US4648958A — Process for producing a high quality lube oil sto…

Claim 1

Independent Claim 248 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 a molecular sieve containing pores defined by 10-membered rings of oxygen atoms and is 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 of the ZSM-5 type; (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 a crystalline aluminosilicate Y zeolite having activity for cracking hydrocarbons and a porous refractory oxide 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 2

Dependent Claim 248 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 a molecular sieve containing pores defined by 10-membered rings of oxygen atoms and is 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 of the ZSM-5 type; (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 a crystalline aluminosilicate Y zeolite having activity for cracking hydrocarbons and a porous refractory oxide 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 3

Dependent Claim 27 words

A process as defined by claim 1 wherein said hydrotreating catalyst comprises a Group VIB metal component and Group VIII metal component on a refractory oxide support.

Claim 4

Dependent Claim 43 words

A process as defined by claim 1 wherein said crystalline aluminosilicate Y zeolite comprises a Y zeolite having a water adsorption capacity, at 4.6 mm Hg. water vapor partial pressure and 25° C., less than about 8 percent by weight of said zeolite.

Claim 5

Dependent Claim 27 words

A process as defined by claim 1 wherein said crystalline aluminosilicate Y zeolite comprises a Y zeolite that has been ion-exchanged with ammonium ions and then steam-stabilized.

Claim 6

Dependent Claim 17 words

A process as defined by claim 1 wherein said waxy hydrocarbon feedstock comprises a dearsenated shale oil.

Claim 7

Dependent Claim 24 words

A process as defined by claim 1 wherein said hydrodewaxing catalyst further comprises a Group VIB metal component and a Group VIII metal component.

Claim 8

Dependent Claim 44 words

A process as defined by claim 1 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 9

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 10

Dependent Claim 16 words

A process as defined by claim 1 wherein said crystalline aluminosilicate Y zeolite comprises LZ-10 zeolite.

Claim 11

Dependent Claim 180 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 at least a portion of 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 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 support comprising a crystalline aluminosilicate Y zeolite having catalytic activity for cracking hydrocarbons and a porous refractory oxide comprising silica-alumina dispersed in a matrix of gamma alumina; and (c) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 12

Dependent Claim 180 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 at least a portion of 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 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 support comprising a crystalline aluminosilicate Y zeolite having catalytic activity for cracking hydrocarbons and a porous refractory oxide comprising silica-alumina dispersed in a matrix of gamma alumina; and (c) recovering a high quality lube oil stock from the effluent of said hydrocracking zone.

Claim 13

Dependent Claim 33 words

A process as defined by claim 10 wherein said dewaxing catalyst comprises a mixture of a porous refractory oxide and a crystalline aluminum phosphate containing pores defined by 10-membered rings of oxygen atoms.

Claim 14

Dependent Claim 33 words

A process as defined by claim 11 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 15

Dependent Claim 26 words

A process as defined by claim 12 wherein a Group VIB metal hydrogenation component and a Group VIII metal hydrogenation component are supported on said mixture.

Claim 16

Dependent Claim 37 words

A process as defined by claim 10 wherein the effluent from said dewaxing zone is treated to remove ammonia, hydrogen sulfide and light hydrocarbon gases prior to contacting said effluent with molecular hydrogen in said hydrocracking zone.

Claim 17

Dependent Claim 25 words

A process as defined by claim 10 wherein said hydrocracking catalyst contains a Group VIB metal hydrogenation component and a Group VIII metal hydrogenation component.

Claim 18

Dependent Claim 42 words

A process as defined by claim 10 wherein said zeolite comprises a crystalline aluminosilicate Y zeolite having a water adsorption capacity, at 4.6 mm Hg. Water vapor partial pressure and 25° C., less than about 8 percent by weight of said zeolite.

Claim 19

Dependent Claim 36 words

A process as defined by claim 10 wherein the effluent from said dewaxing zone is treated to remove liquids boiling below about 650° F. prior to contacting said effluent with molecular hydrogen in said hydrocracking zone.

Claim 20

Dependent Claim 21 words

A process as defined by claim 10 wherein said waxy hydrocarbon feedstock is contacted with molecular hydrogen in said dewaxing zone.

Claim 21

Dependent Claim 16 words

A process as defined by claim 10 wherein said crystalline aluminosilicate Y zeolite comprises LZ-10 zeolite.

Claim 22

Dependent Claim 27 words

A process as defined by claim 10 wherein said waxy hydrocarbon feedstock comprises a dearsenated shale oil which has been hydrotreated to remove organonitrogen and organosulfur components.

Claim 23

Dependent Claim 24 words

A process as defined by claim 10 wherein said dewaxing catalyst comprises a mixture of a porous refractory oxide and a crystalline silica polymorph.

Claim 24

Dependent Claim 33 words

A process as defined by claim 21 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 25

Dependent Claim 26 words

A process as defined by claim 22 wherein a Group VIB metal hydrogenation component and a Group VIIi metal hydrogenation component are supported on said mixture.

Claim 26

Dependent Claim 37 words

A process as defined by claim 23 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 27

Dependent Claim 13 words

A process as defined by claim 21 wherein said silica polymorph comprises silicalite.

Claim 28

Dependent Claim 28 words

A process as defined by claim 10 wherein said dewaxing catalyst comprises an intimate mixture of a porous refractory oxide and a crystalline zeolite of the ZSM-5 type.

Claim 29

Dependent Claim 34 words

A process as defined by claim 26 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 30

Dependent Claim 28 words

A process as defined by claim 26 wherein said zeolite of the ZSM-5 type is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35 and ZSM-38.

Claim 31

Dependent Claim 27 words

A process as defined by claim 27 wherein a Group VIB metal hydrogenation component and a Group VIII metal hydrogenation component are supported on said intimate mixture.

Claim 32

Dependent Claim 35 words

A process as defined by claim 29 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 33

Dependent Claim 36 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 a cobalt component.

Claim 34

Dependent Claim 21 words

A process as defined by claim 10 wherein said dewaxing zone and said hydrocracking zone are maintained in the same reactor.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-03-09	1990-09-08	1991-03-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-03-09	1994-09-08	1995-03-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-03-09	1998-09-08	1999-03-10	$7700.00	Window Closed / Lapsed

Process for producing a high quality lube oil stock

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