US3870622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of a hydrocracked lubricating oil
Assignee: Texaco Inc
•
Filing: 1973-06-25
•
Granted: 1975-03-11
•
Expires: 1993-06-25
Abstract
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.
Inventors
- 👤 William B Ashton
- 👤 Luis A Gonzalez
- 👤 Gerald V Nelson
- 👤 Theodore C Mead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:10
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/12; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
198 words
A METHOD OF TREATING A HYDROCRACKED LUBRICATING OIL STOCK HAVING AN INITIAL BOILING POINT OF ABOUT 600*F, AND HAVING AN END POINT IN THE RANGE OF FROM ABOUT 950*F TO ABOUT 1,100*F, AND CONTAINING A SUBSTANTIAL PORTION OF MONONUCLEAR AND DINUCLEAR AROMATIC COMPOUNDS, FOR INCREASING, THE VISOCOSITY INDEX THEREOF, WHICH METHOD COMPRISES: A. FRACTIONATING THE HYDROCRACKED LUBRICATING OIL STOCKING INTO A LIGHT FRACTION BOILING IN THE RANGE OF ABOUT 600*F TO ABOUT 750*F, AND A HEAVY FRACTION HAVING AN INTIAL BOILING POINT OF ABOUT 750*F; B. HYDROGENATING THE LIGHT FRACTION AT A TEMPERATURE OF FROM ABOUT 600*F TO ABOUT 725*F, A PRESSURE OF FROM ABOUT 1,000 TO ABOUT 10,000 PSIG, A LIQUID HOURLY SPACE VELOCITY OF FROM ABOUT 0.1 TO ABOUT 3.0 VOLUMES LIGHT FRACTION PER HOUR PER VOLUME OF CATALYST WITH FROM ABOUT 500 TO ABOUT 30,000 STANDARD CUBIC FEET OF HYDROGEN PER BARREL OF LIGHT FRACTION IN THE PRESENCE OF A HYDROGENATION CATALYST FOR SATURATION OF MONO-NUCLEAR AND DI-NUCLEAR AROMATICS HYDROCARBONS; C. REBLENDING THE HYDROGENATED LIGHT FRACTION AND THE HEAVY FRACTION; AND D. SEPARATING LOW BOILING CRACKED HYDROCARBON FROM THE REBLENDED LUBRICATING OIL OF STEP (C) FOR ADJUSTMENT OF THE INITIAL BOILING POINT TO ABOUT 600*F.
Claim 2
Independent Claim
198 words
A METHOD OF TREATING A HYDROCRACKED LUBRICATING OIL STOCK HAVING AN INITIAL BOILING POINT OF ABOUT 600*F, AND HAVING AN END POINT IN THE RANGE OF FROM ABOUT 950*F TO ABOUT 1,100*F, AND CONTAINING A SUBSTANTIAL PORTION OF MONONUCLEAR AND DINUCLEAR AROMATIC COMPOUNDS, FOR INCREASING, THE VISOCOSITY INDEX THEREOF, WHICH METHOD COMPRISES: A. FRACTIONATING THE HYDROCRACKED LUBRICATING OIL STOCKING INTO A LIGHT FRACTION BOILING IN THE RANGE OF ABOUT 600*F TO ABOUT 750*F, AND A HEAVY FRACTION HAVING AN INTIAL BOILING POINT OF ABOUT 750*F; B. HYDROGENATING THE LIGHT FRACTION AT A TEMPERATURE OF FROM ABOUT 600*F TO ABOUT 725*F, A PRESSURE OF FROM ABOUT 1,000 TO ABOUT 10,000 PSIG, A LIQUID HOURLY SPACE VELOCITY OF FROM ABOUT 0.1 TO ABOUT 3.0 VOLUMES LIGHT FRACTION PER HOUR PER VOLUME OF CATALYST WITH FROM ABOUT 500 TO ABOUT 30,000 STANDARD CUBIC FEET OF HYDROGEN PER BARREL OF LIGHT FRACTION IN THE PRESENCE OF A HYDROGENATION CATALYST FOR SATURATION OF MONO-NUCLEAR AND DI-NUCLEAR AROMATICS HYDROCARBONS; C. REBLENDING THE HYDROGENATED LIGHT FRACTION AND THE HEAVY FRACTION; AND D. SEPARATING LOW BOILING CRACKED HYDROCARBON FROM THE REBLENDED LUBRICATING OIL OF STEP (C) FOR ADJUSTMENT OF THE INITIAL BOILING POINT TO ABOUT 600*F.
Claim 3
Independent Claim
198 words
A method of treating a hydrocracked lubricating oil stock having an initial boiling point of about 600*F, and having an end point in the range of from about 950*F to about 1,100*F, and containing a substantial portion of mononuclear and di-nuclear aromatic compounds, for increasing, the viscosity index thereof, which method comprises: a. fractionating the hydrocracked lubricating oil stock into a light fraction boiling in the range of about 600*F to about 750*F, and a heavy fraction having an initial boiling point of about 750*F; b. hydrogenating the light fraction at a temperature of from about 600*F to about 725*F, a pressure of from about 1,000 to about 10,000 psig, a liquid hourly space velocity of from about 0.1 to about 3.0 volumes light fraction per hour per volume of catalyst with from about 500 to about 30,000 standard cubic feet of hydrogen per barrel of light fraction in the presence of a hydrogenation catalyst for saturation of mono-nuclear and di-nuclear aromatics hydrocarbons; c. reblending the hydrogenated light fraction and the heavy fraction; and d. separating low boiling cracked hydrocarbon from the reblended lubricating oil of step (c) for adjustment of the initial boiling point to about 600*F.
Claim 4
Independent Claim
198 words
A method of treating a hydrocracked lubricating oil stock having an initial boiling point of about 600*F, and having an end point in the range of from about 950*F to about 1,100*F, and containing a substantial portion of mononuclear and di-nuclear aromatic compounds, for increasing, the viscosity index thereof, which method comprises: a. fractionating the hydrocracked lubricating oil stock into a light fraction boiling in the range of about 600*F to about 750*F, and a heavy fraction having an initial boiling point of about 750*F; b. hydrogenating the light fraction at a temperature of from about 600*F to about 725*F, a pressure of from about 1,000 to about 10,000 psig, a liquid hourly space velocity of from about 0.1 to about 3.0 volumes light fraction per hour per volume of catalyst with from about 500 to about 30,000 standard cubic feet of hydrogen per barrel of light fraction in the presence of a hydrogenation catalyst for saturation of mono-nuclear and di-nuclear aromatics hydrocarbons; c. reblending the hydrogenated light fraction and the heavy fraction; and d. separating low boiling cracked hydrocarbon from the reblended lubricating oil of step (c) for adjustment of the initial boiling point to about 600*F.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein the catalyst is selected from the group consisting of chromium, tungsten, cobalt, molybdenum, nickel, their oxides, their sulfides, platinum, palladium, rhodium, irridium, ruthenium and combinations thereof.
Claim 6
Dependent Claim
18 words
The method of claim 2 wherein the hydrogenation catalyst is supported upon a porous, noncracking inorganic oxide base.
Claim 7
Dependent Claim
19 words
The method of claim 3 wherein the base is selected from the group consisting of silica-alumina, alumina, and kieselguhr.
Claim 8
Dependent Claim
16 words
The method of claim 4 wherein the hydrogenation catalyst comprises nickel and tungsten supported upon alumina.
Claim 9
Dependent Claim
16 words
The method of claim 4 wherein the hydrogenation catalyst comprises cobalt and molybdenum supported upon aluMina.
Claim 10
Dependent Claim
74 words
The method of claim 2 wherein the light fraction is hydrogenated at a temperature of from about 650*F to about 700*F, a pressure of from about 1,500 psig to about 3,000 psig, a liquid hourly space velocity of from about 0.25 to about 1.5 volumes of oil per volume of catalyst per hour, and a hydrogen rate of from about 5,000 to about 20,000 standard cubic feet of hydrogen per barrel of light fraction.
Claim 11
Dependent Claim
47 words
The method of claim 7 wherein the hydrocracked lubricating oil stock is separated into a light fraction having an initial boiling point of about 600*F and an end point of about 725*F and a heavy fraction having an initial boiling point of about 725*F by fractional distillation.
Claim 12
Dependent Claim
48 words
The method of claim 8 wherein the initial boiling point temperature of the reblended oil is adjusted to about 600*F by vaporizing low boiling cracked hydrocarbons from the liquid reblended oil at an elevated temperature of about 340*F and a subatmospheric pressure of about 3 millimeters mercury, absolute.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |