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US 12,565,464 B2Granted
Production of acrolein or acrylic acid from allyl alcohol with high yield and low impurity
AssigneeRohm and Haas Company
InventorJinsuo Xu
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Abstract
Acrolein is produced by selectively oxidizing allyl alcohol over a first mixed metal oxide catalyst in the presence of oxygen in the vapor phase. The first mixed metal oxide catalyst comprises oxides of molybdenum and bismuth. Acrylic acid is produced by selectively oxidizing the acrolein over a second mixed metal oxide catalyst in the presence of oxygen in the vapor phase. The second mixed metal oxide catalyst has a different composition from the first mixed metal oxide catalyst.
Claims7
A method comprising:
- selectively oxidizing allyl alcohol over a first mixed metal oxide catalyst in the presence of water and oxygen in the vapor phase to produce acrolein wherein a mass ratio of propionaldehyde to acrolein is less than 0.001, and
- selectively oxidizing the acrolein over a second mixed metal oxide catalyst in the presence of oxygen in the vapor phase to produce acrylic acid at a yield of acrylic acid based on allyl alcohol feed of greater than 80% wherein a mass ratio of propionic acid to acrylic acid is less than 0.001;
- wherein the first mixed metal oxide catalyst comprises oxides of molybdenum and bismuth;
- and
- wherein the second mixed metal oxide has a different composition from the first mixed metal oxide catalyst.
2 more elements
Dependencies are inferred from the claim text.