Hydrocracking method for increasing production of high-quality middle distillates
A technology for middle distillate oil and hydrocracking, applied in the field of hydrocracking, can solve the problem of low selectivity of middle distillate oil, and achieve the effects of protecting activity and selectivity, maintaining activity stability and improving conversion depth.
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Embodiment 1
[0037] When the reaction pressure is 14.5MPa, the reaction temperature in the hydrofinishing section is 380°C, the reaction temperature in the hydrocracking section is 375°C, and the volume space velocity (for fresh raw materials) in the hydrofinishing section is 1.8h -1 , the volumetric space velocity of the hydrocracking section (for all feeds in the hydrocracking section) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test. The volume ratio between RN-32V and RHC-140 loaded in the hydrofinishing reactor is 3:1; the volume ratio between RN-32V and RHC-131 loaded in the hydrocracking reactor is 1:4. The ratio of fresh raw oil entering the hydrorefining reactor and the hydrocracking reactor is 6:1, and all tail oil fractions are recycled back to the hydrocracking reactor. H in the reaction atmosphere of the hydrocracking reactor 2 S partial pressure is 0.021MPa, NH 3 The partial ...
Embodiment 2
[0039] When the reaction pressure is 14.5MPa, the reaction temperature in the hydrofinishing section is 375°C, the reaction temperature in the hydrocracking section is 380°C, and the volume space velocity (for fresh raw materials) in the hydrofinishing section is 1.8h -1 , the volumetric space velocity of the hydrocracking section (for all feeds in the hydrocracking section) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test, the ratio of the RN-32V of hydrorefining reactor filling and RHC-140 catalyst is 1: 1; The volume ratio between catalyst RN-32V and RHC-131 is 1:2. The ratio of the fresh raw oil entering the hydrorefining reactor and the hydrocracking reactor is 1.5:1, and all tail oil fractions are recycled back to the hydrocracking reactor. H in the reaction atmosphere of the hydrocracking reactor 2 S partial pressure is 0.06MPa, NH 3 The partial pressure is 0.014MPa. T...
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