Preparation method of dehydrogenation catalyst with low carbon deposition rate
A dehydrogenation catalyst and catalyst technology are applied in the field of preparation of propane dehydrogenation catalysts, which can solve the problems of difficulty in high dispersion, reduction of propane conversion rate and propylene selectivity, and deactivation of Pt active phase, and achieve stable active phase structure and process. The effect of mature technology and simple preparation method
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Embodiment 1
[0026] Weigh an alumina carrier (spherical, 1 mm in diameter, 0.73 cm in pore volume) containing a certain amount of Sn 3 / g, specific surface area 232m 2 / g, the carrier used in the following examples) 20ml, volume. A certain amount of sodium edetate was weighed and dissolved in deionized water, and the volume was adjusted to 30mL, and added to 20ml of Sn-containing alumina samples, aged for 4h, and dried at 80°C for 8h to obtain Sn and Na-containing alumina carrier samples. The dried sample is placed in a rotary evaporator, vacuumized, the absolute pressure of the system is controlled below 10kPa, the chloroplatinic acid solution is added to the above sample under normal pressure, and the vacuum treatment is continued, the absolute pressure of the system is controlled below 10kPa , heated to reflux, the heating temperature was 80°C, and the treatment time was 4h. Then the reflux was stopped and the solvent was evaporated to dryness. The sample obtained in the above steps ...
Embodiment 2
[0029] Weigh an alumina carrier (spherical, 1 mm in diameter, 0.73 cm in pore volume) containing a certain amount of Sn 3 / g, specific surface area 232m 2 / g, the carrier used in the following examples) 20ml. A certain amount of sodium edetate was weighed and dissolved in deionized water, and the volume was adjusted to 25mL, and added to 20ml of Sn-containing alumina sample, aged for 4h, and dried at 80°C for 8h to obtain a Sn, Na-containing alumina carrier sample. The dried sample is placed in a rotary evaporator, vacuumized, and the absolute pressure of the system is controlled below 10kPa. Under normal pressure, the chloroplatinic acid solution is added to the above sample, and the vacuum is continued. The absolute pressure of the system is controlled at Below 10kPa, heat to reflux, the heating temperature is 80°C, and the processing time is 4h. Then the reflux was stopped and the solvent was evaporated to dryness. The sample obtained in the above steps is placed in a tu...
Embodiment 3
[0031] Weigh an alumina carrier (spherical, 1 mm in diameter, 0.73 cm in pore volume) containing a certain amount of Sn 3 / g, specific surface area 232m 2 / g, the carrier used in the following examples) 20ml. Weigh a certain amount of sodium edetate and dissolve it in deionized water, dilute it to 35mL, and add it to the 20ml Sn-containing alumina sample. Aged for 4 hours, dried at 80°C for 8 hours to obtain an alumina carrier sample containing Sn and Na. The dried sample is placed in a rotary evaporator, vacuumized, and the absolute pressure of the system is controlled below 10kPa. Under normal pressure, the chloroplatinic acid solution is added to the above sample, and the vacuum is continued. The absolute pressure of the system is controlled at Below 10kPa, heat to reflux, the heating temperature is 70°C, and the processing time is 4h. Then the reflux was stopped and the solvent was evaporated to dryness. The sample obtained in the above steps is placed in a tubular hea...
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