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US4140626A
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Process for the selective desulfurization of cracked naphthas with magnesia-containing catalyst
Assignee: BP Corp North America Inc
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Filing: 1977-07-29
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Granted: 1979-02-20
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Expires: 1997-07-29
Abstract
Abstract The process comprises contacting a cracked naphtha in a reaction zone under hydrodesulfurization conditions and in the presence of hydrogen with a catalyst comprising a hydrogenation component comprising a Group VIB metal and a Group VIII metal deposited on a solid support comprising magnesium oxide. The catalyst support may also comprise a refractory inorganic oxide, such as alumina. In the latter case, the catalyst support should contain at least 70 wt.% magnesium oxide to furnish a satisfactory embodiment of the catalyst.
Inventors
- 👤 Ralph J. Bertolacini
- 👤 Trevelyan A. Sue-A-Quan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:39
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; C; C10; C10G; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
108 words
A process for the selective desulfurization of cracked naphthas, which process comprises contacting a cracked naphtha comprising paraffins, naphthenes, aromatics, and unsaturates in a reaction zone under hydrodesulfurization conditions and in the presence of hydrogen with a catalyst to furnish a product containing unsaturates and a reduced amount of sulfur, said catalyst comprising a Group VIB metal and a Group VIII metal deposed on a solid support comprising at least 70 wt.% magnesium oxide, and said Group VIB metal and said Group VIII metal being present as a member selected from the group consisting of (1) the elements, (2) their oxides, (3) their sulfides, and (4) mixtures thereof.
Claim 2
Dependent Claim
108 words
A process for the selective desulfurization of cracked naphthas, which process comprises contacting a cracked naphtha comprising paraffins, naphthenes, aromatics, and unsaturates in a reaction zone under hydrodesulfurization conditions and in the presence of hydrogen with a catalyst to furnish a product containing unsaturates and a reduced amount of sulfur, said catalyst comprising a Group VIB metal and a Group VIII metal deposed on a solid support comprising at least 70 wt.% magnesium oxide, and said Group VIB metal and said Group VIII metal being present as a member selected from the group consisting of (1) the elements, (2) their oxides, (3) their sulfides, and (4) mixtures thereof.
Claim 3
Dependent Claim
68 words
The process of claim 1 wherein said Group VIB metal of said catalyst is present in an amount of about 10 wt.% to about 20 wt.% and said Group VIII metal of said catalyst is present in an amount of about 1 wt.% to about 10 wt.%, each amount being based on the total weight of the catalyst and being calculated as the oxide of the respective metal.
Claim 4
Dependent Claim
62 words
The process of claim 1 wherein said hydrodesulfurization conditions comprise a temperature of about 450° F. to about 750° F., a total pressure of about 75 psig to about 600 psig, a hydrogen-to-hydrocarbon ratio of about 200 SCFB to about 5,000 SCFB, and a WHSV of about 1 to about 15 weight units of hydrocarbon per hour per weight unit of catalyst.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said support includes catalytically active alumina.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein said catalyst comprises a support consisting essentially of magnesium oxide.
Claim 7
Dependent Claim
22 words
The process of claim 2 wherein said Group VIB metal of said catalyst is molybdenum and said Group VIII metal is cobalt.
Claim 8
Dependent Claim
12 words
The process of claim 2 wherein said support includes catalytically active alumina.
Claim 9
Dependent Claim
25 words
The process of claim 3 wherein said hydrodesulfurization conditions are regulated so that total vaporization of reactants and products is present in said reaction zone.
Claim 10
Dependent Claim
15 words
The process of claim 3 wherein the hydrogen partial pressure is at least 60 psia.
Claim 11
Dependent Claim
68 words
The process of claim 5 wherein said Group VIB metal of said catalyst is present in an amount of about 10 wt.% to about 20 wt.% and said Group VIII metal of said catalyst is present in an amount of about 1 wt.% to about 10 wt.%, each amount being based on the total weight of the catalyst and being calculated as the oxide of the respective metal.
Claim 12
Dependent Claim
12 words
The process of claim 6 wherein said support includes catalytically active alumina.
Claim 13
Dependent Claim
15 words
The process of claim 8 wherein the hydrogen partial pressure is at least 60 psia.
Claim 14
Dependent Claim
22 words
The process of claim 10 wherein said Group VIB metal of said catalyst is molybdenum and said Group VIII metal is cobalt.
Claim 15
Dependent Claim
62 words
The process of claim 11 wherein said hydrodesulfurization conditions comprise a temperature of about 450° F. to about 750° F., a total pressure of about 75 psig to about 600 psig, a hydrogen-to-hydrocarbon ratio of about 200 SCFB to about 5,000 SCFB, and a WHSV of about 1 to about 15 weight units of hydrocarbon per hour per weight unit of catalyst.
Claim 16
Dependent Claim
24 words
The process of claim 11 wherein said support comprises alumina and at least 86 wt.% magnesium oxide, based on the weight of said support.
Claim 17
Dependent Claim
25 words
The process of claim 14 wherein said hydrodesulfurization conditions are regulated so that total vaporization of reactants and products is present in said reaction zone.
