Claims
- 1. A process for preparing a heteroaromatic aldehyde by catalytic reaction of an alkyl-substituted heteroaromatic compound with molecular oxygen in a gaseous phase in the presence of a catalyst, which comprises employing an oxide containing vanadium, phosphorus, aluminum and silicon as a catalyst, and diluting a part or all of the oxide present as a catalyst layer in a reactor with a solid inert to the reaction, wherein the alkyl-substituted heteroaromatic compound is at least one selected from the group consisting of an alkyl-substituted pyridine, an alkyl-substituted pyrazine and an alkyl-substituted pyrimidine.
- 2. A process according to claim 1 wherein the catalyst is an oxide represented by the formula (I):VaPbAlcSidOe (I) wherein a, b, c, d and e represent atomic ratios of vanadium, phosphorus, aluminium, silicon and oxygen, respectively, b is 0.3 to 3, c is 0 (zero) to 2 excepting 0 (zero), d is 0 (zero) to 6 excepting 0 (zero) when a is 1, and e is decided by an atomic valence of oxygen and an atomic valence and an atomic ratio of the other elements.
- 3. A process according to claim 1, wherein the solid inert to the reaction is at least one selected from the group consisting of silica, alumina, silica-alumina, silicon carbide, diatomaceous earth and zeolite.
- 4. A process according to claim 1 wherein an ratio of the alkyl-substituted heteroaromatic compound to the molecular oxygen is from 0.4 to 3.0 moles of the molecular oxygen based on 1 mole of the alkyl-substituted heteroaromatic compound.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10-360412 |
Dec 1998 |
JP |
|
Parent Case Info
This application is a 371 of PCT/JP99/06983 filed Dec. 13, 1999.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/JP99/06983 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/37446 |
6/29/2000 |
WO |
A |
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5059716 |
Joentgen et al. |
Oct 1991 |
A |
Foreign Referenced Citations (2)
Number |
Date |
Country |
298 234 |
Feb 1987 |
DE |
11-35561 |
Feb 1999 |
JP |
Non-Patent Literature Citations (2)
Entry |
HCaplus DN 130:209602, English Abstract JP 11035561. Feb. 1999.* |
International Search Report. |