Process for preparing anisaldehyde
AssigneeTanabe Seiyaku Co., Ltd.
InventorsManabu Matsuoka, Hiroyasu Seko
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Abstract
Preparation of anisaldehyde by the oxidation of p-methoxytoluene in the vapor phase in the presence of a catalyst consisting of vanadium oxide, phosphorus oxide and potassium sulfate or a catalyst consisting of vanadium oxide, phosphorus oxide, potassium sulfate and copper oxide. The catalyst has excellent selectivity and, as a result, anisaldehyde is obtained in high yields. Further, the catalyst containing copper oxide has excellent durability.
Claims6
In a process for preparing anisaldehyde by oxidizing p-methoxytoluene in the presnece of a catalyst, the improvement which comprises bringing the vapor of p-methoxytoluene together with an oxidant into contact with a catalyst at a bath temperature of about 430.degree. to about 520.degree. C.;
- said catalyst consisting esentially of vanadium oxide, about 0.2 to about 0.8 mole of phosphorus oxide per mole of vanadium oxide, about 1.5 to about 2.5 moles of potassium sulfate per mole of vanadium oxide and 0 to about 0.1 moles of copper oxide per mole of vanadium oxide.
Dependencies are inferred from the claim text.