US3770618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodesulfurization of residua
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-03-20
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Granted: 1973-11-06
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Expires: 1992-03-20
Abstract
Abstract A process for the hydrodesulfurization of residua. A residuum is contacted with a high activity maintenance catalyst comprising an oxide or sulfide of cobalt or nickel and an oxide or sulfide of molybdenum or tungsten deposited on a silica-stabilized alumina support, having a maximum of its surface area in pores having 30 to 80 A diameters. A preferred catalyst is characterized as one having at least 180 M2/g. of surface area in pores with diameters ranging from 30 to 80 A, and less than 0.25 cc./g. of the pore volume in pores having a diameter greater than 100 A.
Inventors
- 👤 C Adams
- 👤 W House
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:31
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882; B01J35/00; B01J35/30; B01J35/31; B01J35/32; B01J35/60; B01J35/61; B01J35/615; B01J35/63; B01J35/633; B01J35/635; B01J35/64; B01J35/647; B01J2235/00; C; C10; C10G; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
24 words
The process of claim 1 wherein the petroleum residuum feed is one in which 30 - 100 percent of the feed boils above 900*F.
Claim 2
Dependent Claim
21 words
The process of claim 1 wherein the silica content of the alumina-silica composition ranges from about 1.5 - 5 weight percent.
Claim 3
Dependent Claim
55 words
The process of claim 1 wherein the Group VIB oxide or sulfide is selected from the group consisting of molybdenum oxide, molybdenum sulfide, tungsten oxide, tungsten sulfide, and mixtures thereof, and the Group VIII oxide or sulfide is selected from the group consisting of nickel oxide, cobalt oxide, nickel sulfide, cobalt sulfide, and mixtures thereof.
Claim 4
Dependent Claim
39 words
The process of claim 4 wherein the oxide or sulfide of the Group VIB metal and Group VIII metal comprises a mixture selected from the group consisting of nickel oxide with molybdenum oxide and cobalt oxide with molybdenum oxide.
Claim 5
Dependent Claim
137 words
A process for the hydrodesulfurization of a hydrocarbon residuum feed comprising contacting said residuum with a catalyst at a temperature ranging from 500*F. to about 825*F., a pressure of from 200 to about 2,500 psig and hydrogen at a rate of 300 to about 10,000 standard cubic feet per barrel (SCF/B), at a space velocity of from 0.01 to about 5.0 V/V/Hr., said catalyst comprising the oxide or sulfide of a Group VIB metal and the oxide or sulfide of a Group VIII metal deposited upon a support material comprising a silica-stabilized alumina containing 0.5-6 weight percent of silica, said catalyst having at least 180 M2/g. of surface area in pores with diameters ranging from 30 to 80 A, and less than 0.25 cc./g. of the pore volume in pores having a diameter greater than 100 A.
Claim 6
Dependent Claim
24 words
The process of claim 6 wherein the hydrocarbon residuum feed is one in which 30 - 100 percent of the feed boils above 900*F.
Claim 7
Dependent Claim
31 words
The process of claim 6 wherein the conditions of operation are as follows: Temperature, *F - 650-800 Pressure, Psig - 500-1,800 Space Velocity, V/V/Hr. - 0.1-2.0 Hydrogen Rate, SCF/Bb1 - 1,000-7,500
Claim 8
Dependent Claim
55 words
The process of claim 6 wherein the Group VIB oxide or sulfide is selected from the group consisting of molybdenum oxide, molybdenum sulfide, tungsten oxide, tungsten sulfide, and mixtures thereof, and the Group VIII oxide or sulfide is selected from the group consisting of nickel oxide, cobalt oxide, nickel sulfide, cobalt sulfide, and mixtures thereof.
Claim 9
Dependent Claim
39 words
The process of claim 9 wherein the oxide or sulfide of the Group VIB metal and Group VIII metal comprises a mixture selected from the group consising of nickel oxide with molybdenum oxide and cobalt oxide with molybdenum oxide.
Claim 10
Dependent Claim
37 words
The process of claim 9 wherein the concentrations of the catalytic metals, expressed as the oxide, is as follows: Nickel or Cobalt - 1 - 15 wt. % Tungsten or Molybdenum - 5 - 25 wt. %
Claim 11
Dependent Claim
27 words
The process of claim 11 wherein the concentration of nickel or cobalt and tungsten or molybdenum ranges 2 - 10 and 10 - 20 weight percent, respectively.
Claim 12
Dependent Claim
15 words
The process of claim 6 wherein the silica ranges from 1 - 5 weight percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |