Process for producing a carboxylic acid
AssigneeDaicel Chemical Industries, Ltd.
InventorsMasato Kawabe, Kenichi Yamamoto, Kazuyuki Matsuoka
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Abstract
A nitrile compound or an amide compound is hydrolyzed in the presence of an inorganic acid or other acidic catalyst or an alkali metal hydroxide or other basic catalyst, and the by-produced ammonium salt of the acidic catalyst or the produced salt of a carboxylic acid and a base is electrodialysed to form an acid and ammonia or aqueous ammonia, or to form a base and ammonia. The obtained acid or base may be recycled as a catalyst for the hydrolysis of the nitrile compound or amide compound, and the obtained ammonia is reutilized as a nitrogen source for the nitrile compound or amide compound. Such amide compound may be produced by hydration of a nitrite compound in the presence of a manganese oxide.
Claims20
A process for producing a carboxylic acid which comprises:
- (1) hydrolyzing a nitrile compound or an amide compound (a) in the presence of an acidic catalyst to form a carboxylic acid and an ammonium salt of the acidic catalyst, or (b) in the presence of a basic catalyst to form a salt of a carboxylic acid with the basic catalyst, and ammonia or aqueous ammonia, and
- (2a) electrodialysing the by-produced ammonium salt of the acidic catalyst to form an acid and ammonia or aqueous ammonia, or (2b) electrodialysing the produced salt of the carboxylic acid with the basic catalyst to form the corresponding carboxylic acid and the corresponding base.
Dependencies are inferred from the claim text.