Method for producing heteroaromatic aldehydes
A kind of aromatic aldehyde, technology of manufacturing method, applied in the direction of organic chemistry method, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc.
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Embodiment 1
[0032] The preparation of embodiment 1 catalyst
[0033] 500 g of ion-exchanged water and 45.6 g of 85% phosphoric acid were mixed under stirring, and after the temperature was raised to 90° C., 30.0 g of vanadium pentoxide, 84.1 g of 10% by weight of alumina sol and 19.8 g of silica gel were added, and stirred at this temperature for 20 minute. The obtained mixture was concentrated, and the concentrate was dried at 200° C. for a whole day and night, and then baked at 640° C. for 4 hours in an air current. After this operation, the atomic ratio for removing oxygen is V 1 P 1.2 al 0.5 Si 1.0 of oxides.
[0034] Manufacture of 4-alpyridine
[0035] Using the oxide obtained above as a catalyst, 4-alpyridine was produced. Let the atomic ratio of the above-mentioned deoxygenation be V 1 P 1.2 al 0.5 Si 1.0 The particle size of the oxide is 1.0-1.7mm (10-16 mesh). Fill 5 ml of the oxide having the above-mentioned particle diameter into a reaction tube made of Pyres with ...
Embodiment 2
[0036] The preparation of embodiment 2 catalyst
[0037] Except that the consumption of 85% phosphoric acid in embodiment 1 is changed into 34.2g, the consumption of silica gel is changed into 9.9g, other carry out the preparation of catalyst identically with embodiment 1, obtain the atomic ratio that removes oxygen is V 1 P 1.8 al 1.0 Si 1.0 of oxides.
[0038] Manufacture of 4-alpyridine
[0039] except that the atomic ratio used to remove oxygen is V 1 P 1.8 al 1.0 Si 1.0 The oxide replaces the atomic ratio of removing oxygen in Example 1 to be V 1 P 1.2 al 0.5 Si 1.0 oxide as a catalyst, except that the temperature of the catalyst filling part of the reaction tube was raised to 360° C., and the manufacture of 4-alpyridine was carried out in the same manner as in Example 1 [filling ratio (weight ratio) to the reaction tube: oxide / silicon carbide = 1 / 0.66]. The results are shown in Table 1.
Embodiment 3
[0041] Catalyst preparation
[0042] Except that the consumption of 85% phosphoric acid in embodiment 1 is changed into 19.0g, other carry out the preparation of catalyst identically with embodiment 1, obtain the atomic ratio that removes oxygen is V 1 P 0.5 al 0.5 Si 1.0 of oxides.
[0043] Manufacture of 4-alpyridine
[0044] except that the atomic ratio used to remove oxygen is V 1 P 0.5 al 0.5 Si 1.0 The oxide replaces the atomic ratio of removing oxygen in Example 1 to be V 1 P 1.2 al 0.5 Si 1.0 oxide as a catalyst, and the temperature of the catalyst filling part of the reaction tube was raised to 300° C., and the manufacture of 4-alpyridine was carried out in the same manner as in Example 1 [filling ratio (weight ratio) to the reaction tube: oxide / silicon carbide = 1 / 0.86). The results are shown in Table 1. The preparation of comparative example 1 catalyst
[0045] According to the description in Japanese Patent Publication No. 56-45815, vanadyl pyrophosp...
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