| 摘要 |
A hydrotreating process is presented for both dewaxing the diesel fraction and reducing the aromatic content of kerosene fraction of a distillate boiling range feed stream. The feed stream is flashed to generate vapor and liquid phase streams. The portion which comprises most of the heavy diesel is passed into a dewaxing zone. The vapor-phase stream, preferably rich in kerosene and light diesel, is used to quench the effluent of the dewaxing zone before it is passed into a downstream aromatics hydrogenation zone. Depending on the composition of the feed to the process, a second flashing step performed in the presence of added hydrogen may be employed to produce the feed to the dewaxing zone. PNA's may be hydrogenated prior to recycling to a hydrocracking zone.
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