Alumina carrier, hydrodemetallization catalyst and preparation method of hydrodemetallization catalyst
A technology of alumina carrier and alumina, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., and can solve the problems of specific surface area and mechanical strength reduction
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Embodiment 1
[0056] Weigh 30 grams of activated carbon with a particle size of 10 microns, spray and impregnate the activated carbon with a phosphoric acid solution with a mass concentration (calculated as phosphorus pentoxide) of 6% to saturate the activated carbon. Stone (manufactured by Wenzhou Jingjing Alumina Co., Ltd.), 8 grams of Sesame powder, mixed evenly, adding an appropriate amount of 1.5% acetic acid aqueous solution, kneaded, extruded, and dried at 110°C for 6 hours, and dried in air atmosphere , and calcined at 650°C for 5 hours to obtain the alumina carrier intermediate ZA1.
[0057] Weigh 100 grams of the above-mentioned alumina carrier intermediate ZA1, place it in 600 grams of ammonium bicarbonate solution, the mass concentration of the ammonium bicarbonate solution is 18% in an aqueous solution, transfer the mixed material into an autoclave and seal it, and heat it at 15°C Raise the temperature to 100°C at a speed of 10°C / min and keep the temperature for 3 hours, then r...
Embodiment 2
[0060] Same as Example 1, except that activated carbon is changed to wood chips with a particle size of 8 microns, the amount of wood chips added is 36 grams, the phosphoric acid solution is changed to boric acid solution, and the mass concentration of the solution (calculated as boron oxide) is 8% to obtain an alumina carrier intermediate ZA2. The quality of ammonium bicarbonate solution is 800 grams, and the mass concentration of ammonium bicarbonate solution is 17.5%. The sealing pretreatment temperature is 90°C, the treatment time is 2 hours, the heat treatment temperature is 120°C, the treatment time is 8 hours, the sorbitol solution is changed to glucose solution, the mass concentration of the solution is 15%, and the consumption of the solution is 6ml. Aluminum carrier A2, 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-sized pores is mainly 2.5-7.5 μm, the length of the rod-shaped alumin...
Embodiment 3
[0062]Same as Example 1, except that the activated carbon is changed to a particle size of 5 microns, the addition is 40 grams, the phosphoric acid solution is changed to an ammonium monohydrogen phosphate solution, and the mass concentration of the solution (calculated as phosphorus pentoxide) is 10%, to obtain aluminum oxide Carrier intermediate ZA3. The quality of ammonium bicarbonate solution is 800 grams, and the mass concentration of ammonium bicarbonate solution is 20%. The heating rate before the sealing pretreatment was 11°C / min, the heating rate after the sealing pretreatment was 5°C / min, the heat treatment temperature was 150°C, the treatment time was 4 hours, the sorbitol solution was changed to the mannitol solution, the quality of the solution The concentration was 30%, and the amount of the solution was 5ml to prepare the 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 th...
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