Production of lubricating oil

Claim 1

A PROCESS FOR THE PRODUCTION OF LUBRICATING OIL WHICH COMPRISES PREPARING A HYDROFINED PREDOMINANTLY PARAFFINIC HYDROCARBON OIL FEED HAVING AN INITIAL BOILING POINT OF AT LEAST 750*F., BOILING OVER A RANGE OF AT LEAST 50*F. AND CONTAINING LESS THAN 10 P.P.M. NITROGEN, PASSING SAID FEED AND AT LEAST 2000 STANDARD CUBIC FEET OF HYDROGEN PER BARREL OF SAID FEED INTO CONTACT IN A HYDROCRACKING ZONE WITH A HYDROCRACKING CATALYST HAVING HYDROCRACKING AND ISOMERIZING ACTIVITY AND COMPRISING A HYDROGENATING-DEISOMERIZING COMPONENT SELECTED FROM THE GROUP CONSISTING OF NICKEL SULFIDE AND COBALT SULFIDE, AND AN ACTIVE ACIDIC REFRACTORY OXIDE CRACKING COMPONENT, AT 0.2 TO 15.0 LHSV, 400* TO 710*F., AND 500 TO 5000 P.S.I.G. WHEREBY PARAFFINS ARE HYDROCRACKED AND ISOMERIZED, SEPARATING THE EFFLUENT FROM SAID HYDROCRACKING ZONE INTO FRACTIONS INCLUDING (1) AT LEAST ONE NORMALLY LIQUID OIL FRACTION BOILING ABOVE THE INITIAL BOILING POINT OF SAID FEED, (2) AT LEAST ONE NORMALLY LIQUID LUBRICATING OIL PRODUCT FRACTION BOILING BETWEEN 650*F. AND THE INITIAL BOILING POINT OF SAID FEED, (3) AT LEAST ONE ADDITIONAL NORMALLY LIQUID FRACTION BOILING BELOW THE INITIAL BOILING POINT OF SAID FEED, AND (4) AT LEAST ONE NORMALLY GASEOUS FRACTION, AND RECOVERING SAID NORMALLY LIQUID LUBRICATING OIL PRODUCT FRACTION AS A NET PRODUCT HAVING A POUR POINT BELOW 0*F. WITHOUT DEWAXING.