US3720602A
Expired / Lapsed
US
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Water injection in a hydrodesulfurization process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1971-02-26
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Granted: 1973-03-13
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Expires: 1991-02-26
Abstract
Abstract Hydrodesulfurization of substantially non-metal containing hydrocarbon feed, such as vacuum gas oils, virgin gas oils and cycle oils, is carried out in a contacting step with hydrogen and a catalyst of a Group VI-B and/or Group VIII metal which also contains 0.1-15 percent be weight of a Group VB metal. Water, in the form of either liquid or vapor, is injected in the desulfurization reaction to effect cooling and to enhance catalyst activity.
Inventors
- 👤 K Riley
- 👤 J Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:06
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
102 words
An improved catalytic hydrodesulfurization process comprising admixing, a substantially non-metal containing sulfur-bearing hydrocarbon feed selected from the group consisting of vacuum gas oils, virgin gas oils, thermal and catalytic cycle oils with hydrogen and contacting said admixture in a reaction zone with a catalyst comprising compounds of the metals of Group VI B and/or Group VIII of the Periodic Table and from about 0.1 to about 15 percent by weight of a Group V B metal, and injecting water into said reaction zone to effect cooling and to enhance catalyst activity thereby substantially reducing the sulfur content of the hydrocarbon feed stream.
Claim 2
Dependent Claim
102 words
An improved catalytic hydrodesulfurization process comprising admixing, a substantially non-metal containing sulfur-bearing hydrocarbon feed selected from the group consisting of vacuum gas oils, virgin gas oils, thermal and catalytic cycle oils with hydrogen and contacting said admixture in a reaction zone with a catalyst comprising compounds of the metals of Group VI B and/or Group VIII of the Periodic Table and from about 0.1 to about 15 percent by weight of a Group V B metal, and injecting water into said reaction zone to effect cooling and to enhance catalyst activity thereby substantially reducing the sulfur content of the hydrocarbon feed stream.
Claim 3
Dependent Claim
27 words
Process as defined in claim 1 wherein the Group V B metal is present in amounts ranging from about 0.5 percent to about 10 percent by weight.
Claim 4
Dependent Claim
31 words
Process as defined in claim 1 wherein the catalyst comprises a mixture of a Group VB metal with cobalt or nickel and with molybdenum supported on a silica stabilized alumina support.
Claim 5
Dependent Claim
14 words
Process as defined in claim 1 wherein the Group V B metal is vanadium.
Claim 6
Dependent Claim
22 words
Process as defined in claim 1 wherein from about 5 percent to about 50 percent water is injected into the reaction zone.
Claim 7
Dependent Claim
18 words
Process as defined in claim 5 wherein the water is injected into the reaction zone as a liquid.
Claim 8
Dependent Claim
18 words
Process as defined in claim 5 wherein the water is injected into the reaction zone as a vapor.
Claim 9
Dependent Claim
96 words
An improved catalytic hydrodesulfurization process comprising admixing a substantially non-metal containing, sulfur-bearing hydrocarbon feed with hydrogen, feeding said admixture to a multi stage reaction zone containing within each stage a catalyst comprising compounds of the metals of Group VI B and/or Group VIII of the Periodic Table and from about 0.1 to about 15 percent by weight of a Group V B metal, injecting water between said stages to effect cooling of the reaction stream and to enhance catalyst activity, and thereafter separating the reaction products to obtain a hydrocarbon stream exhibiting substantially reduced sulfur content.
Claim 10
Dependent Claim
96 words
An improved catalytic hydrodesulfurization process comprising admixing a substantially non-metal containing, sulfur-bearing hydrocarbon feed with hydrogen, feeding said admixture to a multi stage reaction zone containing within each stage a catalyst comprising compounds of the metals of Group VI B and/or Group VIII of the Periodic Table and from about 0.1 to about 15 percent by weight of a Group V B metal, injecting water between said stages to effect cooling of the reaction stream and to enhance catalyst activity, and thereafter separating the reaction products to obtain a hydrocarbon stream exhibiting substantially reduced sulfur content.
Claim 11
Dependent Claim
21 words
Process as defined in claim 8 wherein the pressure within the reaction zone ranges from about 300 to about 3,000 psig.
Claim 12
Dependent Claim
20 words
Process as defined in claim 9 wherein pressure within the reaction zone ranges from about 500 to about 1,000 psig.
Claim 13
Dependent Claim
35 words
Process as defined in claim 8 wherein the temperature within the reaction zone ranges from about 650* to about 800*F. at the start of the run to about 850*F. at the end of the run.
Claim 14
Dependent Claim
36 words
Process as defined in claim 11 wherein the temperature within the reaction zone ranges from about 675* to about 710*F. at the start of the run rising to about 765*F. at the end of the run.
Claim 15
Dependent Claim
27 words
Process as defined in claim 8 wherein the liquid hourly space velocity of the reaction system within the reaction zone ranges from about 0.1 to about 10.
Claim 16
Dependent Claim
19 words
Process as defined in claim 13 wherein the liquid hourly space velocity ranges from about 0.5 to about 2.
Claim 17
Dependent Claim
41 words
Process as defined in claim 8 wherein the hydrogen introduced into the reaction zone is a hydrogen-rich treat gas admixed with the hydrocarbon feed stream, said treat gas contains from about 50 percent to about 90 percent by volume of hydrogen.
Claim 18
Dependent Claim
24 words
Process as defined in claim 15 wherein the hydrogen-rich treat gas stream contains from about 60 percent to about 80 percent hydrogen by volume.
Claim 19
Dependent Claim
25 words
Process as defined in claim 8 wherein from about 5 percent to about 50 percent by volume of water is injected into the reaction zone.
Claim 20
Dependent Claim
25 words
Process as defined in claim 17 wherein from about 10 percent to about 30 percent by volume of water is injected into the 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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |