Abstract:
Lube oils of improved viscosity index are prepared by hydrocracking a heavy oil charge stock, separating the lube oil portion of the product into a light cut and a heavy cut, extracting aromatics from the heavy cut, combining the extracted aromatics with the light cut and hydrogenating the mixture. The products may be used separately or the hydrogenated mixture may be combined with the extracted heavy cut.
Abstract:
Lubricating oils of improved viscosity index are prepared from residue-containing oils by a procedure comprising solvent extraction, hydrocracking, deasphalting and dewaxing.
Abstract:
The viscosity index of a hydrocracked lubricating oil stock boiling in the range of about 600*-1100* F. is increased by fractionating the stock into a light fraction boiling from 600* F. to about 750* F. and a bottoms fraction; mildly hydrogenating the light fraction and subsequently reblending the hydrogenated light fraction with the unhydrogenated fraction. Low boiling cracked hydrocarbons may be removed from the reblended lubricating oil to adjust the initial boiling point temperature to a desired value.
Abstract:
A DESULFURIZATION PROCESS FOR THE REDUCTION OF SULFUR IN A SULFUR CONTAINING HYDROCARBON OIL BY CONTACTING THE SULFUR CONTAINING HYDROCARBON OIL WITH OZONE IN THE PRESENCE OF A GROUP IV-B, V-B OR GROUP VI-B METAL FOLLOWED BY SULFUR REDUCTION UTILIZING FOR EXAMPLE A BASE TREATMENT, A THERMAL TREATMENT OR A HYDROSULFURIZATION TREATMENT.