acrylic acid salt to acrylic acid.

Claims10

Dependent claims

A method for preparing acrylic acid, the method comprising oxidizing allyl alcohol in the presence of a catalyst at a pH of 6-8, wherein:

the catalyst is a supported catalyst in which a metal catalyst is supported on a support;
the metal catalyst is selected from the group consisting of an Au-transition metal alloy catalyst, a transition metal catalyst, and a combination thereof;
and
the support is selected from the group consisting of MgO, Mg(OH)2, Al2O3, cHT (calcined hydrotalcite), hydroxyapatite(Ca5(OH)(PO4)3), ZnO, Zr(OH)2 and a combination thereof.

1 more element

Dependencies are inferred from the claim text.

Method for producing acrylic acid

Life of this patent

Method for producing acrylic acid

Life of this patent

Abstract

Claims10