To obtain a carboxylic acid useful as a basic raw material for organic compounds, by hydrolyzing a carboxylic acid amide in the presence of a carboxylic acid having specific acid strength.
A carboxylic acid amide is hydrolyzed in the presence of a carboxylic acid having ≤4.5pKa (measured in an aqueous solution at 25°C) at 10-200°C, preferably 20-180°C for 30 minutes to 5 hours to give a corresponding carboxylic acid. Formic acid may be cited as the carboxylic acid having ≤4.5pKa and lactic acid amide as the carboxylic acid amide. The hydrolysis is carried out by using 1-100mol water and 1-50 equivalent of the carboxylic acid based on 1 equivalent of the carboxylic acid amide. This method is not followed by a by-product such as ammonium bisulfate, has no anxiety of industrial waste and is advantageous in terms of production cost.
YAMAMOTO KENICHI
HAN RITSUZUI
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