US4743355A — Process for producing a high quality lube oil sto…

Claim 1

Independent Claim 159 words

A process for converting a waxy hydrocarbon feedstock containing a substantial proportion of hydrocarbonaceous material boiling above about 650° F. into a high quality lube oil stock which comprises: (a) contacting said waxy hydrocarbon feedstock with a dewaxing catalyst in a dewaxing zone under conditions such that the pour point of said feedstock is reduced, said dewaxing catalyst comprising a molecular sieve containing pores defined by 10-membered rings of oxygen atoms; (b) contacting the effluent from said dewaxing zone with molecular hydrogen in the presence of a hydrocracking catalyst in a hydrocracking zone under conditions such that a further reduction in pour point is effected, wherein said contacting in steps (a) and (b) is such that the overall conversion of components boiling above about 650° F. to components boiling at or below about 650° F. is no more than about 20 volume percent; and (c) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 2

Dependent Claim 159 words

A process for converting a waxy hydrocarbon feedstock containing a substantial proportion of hydrocarbonaceous material boiling above about 650° F. into a high quality lube oil stock which comprises: (a) contacting said waxy hydrocarbon feedstock with a dewaxing catalyst in a dewaxing zone under conditions such that the pour point of said feedstock is reduced, said dewaxing catalyst comprising a molecular sieve containing pores defined by 10-membered rings of oxygen atoms; (b) contacting the effluent from said dewaxing zone with molecular hydrogen in the presence of a hydrocracking catalyst in a hydrocracking zone under conditions such that a further reduction in pour point is effected, wherein said contacting in steps (a) and (b) is such that the overall conversion of components boiling above about 650° F. to components boiling at or below about 650° F. is no more than about 20 volume percent; and (c) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 3

Dependent Claim 27 words

A process as defined by claim 1 wherein said waxy hydrocarbon feedstock comprises a dearsenated shale oil which has been hydrotreated to remove organonitrogen and organosulfur components.

Claim 4

Dependent Claim 24 words

A process as defined by claim 1 wherein said dewaxing catalyst comprises a mixture of a porous refractory oxide and a crystalline silica polymorph.

Claim 5

Dependent Claim 33 words

A process as defined by claim 3 wherein at least one hydrogenation component selected from the group consisting of Group VIB metal components and Group VIII metal components is supported on said mixture.

Claim 6

Dependent Claim 26 words

A process as defined by claim 4 wherein a Group VIB metal hydrogenation component and a Group VIII metal hydrogenation component are supported on said mixture.

Claim 7

Dependent Claim 37 words

A process as defined by claim 5 wherein said Group VIB metal hydrogenation component comprises a tungsten component or a molybdenum component and said Group VIII metal hydrogenation component comprises a nickel component or a cobalt component.

Claim 8

Dependent Claim 14 words

A process as defined by claim 3 wherein said porous refractory oxide comprises alumina.

Claim 9

Dependent Claim 13 words

A process as defined by claim 3 wherein said silica polymorph comprises silicalite.

Claim 10

Dependent Claim 46 words

A process as defined by claim 1 wherein said hydrocracking catalyst comprises at least one hydrogenation component selected from the group consisting of Group VIB metal components and Group VIII metal components on a refractory oxide support comprising silica-alumina dispersed in a matrix of gamma alumina.

Claim 11

Dependent Claim 25 words

A process as defined by claim 9 wherein said hydrocracking catalyst contains a Group VIB metal hydrogenation component and a Group VIII metal hydrogenation component

Claim 12

Dependent Claim 35 words

A process as defined by claim 10 wherein said Group VIB metal hydrogenation component comprises a tungsten component or molybdenum component and said Group VIII metal hydrogenation component comprises a nickel component or cobalt component.

Claim 13

Dependent Claim 29 words

A process as defined by claim 1 wherein said dewaxing catalyst comprises an intimate mixture of a porous refractory oxide and a crystalline zeolite having a ZSM-5 structure zeolite.

Claim 14

Dependent Claim 34 words

A process as defined by claim 12 wherein at least one hydrogenation component selected from the group consisting of Group VIB metal components and Group VIII metal components is supported on said intimate mixture.

Claim 15

Dependent Claim 29 words

A process as defined by claim 12 wherein said zeolite having a ZSM-5 zeolite structure is selected from a group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35 and ZSM-38.

Claim 16

Dependent Claim 27 words

A process as defined by claim 13 wherein a Group VIB metal hydrogenation component and a Group VIII metal hydrogenation component are supported on said intimate mixture.

Claim 17

Dependent Claim 35 words

A process as defined by claim 15 wherein said Group VIB metal hydrogenation component comprises a tungsten component or molybdenum component and said Group VIII metal hydrogenation component comprises a nickel component or cobalt component.

