Preparation of 3-cyanopyridine
A technology of cyanopyridine and picoline, which is applied in the field of preparing 3-cyanopyridine, can solve problems such as the actual level of difficult fluidized bed catalysts, achieve good reaction stability, improve reaction selectivity, enhance oxygen adsorption capacity and Effect
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Examples
Embodiment 1
[0047] Catalyst preparation:
[0048] 224g V 2 o 5 Add it into a solution at a temperature of 80-90° C. consisting of 490 milliliters of water and 468 grams of oxalic acid, stir well, and react to obtain a vanadium oxalate solution.
[0049] Set the concentration weight percent to 40% SiO 2 1250 grams of silica sol are slowly added in the above-mentioned solution under stirring, then add respectively by 886 grams of Cr (NO 3 ) 3 9H 2 A solution of O and 300 ml of water, 76.3 g of H 3 BO 3 and 560 ml of water and 85 g of 85% H 3 PO 4 and 50 ml of water, and finally add 24.9 g of KNO 3 20 milliliters of the aqueous solution, stirred, heated and evaporated to a solid content of 40% (weight), to obtain a thick slurry.
[0050] The catalyst formed by spray drying the above slurry was dried at 120°C for 12 hours and calcined at 650°C for 5 hours to obtain catalyst composition V 1.00 Cr 0.90 B 0.50 P 0.30 K 0.10 / SiO 2 , The catalyst main loading weight ratio is 50 / 50...
Embodiment 2～4
[0059] Using the same catalyst preparation method and evaluation conditions as in Example 1, the composition was changed to prepare the catalyst, and the evaluation results are listed in Table 1.
[0060] Example
Embodiment 5
[0062] Prepare catalyst with catalyst composition and preparation method of embodiment 1, change evaluation condition to be: 3-picoline: NH 3 : Air = 1:6:45 (mol), catalyst weight loading (WWH) 0.10 hours -1 , the reaction temperature is 425°C, and the reaction pressure is 0.01MPa.
[0063] The result of the reaction is:
[0064] 3-picoline conversion 99.6%
[0065] 3-cyanopyridine selectivity 88.2%
[0066] 3-cyanopyridine yield 87.9%
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Description
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Application Information
- IPC
- C07D213/85
- Inventors
- 陈金华; 顾龙勤