Claim 18
Dependent Claim
121 words
A process for the selective desulfurization of cracked naphthas, which process consists essentially of contacting a cracked naphtha comprising paraffins, naphthenes, aromatics, and unsaturates in a reaction zone under hydrodesulfurization conditions and in the presence of hydrogen with a catalyst to furnish a product containing unsaturates and a reduced amount of sulfur, said catalyst comprising a Group VIB metal and a Group VIII metal deposed on a solid support comprising catalytically active alumina and at least 70 wt.% magnesium oxide, based on the weight of said support, and said Group VIB metal and said Group VIII metal being present as a member selected from the group consisting of (1) the elements, (2) their oxides, (3) their sulfides, and (4) mixtures thereof.
Claim 19
Dependent Claim
121 words
A process for the selective desulfurization of cracked naphthas, which process consists essentially of contacting a cracked naphtha comprising paraffins, naphthenes, aromatics, and unsaturates in a reaction zone under hydrodesulfurization conditions and in the presence of hydrogen with a catalyst to furnish a product containing unsaturates and a reduced amount of sulfur, said catalyst comprising a Group VIB metal and a Group VIII metal deposed on a solid support comprising catalytically active alumina and at least 70 wt.% magnesium oxide, based on the weight of said support, and said Group VIB metal and said Group VIII metal being present as a member selected from the group consisting of (1) the elements, (2) their oxides, (3) their sulfides, and (4) mixtures thereof.
Claim 20
Dependent Claim
68 words
The process of claim 17 wherein said Group VIB metal of said catalyst is present in an amount of about 10 wt.% to about 20 wt.% and said Group VIII metal of said catalyst is present in an amount of about 1 wt.% to about 10 wt.%, each amount being based on the total weight of the catalyst and being calculated as the oxide of the respective metal.
Claim 21
Dependent Claim
24 words
The process of claim 17 wherein said support comprises alumina and at least 86 wt.% magnesium oxide, based on the weight of said support.
Claim 22
Dependent Claim
62 words
The process of claim 17 wherein said hydrodesulfurization conditions comprise a temperature of about 450° F. to about 750° F., a total pressure of about 75 psig to about 600 psig, a hydrogen-to-hydrocarbon ratio of about 200 SCFB to about 5,000 SCFB, and a WHSV of about 1 to about 15 weight units of hydrocarbon per hour per weight unit of catalyst.
Claim 23
Dependent Claim
22 words
The process of claim 18 wherein said Group VIB metal of said catalyst is molybdenum and said Group VIII metal is cobalt.
Claim 24
Dependent Claim
68 words
The process of claim 19 wherein said Group VIB metal of said catalyst is present in an amount of about 10 wt.% to about 20 wt.% and said Group VIII metal of said catalyst is present in an amount of about 1 wt.% to about 10 wt.%, each amount being based on the total weight of the catalyst and being calculated as the oxide of the respective metal.
Claim 25
Dependent Claim
62 words
The process of claim 21 wherein said hydrodesulfurization conditions comprise a temperature of about 450° F. to about 750° F., a total pressure of about 75 psig to about 600 psig, a hydrogen-to-hydrocarbon ratio of about 200 SCFB to about 5,000 SCFB, and a WHSV of about 1 to about 15 weight units of hydrocarbon per hour per weight unit of catalyst.
Claim 26
Dependent Claim
22 words
The process of claim 22 wherein said Group VIB metal of said catalyst is molybdenum and said Group VIII metal is cobalt.
Claim 27
Dependent Claim
25 words
The process of claim 23 wherein said hydrodesulfurization conditions are regulated so that total vaporization of reactants and products is present is said reaction zone.
Claim 28
Dependent Claim
15 words
The process of claim 23 wherein the hydrogen partial pressure is at least 60 psia.
Claim 29
Dependent Claim
62 words
The process of claim 24 wherein said hydrodesulfurization conditions comprise a temperature of about 450° F. to about 750° F., a total pressure of about 75 psig to about 600 psig, a hydrogen-to-hydrocarbon ratio of about 200 SCFB to about 5,000 SCFB, and a WHSV of about 1 to about 15 weight units of hydrocarbon per hour per weight unit of catalyst.
Claim 30
Dependent Claim
15 words
The process of claim 25 wherein the hydrogen partial pressure is at least 60 psia.
Claim 31
Dependent Claim
15 words
The process of claim 25 wherein the hydrogen partial pressure is at least 80 psia.
Claim 32
Dependent Claim
25 words
The process of claim 27 wherein said hydrodesulfurization conditions are regulated so that total vaporization of reactants and products is present in said reaction zone.
Claim 33
Dependent Claim
15 words
The process of claim 27 wherein the hydrogen partial pressure is at least 60 psia.
Claim 34
Dependent Claim
15 words
The process of claim 30 wherein the hydrogen partial pressure is at least 60 psia.
Claim 35
Dependent Claim
15 words
The process of claim 30 wherein the hydrogen partial pressure is at least 80 psia.
Claim 36
Dependent Claim
62 words
The process of claim 13 wherein said hydrodesulfurization conditions comprise a temperature of about 450° F. to about 750° F., a total pressure of about 75 psig to about 600 psig, a hydrogen-to-hydrocarbon ratio of about 200 SCFB to about 5,000 SCFB, and a WHSV of about 1 to about 15 weight units of hydrocarbon per hour per weight unit of catalyst.
Claim 37
Dependent Claim
25 words
The process of claim 34 wherein said hydrodesulfurization conditions are regulated so that total vaporization of reactants and products is present in said reaction zone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |