Method for recovering activity of low-activity hydrogenation-upgrading catalyst
A technology for hydrogenation upgrading and activity recovery, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the reduction of the activity of hydrogenation upgrading catalysts, and achieve good activity recovery effect and energy saving. , the effect of simple selection
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Embodiment 1
[0025]Into the bed of the low-activity hydro-upgrading catalyst, feed the feedstock oil after hydrofinishing treatment, the nitrogen content of the feedstock oil after hydrofinishing treatment is 10ppm, and the content of the low-activity hydro-upgrade catalyst is calculated by weight Contain 35% Y molecular sieve, 0.25% nitrogen element, increase the reaction temperature to 370°C, adjust the temperature, control the conversion rate to be constant at 15%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, stable 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 35%, and stabilize for 36 hours; the recovery process ends, adjust the process conditions to enter normal production, and the controlled conversion depth is the same as that of Comparative Example 1.
Embodiment 2
[0027] Into the bed of the low-activity hydro-upgrading catalyst, feed the feedstock oil after hydrofinishing treatment, the nitrogen content of the feedstock oil after hydrofinishing treatment is 10ppm, and the content of the low-activity hydro-upgrade catalyst is calculated by weight Contain 35% Y molecular sieve, 0.25% nitrogen element, increase the reaction temperature to 370°C, adjust the temperature, control the conversion rate to be constant at 18%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 28%, stable 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 38%, and stabilize for 36 hours; the recovery process is over, adjust the process conditions to enter normal production, and the controlled conversion depth is the same as that of Comparative Example 2.
Embodiment 3
[0029] Into the bed of the low-activity hydro-upgrading catalyst, feed the feedstock oil after hydrofinishing treatment, the nitrogen content of the feedstock oil after hydrofinishing treatment is 10ppm, and the content of the low-activity hydro-upgrade catalyst is calculated by weight Contain 35% Y molecular sieve, 0.28% nitrogen element, increase the reaction temperature to 370°C, adjust the temperature, control the conversion rate to be constant at 12%, and stabilize for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, stable 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 37%, and stabilize for 24 hours; the recovery process is over, adjust the process conditions to enter normal production, and the controlled conversion depth is the same as that of Comparative Example 1.
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