Mineral oils: processes and products – Products and compositions – Lubricating oils
Reexamination Certificate
2008-03-25
2008-03-25
McAvoy, Ellen M. (Department: 1764)
Mineral oils: processes and products
Products and compositions
Lubricating oils
C208S019000, C208S027000, C208S092000, C208S097000
Reexamination Certificate
active
07347928
ABSTRACT:
A process to prepare a spindle oil, light machine oil and a medium machine oil base oil grade by:(a) performing a separate catalytic dewaxing on a spindle oil fraction, a light machine oil fraction and a medium machine oil fraction as obtained in a vacuum distillation of a bottoms fraction of a fuels hydrocracking process;(b) performing a separate hydrofinishing of the light and medium machine oil fractions obtained in step (a);(c) separating the low boiling compounds from the spindle oil, light machine oil and medium machine oil fractions as obtained in step (a) and (b) and obtaining the spindle oil, light machine oil and medium machine oil base oil grade;(d) wherein the vacuum distillation is performed by altematingly performing the distillation in two modes wherein the first mode (d1) the bottoms fraction is separated into a gas oil fraction, a spindle oil fraction, a medium machine oil fraction and a first rest fraction boiling between said spindle oil and medium machine oil fraction and in the second mode(d2) the bottoms fraction is separated into a gas oil fraction, a spindle oil fraction, a light machine oil fraction and a second rest fraction boiling above the light machine oil fraction.
REFERENCES:
patent: 3663422 (1972-05-01), Dun et al.
patent: 3902988 (1975-09-01), Bennett et al.
patent: 4181598 (1980-01-01), Gillespie et al.
patent: 4574043 (1986-03-01), Chester et al.
patent: 4695365 (1987-09-01), Ackelson et al.
patent: 4851109 (1989-07-01), Chen et al.
patent: 4859311 (1989-08-01), Miller
patent: 4990238 (1991-02-01), Cruzan et al.
patent: 5053373 (1991-10-01), Zones
patent: 5157191 (1992-10-01), Bowes et al.
patent: 5252527 (1993-10-01), Zones
patent: 5306416 (1994-04-01), Le et al.
patent: 5378351 (1995-01-01), Guichard et al.
patent: 5580442 (1996-12-01), Kwon et al.
patent: 5877130 (1999-03-01), Kohara et al.
patent: 6099719 (2000-08-01), Cody et al.
patent: 6264826 (2001-07-01), Xiao et al.
patent: 6872693 (2005-03-01), Cain
patent: 19941091152 (1994-08-01), None
patent: 0649896 (1996-06-01), None
patent: 0712922 (1996-10-01), None
patent: 0699225 (1999-02-01), None
patent: 0832171 (2000-01-01), None
patent: 0705321 (2000-03-01), None
patent: 0 994 173 (2000-04-01), None
patent: 1352040 (2005-08-01), None
patent: 2182637 (1973-12-01), None
patent: 1390953 (1975-04-01), None
patent: WO198901506 (1989-02-01), None
patent: 94/10263 (1994-05-01), None
patent: WO199426848 (1994-11-01), None
patent: WO199500604 (1995-01-01), None
patent: 97/18278 (1997-05-01), None
patent: 00/29511 (2000-05-01), None
patent: WO200029512 (2000-05-01), None
A. Hennico. et al. . “IFP's New Flexible Hydrocracking Process Combines Maximum Conversion with Production of High Viscosity. High VI Lube Stocks”. Revue De L-Institut Francais Du Petroie. vol. 48. N 2. Mars-Avril 1993, pp. 127-139.
Zakatarian, J. A. et al., “All-Hydroprocessing Route for High VI-Lubes”, Energy Process, vol. 7, 1987, pp. 59-64: Presentation at AIChe Spring National Meeting, New Orleans, Apr. 6-10, 1986.
Farell, T. R. and Zakarian, J. A., “Lube Facility Makes High-Quality Lube Oil From Low- Quality Feed” in Oil & Gas Journal, May 19, 1986.
Wilson, M. W. et al, Commercialization of Isodewaxing - A New Technology for Dewaxing to Manufacture High Quality Lube Base Stocks, presented at 1994 NPRA. National Fuels and Lubricants Meeting, Nov. 3-4, 1994, Houston, Texas, together with Affidavit of Mr. Wilson.
Howell, R. L. et al, “Hydroprocessing Routes to Improved Base Oil Quality and Refining Economics”, paper presentation at Asia Fuels and Lubes Conference. Singapore, Jan. 2000, together with letter to Ms. Gaudiel dated Dec. 15, 1999.
Bridge, A. G. et al, “Isodewaxing - Improving Refining Economics” in Petroleum Technology Quarterly, Summer 1996, pp. 17-23.
Helton, T.E. et al, “Catalytic Hydroprocessing : A Good Alternative to Solvent Processing”, in Oil & Gas Journal, Jul. 20, 1998, pp. 58-67.
Geukema Arjen Peter
Polder Kevin John Anthony
van Beijnum Johannes
McAvoy Ellen M.
Shell Oil Company
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