TWO-STAGE HYDROCRACKING PROCESS FOR MAKING HEAVY LUBRICATING BASE OIL FROM A HEAVY COKER GAS OIL BLENDED FEEDSTOCK

摘要

The present invention is directed to a refining process for producing heavy lubricating base oils (LBO) from a blended hydrocarbonaceous feedstock containing a heavy coker gas oil, a visbroken gas oil, heavy cycle oil, oils from residue hydrocracking, aromatic extract or any other feedstock normally not conducive to lube oil basestock production, using a two-stage hydrocracking process.

主权项

1. A process for producing a heavy lubricating base oil, comprising:
hydrocracking a heavy coker gas oil-containing feedstock to produce a hydrocracked heavy coker gas oil-containing feedstock; distilling the hydrocracked heavy coker gas oil-containing feedstock to form at least one middle distillate fraction and a distillation bottoms fraction; further distilling the distillation bottoms fraction to form at least one light vacuum gas oil fraction and at least one heavy lubricating base oil feedstock fraction; hydrocracking the at least one light vacuum gas oil fraction to form a hydrocracked light vacuum gas oil fraction.