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US 12,545,634 B2Granted
Method for preparing acrylic acid
AssigneeLG Chem, Ltd.
InventorsByeong Gil Lyu, Mi Kyung Kim, Eun Kyo Kim, Hye Bin Kim
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Abstract
Provided is a method for preparing an acrylic acid including: dehydrating a lactic acid aqueous solution in a reaction unit to prepare a reaction product stream; passing the reaction product stream through a cooling unit and a refining unit sequentially and supplying a discharge stream from the refining unit to an acrylic acid separation column; and separating an unreacted lactic acid as a side discharge stream and separating the acrylic acid as an upper discharge stream in the acrylic acid separation column.
Claims11
A method for preparing an acrylic acid, the method comprising:
- dehydrating a lactic acid aqueous solution in a reaction unit to prepare a reaction product stream;
- passing the reaction product stream through a cooling unit and a refining unit sequentially and supplying a discharge stream from the refining unit to an acrylic acid separation column;
- and
- separating an unreacted lactic acid as a side discharge stream and separating the acrylic acid as an upper discharge stream in the acrylic acid separation column.
1 more element
Dependencies are inferred from the claim text.