Two-stage hydrocracking method
A hydrocracking and hydrotreating technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of large circulation volume of kerosene distillates, increased equipment investment, complicated operation, etc., and achieves improvement of product quality, Improving the quality and increasing the effect of the smoke point
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Embodiment 1-3
[0034] use figure 1 The process flow diagram shown. The hydrotreating reactor uses FF-46 hydrocracking pretreatment catalyst, and the hydrocracking reactor adopts a catalyst system of hydrocracking catalyst I / hydrocracking catalyst II graded in different volume ratios. In Examples 1-3, in the hydrocracking reactor, the volume ratios of hydrocracking catalyst I / hydrocracking catalyst II were 2:1, 1:1 and 1:2 respectively, and the properties of the feed oil are shown in Table 1.
[0035] At a reaction pressure of 15.0MPa, the volume ratio of hydrogen to oil in the refining section and the cracking section is 900:1 and 1100:1 respectively, and the volume space velocity of the refining section and the cracking section is 1.0h -1 and 1.2h -1 Under the conditions of > 350 ° C, the process test with a conversion rate of about 80wt% was carried out, and the product quality of each fraction was investigated.
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