Method for recovering activity of low-activity hydro-upgrading pour point depressing catalyst
A hydrogenation-upgrading, low-activity technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. The selection method is simple and the effect of high economic efficiency
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Embodiment 1
[0025] Feed the feedstock oil after hydrofining treatment into the bed of the low-activity hydrogenation-modifying-point-point-depressing catalyst. Contain 5% β molecular sieve and 0.20% nitrogen element by weight, increase the reaction temperature to 380°C, adjust the temperature, control the freezing point of diesel products to drop by 10°C, and stabilize for 36 hours; continue to adjust the reaction temperature to control diesel products Decrease in freezing point by 20°C and stabilize for 36 hours; continue to adjust the reaction temperature to control the decrease in freezing point of diesel products by 30°C and stabilize for 36 hours; after the recovery process is over, adjust the process conditions and enter normal production. .
Embodiment 2
[0027] Feed the feedstock oil after hydrofining treatment into the bed of the low-activity hydrogenation-modifying-point-point-depressing catalyst. Contain 5% β molecular sieve and 0.20% nitrogen element by weight, increase the reaction temperature to 380°C, adjust the temperature, control the freezing point of diesel products to drop by 15°C, and stabilize for 36 hours; continue to adjust the reaction temperature to control diesel products The freezing point drops by 25°C and stabilizes for 36 hours; continue to adjust the reaction temperature to control the freezing point of diesel products to drop by 35°C and stabilize for 36 hours; after the recovery process is over, adjust the process conditions and enter normal production, and the controlled pour point depression depth is the same as that of Comparative Example 2 .
Embodiment 3
[0029] Feed the feedstock oil after hydrofining treatment into the bed of the low-activity hydrogenation-modifying-point-point-depressing catalyst. The medium contains 5% β molecular sieve and 0.20% nitrogen element by weight. Increase the reaction temperature to 380°C, adjust the temperature, control the freezing point of diesel products to drop by 15°C, and stabilize for 24 hours; continue to adjust the reaction temperature to control diesel products. Decrease in freezing point by 20°C and stabilize for 24 hours; continue to adjust the reaction temperature to control the decrease in freezing point of diesel products by 35°C and stabilize for 24 hours; after the recovery process is over, adjust the process conditions and enter normal production. .
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