Patent ID: 6623624
Filing Date: 2003-09-23
Classification: C10G

Abstract:
An integrated process for producing both fuels and lubricating oil products from a single integrated hydrocracking system, which produces high yields of high quality fuels, while maintaining flexibility for selecting the desired product properties for the lubricating oil products recovered from the process, comprising the steps of:a. contacting a liquid hydrocarbon feedstock with hydrogen over a first catalyst in a hydroprocessing zone which may be operated at either hydrotreating or hydrocracking conditions, which is operated at conditions effective to remove impurities contained in the feedstock, to yield a first effluent containing a normally liquid fraction; b. separating the normally liquid fraction from the first effluent by boiling point range in an atmospheric separation zone to produce a first fuel product and a heavy fraction; c. separating the heavy fraction of step (b) in a vacuum separation zone to yield a first lubricating oil product and a bottom fraction; d. contacting at least a portion of the bottom fraction of step (c) with a second catalyst in a hydrocracking zone operated at conditions effective to hydrocrack the bottom fraction, to yield a second effluent; e. separating the second effluent of step (d) by boiling point range to yield an overhead stream and a recycle stream: and f. recycling the recycle stream of step (e) to the hydrocracking zone.