US3859203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of sulfur from residual oil with downstream ammonia addition
Assignee: Gulf Research and Development Co
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Filing: 1974-01-22
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Granted: 1975-01-07
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Expires: 1994-01-22
Abstract
Abstract A process for the hydrodesulfurization of an asphaltic oil comprising passing the oil, hydrogen and added ammonia downwardly through a bed of catalyst comprising Group VI and Group VIII metals on alumina. Quench hydrogen and additional ammonia are added downstream in the catalyst system.
Inventors
- 👤 Louis W Brunn
- 👤 James A Frayer
- 👤 John A Paraskos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:31
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; C10G49/00; C10G49/007
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A PROCESS FOR HYDRODESULFURIZING AN ASPHALTENECONTAINING OIL COMPRISING PASSING SAID OIL AND HYDROGEN DOWNWARDLY AT A TEMPERATURE OF 600* TO 900*F THROUGH A REACTOR CONTAINING A SYSTEM OF SPACED-APART BEDS OF SULFIDED CATALYST COMPRISING GROUP VI AND GROUP VIII MEANS METALS ON ALUMINA, INTRODUCING TEMPERATURE QUENCH HYDROGEN DOWNSTREAM IN SAID CATALYST BED SYSTEM, ADDING AMMONIA TO SAID CATALYST IN SAID BEDS AT RELATIVELY UPSTREAM AND RELATIVELY DOWNSTREAM POSITIONS IN SAID REACTOR, SAID AMMONIA BEING ADDED IN AMOUNTS TO INCREASE HYDRODESULFURIZATION IN SAID PROCESS AS COMPARED TO THE ABSENCE OF SAID AMMONIA, THE AMMONIA CONCENTRATION IN THE REACTOR GASES BEING LOWER THAN THE AVERAGE HYDROGEN SULFIDE CONCENTRATION IN SAID GASES, AND INCREMENTALLY INCREAS-
Claim 2
Dependent Claim
112 words
A PROCESS FOR HYDRODESULFURIZING AN ASPHALTENECONTAINING OIL COMPRISING PASSING SAID OIL AND HYDROGEN DOWNWARDLY AT A TEMPERATURE OF 600* TO 900*F THROUGH A REACTOR CONTAINING A SYSTEM OF SPACED-APART BEDS OF SULFIDED CATALYST COMPRISING GROUP VI AND GROUP VIII MEANS METALS ON ALUMINA, INTRODUCING TEMPERATURE QUENCH HYDROGEN DOWNSTREAM IN SAID CATALYST BED SYSTEM, ADDING AMMONIA TO SAID CATALYST IN SAID BEDS AT RELATIVELY UPSTREAM AND RELATIVELY DOWNSTREAM POSITIONS IN SAID REACTOR, SAID AMMONIA BEING ADDED IN AMOUNTS TO INCREASE HYDRODESULFURIZATION IN SAID PROCESS AS COMPARED TO THE ABSENCE OF SAID AMMONIA, THE AMMONIA CONCENTRATION IN THE REACTOR GASES BEING LOWER THAN THE AVERAGE HYDROGEN SULFIDE CONCENTRATION IN SAID GASES, AND INCREMENTALLY INCREAS-
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein ammonia is added to said catalyst in said beds prior to charging said oil to said reactor within said temperature range.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the ratio of said ammonia to said oil is changed during said process.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the ratio of said ammonia to said oil is changed incrementally prior to said incremental increases in temperature.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said catalyst comprises cobalt and molybdenum.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said catalyst comprises nickel, cobalt and molybdenum.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the pressure is at least 750 psi.
Claim 9
Dependent Claim
26 words
The process of claim 1 wherein less than 20 percent of said oil is converted to material boiling below the initial boiling point of said oil.
Claim 10
Dependent Claim
26 words
The process of claim 1 wherein less than 10 percent of said oil is converted to material boiling below the initial boiling point of said oil.
Claim 11
Dependent Claim
22 words
The process of claim 1 wherein between 150 and 1,500 standard cubic feet of hydrogen per barrel of feed oil are consumed.
Claim 12
Dependent Claim
20 words
The process of claim 1 wherein at least 10 barrels of said oil are charged per pound of said catalyst.
Claim 13
Dependent Claim
20 words
The process of claim 1 wherein said catalyst is presulfided in the presence of hydrogen, ammonia and a sulfur-containing oil.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |