Patent US3767569A successfully refreshed from Google Patents.
US3767569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodesulfurization of hydrocarbon residuum with catalytic oil-slurry and fixed-bed zones
Assignee: Individual
•
Filing: 1971-12-10
•
Granted: 1973-10-23
•
Expires: 1991-12-10
Abstract
Abstract A process for hydrorefining, particularly, hydrodesulfurizing a hydrocarbon feedstock containing relatively high quantities of sulfur, asphaltenes, metals and ash by use of a slurry type of heat treater operated in advance of the hydrodesulfurization reactor. A catalyst is present in the heat treater in an oil slurry wherein the feedstock is desalted and demetallized and then transferred to the main reactor. The system is primarily a sulfur removal operation and hydrocarbon conversion is at a minimum.
Inventors
- 👤 F Mayer
- 👤 K Moritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:49
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/14; C10G45/16; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
33 words
The process of claim 1 wherein said catalyst employed in said preliminary contact zone comprises a combination of oxides and/or sulfides of molybdenum or tungsten with oxides and/or sulfides of nickel or cobalt.
Claim 2
Dependent Claim
32 words
The process of claim 1 wherein said residuum is a petroleum residuum obtained by the atmospheric distillation of oil, said residuum containing a relatively large amount of sulfur, asphaltenes, metals and ash.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the catalyst employed in said preliminary contact zone comprises a combination of oxides and/or sulfides of molybdenum or tungsten with oxides and/or sulfides of nickel or cobalt.
Claim 4
Dependent Claim
39 words
The process of claim 4 wherein the catalyst comprises 5 to 25 weight percent of a sulfide of tungsten or molybdenum and 1 to 15 weight percent of a sulfide of nickel or cobalt deposited on an alumina support.
Claim 5
Dependent Claim
16 words
The process of claim 5 wherein the support contains 1 to 6 weight percent of silica.
Claim 6
Dependent Claim
74 words
The process of claim 1, wherein a portion of the vaporous effluent from the main hydrodesulfurization reaction zone is admixed with the said admixture of residuum and hydrogen prior to the introduction of said admixture to said preliminary contact zone to form a combined preliminary contact zone feed, and the hydrocarbon effluent from said main reaction zone is passed in heat exchange with said combined preliminary contact zone feed thereby preheating said combined feed.
Claim 7
Dependent Claim
24 words
The process of claim 7, wherein said admixture is heated prior to being admixed with said vaporous effluent from the main hydrodesulfurization reaction zone.
Claim 8
Dependent Claim
34 words
The process of claim 1 wherein the amount of catalyst maintained in the preliminary contact zone is less than 10 percent of the weight percent concentration of catalyst contained in the main reaction zone.
Claim 9
Dependent Claim
33 words
The process of claim 9 wherein the weight percent concentration of catalyst in the preliminary contact zone ranges from about 5 to about 8 percent of that contained in the main reaction zone.
Claim 10
Dependent Claim
31 words
The process of claim 9 wherein the superficial liquid mass flow velocity through the main reaction zone ranges from about 2, 000 lbs./hr./ft.2 to about 3,000 lbs./hr./ft.2 of contact zone cross-section.
Claim 11
Dependent Claim
61 words
The process of claim 9 wherein the space velocity (LHSV) of the hydrocarbon residuum feed passing through the preliminary contact zone ranges from about 1 V/Hr./V to about 10 V/Hr./V, and the space velocity (LHSV) of the hydrocarbon residua effluent through the main reaction zone ranges from about 10 to about 40 percent of that employed in the preliminary contact zone.
Claim 12
Dependent Claim
25 words
The pRocess of claim 9 wherein the particle size of the catalyst maintained in said preliminary contact zone is about 1/32 inch particle size diameter.
References Cited (Backward Citations)
US2771401A
Cited
US3297563A
Cited
US3362901A
Cited
US3471398A
Cited
US3530066A
Cited
US3563887A
Cited
US3536607A
Cited
US3663434A
Cited
US3622495A
Cited
US3720602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |