Method of producing middle distillate producing by two-stage...

Details Method of producing middle distillate producing by two-stage... Method of producing middle distillate producing by two-stage...

C - Chemistry, Metallurgy

10

G

C10G 65/10 (2006.01) C10G 49/00 (2006.01)

Patent

CA 2338596

The two-stage hydrocracking process of the present invention comprises bringing the first-stage feed oil containing a hydrocarbon component and having a boiling point of 316°C or higher into contact with the first-stage catalyst in the presence of hydrogen to obtain a first- stage product; separating the first-stage product into heavy component and light component containing the middle distillate products; bringing the second-stage feed oil containing heavy component of the first-stage reaction product into contact with the second-stage catalyst in the presence of hydrogen to obtain the second-stage product; separating the second-stage product into heavy component and light component comprising middle distillate products and recycling part of the heavy component of the second- stage product to the second-stage feed oil. Hydrocracking activity of the first-stage catalyst is higher than hydrocracking activity of the second-stage catalyst. The conversion percentage is high and this hydrocracking reaction proceeds with long-term stability and at a high selectivity of middle distillate products.

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