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US 5,292,426 AGranted
Wax conversion process
AssigneeTexaco Inc.
InventorsJohn B. Holland, Gerald F. Prescott, Dann G. Roy, Avilino Sequeira, Jr., James R. Whiteman
Life of this patent
Estimating the term…
Abstract
Hydrocarbon lube boiling range stock of high Pour Point may be catalytically hydrotreated to yield a product of high viscosity index and reduced Pour Point which is suitable as a lube base oil.
Claims18
The process for converting a waxy hydrocarbon charge of high Pour Point and containing at least about 40 w % paraffins to a hydrocarbon lube oil base stock product, of reduced Pour Point and high viscosity index, which comprises
- maintaining a bed of sulfur-tolerant catalyst, on a support of silica, alumina, silica-alumina, magnesia, or magnesia-alumina, containing 2-10 2 % non-noble Group VIII metal, 5-30 w % Group VI B metal, 0-2 w % phosphorus and 0-10 w % of halogen characterized by a Total Surface Area of 100-250 m.sup.2 /g and a pore size distribution as follows:
- ______________________________________ Pore Size Pore Volume cc/g ______________________________________ <100 .ANG. 0.20-0.50 100-160 .ANG. 0.01-0.05 >160 .ANG. 0.01-0.10 ______________________________________
- and a Pore Mode of 60.ANG.-100.ANG. diameter;
- passing waxy hydrocarbon charge of high Pour Point and containing at least 100 wppm sulfur and at least about 40 w % paraffins to said bed of catalyst;
- maintaining said bed of catalyst at wax conversion conditions including temperature of 550.degree. F.-900.degree. F., pressure of 300-5000 psig, space velocity LHSV of 0.1-10, and hydrogen feed rate of 500-10,000 SCFB thereby converting said waxy hydrocarbon charge of high Pour Point and containing at least about 100 wppm sulfur and at least about 40 w % paraffins to a hydrocarbon lube oil base stock product, of reduced Pour Point and high viscosity index;
- and
- recovering said hydrocarbon lube oil base stock product of reduced Pour Point and high viscosity index.
4 more elements
The process for converting a waxy hydrocarbon charge of high Pour Point and containing at least about 40 w % paraffins to a hydrocarbon lube oil base stock product, of reduced Pour Point and high viscosity index which comprises
- maintaining a first and a second bed of sulfur-tolerant catalyst, on a support of silica, alumina, silica-alumina, magnesia, or magnesia-alumina, containing 2-10 w % non-noble Group VIII metal, 5-30 w % Group VI B metal, 0-2 w % phosphorus and 0-10 w % of halogen characterized by a Total Surface Area of 100-250 m.sup.2 /g and a pore size distribution as follows:
- ______________________________________ Pore Size Pore Volume cc/g ______________________________________ <100.ANG. 0.20-0.50 100-160.ANG. 0.01-0.05 >160.ANG. 0.01-0.10 ______________________________________
- and a Pore Mode of 60.ANG.-90.ANG. diameter;
- passing waxy hydrocarbon charge of high Pour Point and containing at least 100 wppm sulfur and at least about 40 w % paraffins to said first bed of catalyst;
- maintaining said first bed of catalyst at wax conversion conditions including temperature of 550.degree. F.-900.degree. F., pressure of 300-5000 psig, space velocity LHSV of 0.1-10, and hydrogen feed rate of 500-10,000 SCFB thereby converting said waxy hydrocarbon charge of high Pour Point and containing at least about 40 w % paraffins to a first hydrocarbon lube oil base stock product, of reduced Pour Point and high viscosity index;
- recovering said first hydrocarbon lube oil base stock product of reduced Pour Point and high viscosity index;
- passing said first hydrocarbon product to said second bed of catalyst;
- maintaining said second bed of catalyst at temperature 100.degree. F.-300.degree. F. lower than the temperature of said first bed, at pressure of 300-5000 psig, space velocity LHSV o 0.1-10, and hydrogen feed rate of 5,000-10,000 SCFB thereby converting said first hydrocarbon product to a second hydrocarbon product particularly characterized by improved stability to ultraviolet light;
- and
- recovering said second hydrocarbon product.
7 more elements
The process for converting a waxy hydrocarbon charge of high Pour Point and containing at least about 40 w % paraffins to a hydrocarbon lube oil base stock product, of reduced Pour Point and high viscosity index which comprises
- maintaining a bed of sulfur-tolerant catalyst, on a support of silica, alumina, silica-alumina, magnesia, or magnesia-alumina, containing 2-10 w % non-noble Group VIII metal, 5-30 w % Group VI B metal, 0-2 w % phosphorus and 0.5-10 w % of halogen characterized by a Total Surface Area of 100-250 m.sup.2 /g and a pore size distribution as follows:
- ______________________________________ Pore Size Pore Volume cc/g ______________________________________ <100.ANG. 0.20-0.50 100-160.ANG. 0.01-0.05 >160.ANG. 0.01-0.10 ______________________________________
- and a Pore Mode of 60.ANG.-100.ANG. diameter;
- passing waxy hydrocarbon charge of high Pour Point and containing at least 100 wppm sulfur and at least about 40 w % paraffins to said bed of catalyst;
- maintaining said bed of catalyst at wax conversion conditions including temperature of 550.degree. F. -900.degree. F., pressure of 300-5000 psig, space velocity LHSV of 0.1-10, and hydrogen feed rate of 500-10,000 SCFB thereby converting said waxy hydrocarbon charge of high Pour Point and containing at least about 100 wppm sulfur and at least about 40 w % paraffins to a hydrocarbon lube oil base stock product, of reduced Pour Point and high viscosity index;
- and
- recovering said hydrocarbon lube oil base stock product of reduced Pour Point and high viscosity index.
4 more elements
Dependencies are inferred from the claim text.