A kind of carrier for hydrogenation protective agent, catalyst and preparation method thereof
A technology of hydrogenation protection and catalyst support, which is applied in the direction of catalyst activation/preparation, catalyst support, chemical instruments and methods, etc., can solve the problems of unfavorable precipitation and removal, achieve high anti-coking ability, promote penetration and Uniformity, enhanced mechanical strength effect
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Embodiment 1
[0050] Weigh 260 grams of pseudo-boehmite dry rubber powder (manufactured by Wenzhou Jingjing Alumina Co., Ltd.), 60 grams of activated carbon with a particle size of 10 microns, and 8 grams of asparagus powder. 1.5% acetic acid aqueous solution was kneaded, extruded into strips, and the molded product was dried at 100 °C for 6 hours, and the dried product was calcined at 700 °C for 5 hours in an air atmosphere to obtain an alumina carrier intermediate ZA1.
[0051] Weigh 100 grams of above-mentioned alumina carrier intermediate ZA1, place in 800 grams of ammonium bicarbonate solution, the mass concentration of this ammonium bicarbonate solution is in the aqueous solution of 20%, the mixture material is transferred into the autoclave and sealed at 15 ℃. The temperature was raised to 100°C at a rate of / min for 3 hours, then heated to 160°C for 6 hours at a rate of 10°C / min, and then the carrier was dried at 100°C for 6 hours.
[0052] Weigh 100 grams of the above-mentioned mat...
Embodiment 2
[0054] The same as in Example 1, except that the activated carbon is changed to polyvinyl alcohol with a particle size of 6 microns, and the polyvinyl alcohol addition amount is 50 grams to obtain an alumina carrier intermediate ZA2. The mass of the ammonium bicarbonate solution is 600 grams, and the mass concentration of the ammonium bicarbonate solution is 17.5%. The sealing pretreatment temperature is 90°C, the treatment time is 2 hours, the heat treatment temperature is 140°C, and the treatment time is 8 hours. During spray dipping, potassium nitrate is changed to magnesium nitrate, and the mass concentration of the solution (calculated as oxide) is 4%. The dosage of the solution was 10 mL, and the alumina carrier A2 was prepared. The properties of the carrier are shown in Table 1. In the alumina carrier A2, the length of the rod-shaped alumina in the micron-scale pores is mainly 2.0-5.4 μm, the length of the rod-shaped alumina on the outer surface of the main alumina is m...
Embodiment 3
[0056] The same as in Example 1, except that the activated carbon is changed to wood chips with a particle size of 10 microns, and the addition of the wood chips is 75 grams to obtain the alumina carrier intermediate ZA3. The mass of the ammonium bicarbonate solution is 1000 grams, and the mass concentration of the ammonium bicarbonate solution is 15%. The heating rate before sealing pretreatment was 11°C / min, the heating rate after sealing pretreatment was 5°C / min, the heat treatment temperature was 170°C, and the treatment time was 4 hours. The mass concentration (calculated as oxide) was 1%, and the amount of solution was 15 mL to obtain alumina carrier A3. The properties of the carrier are shown in Table 1. In the alumina carrier A3, the length of the rod-shaped alumina in the micron-scale pores is mainly 3.0-9.0 μm, the length of the rod-shaped alumina on the outer surface of the main alumina is mainly 3.0-8.0 μm, and the outer surface of the main alumina is mainly 3.0-8....
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