Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1988-11-10
1990-04-17
McFarlane, Anthony
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
208 18, 208 67, 208 85, 208 86, 208 87, 208 88, 208106, 208107, 208120, C10G 5304, C10G 5504, C10G 5700
Patent
active
049177885
ABSTRACT:
This invention provides a method for extending the catalytic dewaxing cycle time of a refined waxy lube stock. The method, in its broadest aspect, requires the additional refining step of thermally treating the refined waxy stock or precursor thereof for about 0.1 to about 2.0 hours at elevated temperature and at a pressure of 0 to 3000 psig (pounds per square inch gauge), and recovering an upgraded waxy stock having a reduced content of trace compounds that contain metals, nitrogen, sulfur and oxygen.
In a specific embodiment of this invention, a vacuum residuum is thermally treated at a temperature of about 700.degree. F. to 950.degree. F. prior to solvent deasphalting and solvent extraction, and the waxy bright stock so formed is catalytically dewaxed with extended cycle time.
REFERENCES:
patent: 2895902 (1959-07-01), Peet
patent: 3303126 (1967-02-01), Gleim
patent: 3779896 (1973-12-01), Woodle
patent: 3796653 (1974-03-01), Gatsis
patent: 4138227 (1979-02-01), Wilson et al.
patent: 4181598 (1980-01-01), Gillespie et al.
patent: 4357232 (1982-11-01), Holland et al.
patent: 4358363 (1982-11-01), Smith
patent: 4361477 (1982-11-01), Miller
patent: 4390410 (1983-06-01), Audeh
patent: 4437975 (1984-03-01), Gillespie
patent: 4446007 (1984-05-01), Smith
patent: 4448673 (1984-05-01), Shihabi
patent: 4490242 (1984-12-01), Oleck et al.
patent: 4593135 (1986-06-01), Gregory
patent: 4599162 (1986-07-01), Yen
patent: 4678556 (1987-07-01), Hicks et al.
G. Rahbe et al., "Non-Catalytic Hydrodemetallization of Boscan Crude", J. Jaxan Petrol. Inst., 21, (2), 101-109 (1978).
Rankel Lillian A.
Whitehurst Darrell D.
Keen Malcolm D.
McFarlane Anthony
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
LandOfFree
Manufacture of lube base stocks does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manufacture of lube base stocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacture of lube base stocks will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1050565