PROCESS FOR PRODUCING BOTH FUEL AND LUBRICATING OIL FROM SINGLE INTEGRATED HYDROCRACKING SYSTEM

摘要

PURPOSE: Provided is a process for producing both fuel and lubricating oil from a single integrated hydrocracking system, by which it is possible to produce a high yield and high quality fuel as well as lubricant stream having and a wide viscosity range and a wide viscosity index range. CONSTITUTION: A liquid hydrocarbon feedstock is contacted with hydrogen over a first catalyst in a hydroprocessing zone to yield a first effluent containing a normal liquid fraction. The hydroprocessing zone is operated at either hydrotreating or hydrocracking conditions and also is operated at conditions effective to remove impurities contained in the feedstock. The normally liquid fraction is separated from the first effluent by boiling point range to yield at least a first lubricating oil product, a first fuel product and a bottom fraction. At least a portion of the bottom fraction is contacted with a second catalyst in a hydrocracking zone operated at conditions effective to hydrocrack the bottom fraction to yield a second effluent. The second effluent is separated according to the boiling point range to yield an overhead stream and a recycle stream. The recycle stream is recycled to the hydrocracking zone.