Catalyst for producing epoxypropane by liquid phase one-step oxidation of propylene and preparation method
A technology of propylene oxide and catalyst, which is applied in the field of catalysts and preparations for the one-step oxidation of propylene to propylene oxide, and can solve the problems of catalyst reusable performance degradation and easy loss of catalysts, etc.
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Examples
Embodiment 1
[0020] Add 20ml of tetraethyl orthosilicate (TEOS) and 20ml of absolute ethanol into the three-necked flask, then add 40ml of ammonia solution with pH=9.1, stir at 80°C for 60 minutes, then add 3ml of formamide dropwise under stirring, and then Add dropwise 40ml containing 1.2g ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) and 0.005g ammonium chloride (NH 4 Cl) mixed aqueous solution, vigorously stirred for 10 minutes; then stood and aged at 80°C for 3h; the obtained gel was aged at room temperature for one week, dried at 100°C, ground, and roasted in air at 550°C for 5h to obtain 1# catalyst, catalyst The performance evaluation results are shown in Table 1.
Embodiment 2
[0022] NH in Example 1 4 The amount of Cl was changed to 0.02g, and other processes were the same as in Example 1 to obtain 2# catalyst, and the catalyst performance evaluation results are shown in Table 1.
Embodiment 3
[0024] NH in Example 1 4 The amount of Cl was changed to 0.04g, and other processes were the same as in Example 1 to obtain the 3# catalyst. The catalyst performance evaluation results are shown in Table 1.
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Application Information
- IPC
- B01J27/132; C07D303/04; C07D301/19
- CPC
- Y02P20/52
- Inventors
- 卢冠忠; 苗永霞