Method for recovering activity of low-activity hydro-upgrading catalyst
A hydrogenation modification and low activity technology, which is applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of hydrogenation modification catalyst activity reduction and achieve good activity recovery effect , The process is simple, and the effect of accelerating the stability of the activity
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Embodiment 1
[0024]The raw material oil after hydrofinishing treatment is introduced into the low-activity hydrogenation-modifying catalyst bed, the nitrogen content of the feedstock oil after hydrofinishing treatment is ~10ppm, and the weight content of the low-activity hydrogenation-modifying catalyst is Contain 60% Y molecular sieve, 0.3% nitrogen element, increase the reaction temperature to 355°C, adjust the temperature, control the conversion rate to be constant at 15%, and keep it stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, Stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 35%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 45%, and stabilize for 36 hours; The controlled conversion depth was the same as that of Comparative Example 1.
Embodiment 2
[0026] The raw material oil after hydrofinishing treatment is introduced into the low-activity hydrogenation-modifying catalyst bed, the nitrogen content of the feedstock oil after hydrofinishing treatment is ~10ppm, and the weight content of the low-activity hydrogenation-modifying catalyst is Contain 60% Y molecular sieve, 0.3% nitrogen element, increase the reaction temperature to 355°C, adjust the temperature, control the conversion rate to be constant at 18%, and keep it stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 28%, Stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 38%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 48%, and stabilize for 36 hours; the recovery process ends, adjust the process conditions to enter normal production, and The controlled conversion depth is t...
Embodiment 3
[0028] The raw material oil after hydrofinishing treatment is introduced into the low-activity hydrogenation-modifying catalyst bed, the nitrogen content of the feedstock oil after hydrofinishing treatment is ~10ppm, and the weight content of the low-activity hydrogenation-modifying catalyst is Contain 60% Y molecular sieve, 0.33% nitrogen element, increase the reaction temperature to 355°C, adjust the temperature, control the conversion rate to be constant at 12%, and keep it stable for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, Stable for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 37%, and stabilize for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 47%, and stabilize for 24 hours; the recovery process ends, adjust the process conditions to enter normal production, and The controlled conversion depth was...
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