Process for the preparation of lubricating oils

Claim 2

A PROCESS FOOR THE PREPARATION OF LUBRICATING OILS OF ENHANCED STABILITY COMPRISING: I. HYDROCRACKING A LIQUID HYDROCARBON OIL FEEDSTOCK, THE PREDOMINANT PORTION OF WHICH EXHIBITS AN INITIAL BOILING POINT ABOVE ABOUT 650*F OVER A HYDROCRACKING A CATALYST UNDER HYDROCRACKING CONDITIONS TO PRODUCE A HYDROCRACKATE, II. FRACTIONATING SAID RESULTING HYDROCRACKATE TO FORM AT LEAST TWO LUBRICATING OIL FRACTIONS, AND III. HYDROGENATING EACH OF SAID FRACTION OVER A HYDROGENATION CATALYST CONSISTING OF GROUP VIII METALS, SAID GROUP VIII METALS BEING SUPPORTED ON A CARRIER, SAID HYDROGNATING BEING CARRIER OUT UNDER CONDITIONS SO AS TO OBTAIN A PRODUCT HAVING AN AROMATICS CONTENT OF BELOW ABOUT 1% BY WEIGHT.

Claim 3

Process as defined in claim 1 wherein the hydrocrackate is de-waxed prior to fractionation.

Claim 4

Process as defined in claim 1 wherein the lubricating oil fractions are each de-waxed prior to hydrogenation.

Claim 5

Process as defined in claim 1 wherein the lubricating oil fractions are de-waxed after hydrogenation.

Claim 6

Process as defined in claim 1 wherein the hydrocracking catalyst comprises oxides and/or sulfides of molybdenum and/or tungsten on a porous non-zeolitic support.

Claim 7

Process as defined in claim 1 wherein said Group VIII metal is nickel.

Claim 8

Process as defined in claim 1 wherein the hydrocracking catalyst comprises (1) from 10 to 70 wt. % of a crystalline aluminosilicate having a silica/alumina mole ratio greater than about 2.5, upon which is deposited or base exchanged, from about 0.05 to 50 wt. % based on the aluminosilicate, of a transition metal hydrogenation component; and (2) from 30 to 90 wt. % of a porous, substantially inert, thermally stable inorganic adjuvant upon which is deposited a minor proportion of a transition metal hydrogenation component.

Claim 9

Process as defined in claim 1 wherein the hydrocracking catalyst compress (1) from 10 to 30 wt. % of a crystalline aluminosilicate having a silica/alumina ratio of from 3 to 6, upon which is deposited or base exchanged from 0.1 to 25 wt. % based on the aluminosilicate, of a transition metal hydrogenation component; and (2 ) from 70 to 90 wt. % of a porous, substantially inert, thermally stable inorganic adjuvant upon which is deposited a minor proportion of a transition metal hydrogenation component.

Claim 10

Process as defined in claim 1 wherein hydrocracking is conducted at temperatures varying from about 550.degree. to about 850.degree.F.; pressures varying from about 500 to about 4,000 psig.; liquid hourly space velocities varying from about 0.2 to 10 and hydrogen/hydrocarbon ratios varying from about 1 to about 15 M.s.c.f./b.

Claim 11

Process as defined in claim 1 wherein the hydrogenation is conducted at temperatures varying from about 350.degree. to about 600.degree.F.; pressures varying from about 400 to about 3,000 psig.; and liquid hourly space velocities varying between about 0.1 and 2.

Claim 12

A process for the preparation of lubricating oils of enhanced stability comprising: i. hydrocracking a liquid hydrocarbon oil feedstock the predominant portion of which exhibits an initial boiling point above about 650.degree.F. over a hydrocracking catalyst comprising (1) from 10 to 30 weight % of a crystalline aluminosilicate having a silica/alumina ratio of from 3 to 6, upon which is deposited or base exchanged from 0.1 to 25 weight %, based on aluminosilicate, of a transition metal hydrogenation catalyst, and (2) from 70 to 90 weight % of a porous, substantially inert, thermally stable inorganic adjuvant upon which is deposited a minor proportion of a transition metal hydrogenation component to produce a hydrocrackate; ii. fractionating said resulting hydrocrackate to form at least two lubricating oil fractions; iii. dewaxing each of said lubricating oil fractions; and iv. hydrogenating each of said dewaxed lubricating oil fractions over a hydrogenation catalyst consisting of nickel on a kieselguhr support at a temperature ranging from about 350.degree. to about 600.degree.F., at a pressure from about 400 to about 3,000 psig and a space velocity of between about 0.1 and 2 so as to reduce the aromatics content of each of said fractions to below about 1% by weight.

Claim 13

A process for the preparation of lubricating oils of enhanced stability comprising: i. hydrocracking a liquid hydrocarbon oil feedstock the predominant portion of which exhibits an initial boiling point above about 650.degree.F. over a hydrocracking catalyst comprising (1) from 10 to 30 weight % of a crystalline aluminosilicate having a silica/alumina ratio of from 3 to 6, upon which is deposited or base exchanged from 0.1 to 25 weight %, based on aluminosilicate, of a transition metal hydrogenation catalyst, and (2) from 70 to 90 weight % of a porous, substantially inert, thermally stable inorganic adjuvant upon which is deposited a minor proportion of a transition metal hydrogenation component to produce a hydrocrackate; ii. fractionating said resulting hydrocrackate to form at least two lubricating oil fractions; iii. dewaxing each of said lubricating oil fractions; and iv. hydrogenating each of said dewaxed lubricating oil fractions over a hydrogenation catalyst consisting of nickel on a kieselguhr support at a temperature ranging from about 350.degree. to about 600.degree.F., at a pressure from about 400 to about 3,000 psig and a space velocity of between about 0.1 and 2 so as to reduce the aromatics content of each of said fractions to below about 1% by weight.