Nickel-based catalyst carrier and preparation method and application thereof, and nickel-based catalyst and preparation method and application thereof
A nickel-based catalyst, catalyst technology, applied in the directions of catalyst carrier, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problems of expensive preparation of raw materials, complex preparation process, uneven dispersion of nickel species, etc., and achieve carbon monoxide selectivity High, simple step operation, good activity and stability effect
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[0025] The invention provides a method for preparing a nickel-based catalyst carrier, the method comprising:
[0026] (1) The aluminum salt aqueous solution is contacted with a precipitant under alkaline conditions, aged, and separated to obtain an aluminum hydroxide hydrogel, and then the aluminum hydroxide hydrogel is sequentially washed with water and an alcohol solvent to obtain aluminum hydroxide alcohol gel;
[0027] (2) Under ultrasonic conditions, the aluminum hydroxide alcohol gel is contacted with the magnesium salt alcohol solution, then the solvent is removed, dried and roasted to obtain Mg-Al 2 o 3 carrier.
[0028] In the present invention, there is no special requirement for the aging conditions, and the specific implementation conditions can be determined according to the conventional drying conditions in this field. For example, the aging conditions generally include that the aging temperature can be 20-30°C, and the aging time can be 20-30°C. 2-16h.
[00...
Embodiment 1-1
[0061] 75.0gAl(NO 3 ) 3 9H 2 O was prepared as a 1000ml aqueous solution. Add 800ml of ammonia water with a concentration of 0.3mol / L in the three-necked flask; under the condition of continuous stirring, add the above-mentioned configured Al(NO 3 ) 3 aqueous solution. During the dropwise addition, ammonia water with a concentration of 0.3 mol / L was continuously added to the three-necked flask to maintain the pH of the system=11. After the entire dropping process was completed, the stirring was continued for 2 hours, and then left to stand at room temperature for aging for 10 hours, and the solid product obtained by separating it was aluminum hydroxide hydrogel. Add 2000ml of distilled water to the obtained aluminum hydroxide hydrogel for cleaning, fully beat and stir, then suction filter, and repeat cleaning 6 times according to the cleaning method. Then wash the aluminum hydroxide hydrogel with 500 ml of absolute ethanol, stir well after 2 hours, filter with suction, w...
Embodiment 1-2
[0065] 51.3gAl 2 (SO 4 ) 3 Prepare 1000ml of aqueous solution. Add 600ml of ammonia water with a concentration of 0.5mol / L into the three-necked flask; under the condition of continuous stirring, add the above-mentioned configured Al 2 (SO 4 ) 3 aqueous solution. During the dropwise addition, ammonia water with a concentration of 0.5 mol / L was continuously added to the three-neck flask to maintain the pH of the system=12. After the whole dropping process was completed, the stirring was continued for 1 hour, and then left to age at room temperature for 2 hours, and the solid product obtained by separating it was aluminum hydroxide hydrogel. Add 2000ml of distilled water to the obtained aluminum hydroxide hydrogel for cleaning, fully beat and stir, then suction filter, and repeat cleaning 6 times according to the cleaning method. Then wash the aluminum hydroxide hydrogel with 500 ml of absolute ethanol, stir well after 2 hours, filter with suction, wash 3 times according ...
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