Titania-alumina mixed oxide hydrodesulfurization catalyst and preparing process thereof
A composite oxide and composite carrier technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of difficult to achieve deep desulfurization, mechanical strength, thermal Problems such as poor stability, small specific surface area and pore volume
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Embodiment 1
[0014] Weigh a certain amount of AlCl 3 or Al(NO 3 ) 3 , using 5M ammonia water to dissolve, the amount of ammonia water used is just to make AlCl 3 or Al(NO 3 ) 3 The amount of gel formed is then centrifuged, and the above-mentioned aluminum gel is washed with deionized water, and suction-filtered and washed under vacuum until the pH value of the system is greater than 9.20. Then add 5M nitric acid in proportion to degumming until the pH value of the system is about 4.20, and the obtained aluminum sol acts in an ultrasonic water bath for 10 minutes (the temperature of the water in the ultrasonic bath during the entire ultrasonic process is less than 32 ° C), and a certain amount of aluminum sol is weighed. Amount of Ti(OC 4 h 9 ) 4 Dissolved in ethanol, Ti(OC 4 h 9 ) 4 The molar ratio with ethanol was 1:5 to obtain tetrabutyl titanate solution A; water and nitric acid were dissolved in ethanol in sequence, and the molar ratio of water, nitric acid and ethanol was 1:...
Embodiment 2
[0017] The same method as in Example 1, and then the obtained gel was vacuum-dried at 110°C for 10 hours (vacuum degree less than 80mmHg), and then the gel was dried at 400°C, 500°C, 550°C, 600°C, 700°C, 800°C and 900°C. Calcined at the same temperature for 4 hours to obtain composite oxide supports with different calcined temperatures.
Embodiment 3
[0019] In the same way as in Example 1, during the drying process of the carrier and the catalyst, microwave drying was used instead of conventional oven drying, and a "Midea" microwave oven was used to dry for 15 minutes at a power of 800W.
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