Process for producing aromatic carboxylic acids
AssigneeDaicel Chemical Industries, Ltd.
InventorsYasutaka Ishii, Tatsuya Nakano
Life of this patent
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Abstract
An aromatic compound (C) is reacted with carbon monoxide (D) and molecular oxygen (E) in the presence of a palladium compound catalyst (A) and a catalyst (B) and thereby yields a aromatic carboxylic acid corresponding to the aromatic compound (C) except with one or more carboxyl groups bonded to its aromatic ring. The catalyst (B) contains a heteropolyacid or a salt thereof (B1) or a mixture of oxo acids and/or salts thereof (B2), and the mixture (B2) contains, as a whole, one of P and Si and at least one selected from V, Mo and W.
Claims3
A process for producing an aromatic carboxylic acid, comprising the step of reacting an aromatic compound (C) with carbon monoxide (D) and molecular oxygen (E) in the presence of a palladium compound catalyst (A) and a catalyst (B) to thereby yield an aromatic carboxylic acid corresponding to the aromatic compound (C) except with one or more carboxyl groups bonded to its aromatic ring,
- the catalyst (B) comprising:
- a heteropolyacid or a salt thereof (B1);
- and/or
- a mixture of oxo acids and/or salts thereof (B2),
- the mixture (B2) containing, as a whole, one of P and Si and at least one selected from the group consisting of V, Mo and W.
Dependencies are inferred from the claim text.