Claim 18

Dependent Claim 21 words

A process as defined by claim 1 wherein said dewaxing zone and said hydrocracking zone are maintained in the same reactor.

Claim 19

Dependent Claim 44 words

A process as defined by claim 1 wherein the effluent from said hydrodewaxing zone is treated to remove liquids boiling below about 650° F., ammonia, hydrogen sulfide and light hydrocarbon gases, and the remaining portion of said effluent is passed to said hydrocracking zone.

Claim 20

Dependent Claim 36 words

A process as defined by claim 1 wherein said overall conversion of components boiling above about 650° F. to components boiling at or below about 650° F. is no more than about 10 percent by volume.

Claim 21

Dependent Claim 24 words

A process as defined by claim 1 wherein said dewaxing catalyst comprises a mixture of a porous refractory oxide and a crystalline aluminum phosphate.

Claim 22

Dependent Claim 24 words

A process as defined by claim 1 wherein said waxy hydrocarbon feedstock is contacted with said dewaxing catalyst in the presence of molecular hydrogen.

Claim 23

Dependent Claim 33 words

A process as defined by claim 1 wherein substantially all of the effluent from said dewaxing zone is contacted with molecular hydrogen in the presence of said hydrocracking catalyst in said hydrocracking zone.

Claim 24

Dependent Claim 243 words

A process for converting a waxy hydrocarbon feedstock into a high quality lube oil stock which comprises: (a) contacting said waxy hydrocarbon feedstock with molecular hydrogen in the presence of a hydrotreating catalyst in a hydrotreating zone under conditions such that the concentration of organosulfur and organonitrogen components is reduced; (b) contacting the effluent from said hydrotreating zone with molecular hydrogen in the presence of a hydrodewaxing catalyst in a hydrodewaxing zone under conditions such that the pour point of the hydrotreated feedstock from step (a) is reduced, wherein said hydrodewaxing catalyst comprises at least one hydrogenation component selected from the group consisting of a Group VIB metal component and a Group VIII metal component on a support selected from the group consisting of (1) a mixture of a porous refractory oxide and a crystalline silica polymorph and (2) a mixture of a porous refractory oxide and a crystalline zeolite having ZSM-5 zeolite structure. (c) contacting the effluent from said hydrodewaxing zone with molecular hydrogen in the presence of a hydrocracking catalyst in a hydrocracking zone under conditions such that a further reduction in pour point is effected, wherein said hydrocracking catalyst comprises at least one hydrogenation component selected from the group consisting of a Group VIB metal component and a Group VIII metal component on a support comprising silica-alumina dispersed in a matrix of gamma alumina; and (d) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 25

Dependent Claim 243 words

A process for converting a waxy hydrocarbon feedstock into a high quality lube oil stock which comprises: (a) contacting said waxy hydrocarbon feedstock with molecular hydrogen in the presence of a hydrotreating catalyst in a hydrotreating zone under conditions such that the concentration of organosulfur and organonitrogen components is reduced; (b) contacting the effluent from said hydrotreating zone with molecular hydrogen in the presence of a hydrodewaxing catalyst in a hydrodewaxing zone under conditions such that the pour point of the hydrotreated feedstock from step (a) is reduced, wherein said hydrodewaxing catalyst comprises at least one hydrogenation component selected from the group consisting of a Group VIB metal component and a Group VIII metal component on a support selected from the group consisting of (1) a mixture of a porous refractory oxide and a crystalline silica polymorph and (2) a mixture of a porous refractory oxide and a crystalline zeolite having ZSM-5 zeolite structure. (c) contacting the effluent from said hydrodewaxing zone with molecular hydrogen in the presence of a hydrocracking catalyst in a hydrocracking zone under conditions such that a further reduction in pour point is effected, wherein said hydrocracking catalyst comprises at least one hydrogenation component selected from the group consisting of a Group VIB metal component and a Group VIII metal component on a support comprising silica-alumina dispersed in a matrix of gamma alumina; and (d) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 26

Dependent Claim 27 words

A process as defined by claim 23 wherein said hydrotreating catalyst comprises a Group VIB metal component and Group VIII metal component on a refractory oxide support.

Claim 27

Dependent Claim 44 words

A process as defined by claim 23 wherein the effluent from said hydrotreating zone is treated to remove liquids boiling below about 650° F., ammonia, hydrogen sulfide, and light hydrocarbon gases, and the remaining portion of said effluent is passed to said hydrodewaxing zone.

Claim 28

Dependent Claim 44 words

A process as defined by claim 23 wherein the effluent from said hydrodewaxing zone is treated to remove liquidds boiling below about 650° F., ammonia, hydrogen sulfide, and light hydrocarbon gases, and the remaining portion of said effluent is passed to said hydrocracking zone.

Claim 29

Dependent Claim 222 words

A process for converting a waxy hydrocarbon feedstock containing a substantial proportion of hydrocarbonaceous material boiling above about 650° F. into a high quality lube oil stock which comprises: (a) contacting said waxy hydrocarbon feedstock with a dewaxing catalyst in a dewaxing zone under conditions such that an effluent having a pour point below the pour point of said feedstock is produced, said dewaxing catalyst comprising a molecular sieve containing pores defined by 10-membered rings of oxygen atoms; (b) using at least a portion of said effluent from said dewaxing zone as at least a portion of the feedstock to a hydrocracking zone by passing said effluent to said hydrocracking zone; (c) contacting said hydrocracking zone feedstock with molecular hydrogen in the presence of a hydrocracking catalyst in said hydrocracking zone under conditions such that the pour point of said hydrocracking zone feedstock is reduced, wherein said contacting in steps (a) and (c) is such that the overall conversion of components boiling above about 650° F. to components boiling at or below 650° F. is more than about 20 volume percent and wherein said hydrocracking zone feedstock has a final boiling point equal to or lower than the final boiling point of said waxy hydrocarbon feedstock; and (d) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 30

Dependent Claim 222 words

A process for converting a waxy hydrocarbon feedstock containing a substantial proportion of hydrocarbonaceous material boiling above about 650° F. into a high quality lube oil stock which comprises: (a) contacting said waxy hydrocarbon feedstock with a dewaxing catalyst in a dewaxing zone under conditions such that an effluent having a pour point below the pour point of said feedstock is produced, said dewaxing catalyst comprising a molecular sieve containing pores defined by 10-membered rings of oxygen atoms; (b) using at least a portion of said effluent from said dewaxing zone as at least a portion of the feedstock to a hydrocracking zone by passing said effluent to said hydrocracking zone; (c) contacting said hydrocracking zone feedstock with molecular hydrogen in the presence of a hydrocracking catalyst in said hydrocracking zone under conditions such that the pour point of said hydrocracking zone feedstock is reduced, wherein said contacting in steps (a) and (c) is such that the overall conversion of components boiling above about 650° F. to components boiling at or below 650° F. is more than about 20 volume percent and wherein said hydrocracking zone feedstock has a final boiling point equal to or lower than the final boiling point of said waxy hydrocarbon feedstock; and (d) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 31

Dependent Claim 24 words

A process as defined by claim 27 wherein said waxy hydrocarbon feedstock is contacted with said dewaxing catalyst in the presence of molecular hydrogen.

Claim 32

Dependent Claim 27 words

A process as defined by claim 27 wherein said waxy hydrocarbon feedstock comprises a dearsenated shale oil which has been hydrotreated to remove organonitrogen and organosulfur components.

Claim 33

Dependent Claim 24 words

A process as defined by claim 27 wherein said dewaxing catalyst comprises a mixture of a porous refractory oxide and a crystalline silica polymorph.

Claim 34

Dependent Claim 14 words

A process as defined by claim 30 wherein said crystalline silica polymorph comprises silicalite.

Claim 35

Dependent Claim 46 words

A process as defined by claim 27 wherein said hydrocracking catalyst comprises at least one hydrogenation component selected from the group consisting of Group VIB metal components and Group VIII metal components on a refractory oxide support comprising silica-alumina dispersed in a matrix of gamma alumina.

Claim 36

Dependent Claim 25 words

A process as defined by claim 32 wherein said hydrocracking catalyst contains a Group VIB metal hydrogenation component and a Group VIII metal hydrogenation component.

Claim 37

Dependent Claim 25 words

A process as defined by claim 27 wherein said dewaxing catalyst comprises a porous refractory oxide and a crystalline zeolite having a ZSM-5 zeolite structure.

Claim 38

Dependent Claim 33 words

A process as defined by claim 27 wherein the effluent from said dewaxing zone is treated to remove liquids boiling below about 650° F. prior to passing said effluent to said hydrocracking zone.

Claim 39

Dependent Claim 34 words

A process as defined by claim 27 wherein the effluent from said dewaxing zone is treated to remove ammonia, hydrogen sulfide and light hydrocarbon gases prior to passing said effluent to said hydrocracking zone.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-05-10	1991-11-09	1992-05-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-05-10	1995-11-09	1996-05-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-05-10	1999-11-09	2000-05-10	$7700.00	Window Closed / Lapsed

Process for producing a high quality lube oil stock

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag