US4293404A
Expired / Lapsed
US
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Dehydroxylation and/or demercaptolation of heavy petroleum oils
Assignee: Mobil Oil AS
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Filing: 1980-07-21
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Granted: 1981-10-06
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Expires: 2000-07-21
Abstract
Abstract The phenolic oxygen and/or the thiol sulfur present in the polycyclic aromatic compounds in a heavy oil, such as vacuum pipestill bottoms, crude oil, reduced crude, residual oil or tar sands oil, can be removed as H2O and/or H2S by contacting the heavy oil with a hydrogen donor at an elevated temperature in the presence of a specified catalyst.
Inventors
- 👤 Malvina Farcasiu
- 👤 Darrell D. Whitehurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:46
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/44; C10G45/46; C10G45/48; C10G45/50
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
68 words
A process for removing phenolic oxygen and/or thiol sulfur from heavy petroleum oils which comprises: (a) contacting heavy petroleum oils containing polycyclic hydroxy and/or thio aromatic compounds with effective amounts of a hydrogen donor, and a catalyst of an iron-containing porous solid, coal or coal liquefaction residue, (b) heating the mixture of (a) at elevated temperatures to evolve H 2 O and/or H 2 S from said mixture.
Claim 2
Dependent Claim
68 words
A process for removing phenolic oxygen and/or thiol sulfur from heavy petroleum oils which comprises: (a) contacting heavy petroleum oils containing polycyclic hydroxy and/or thio aromatic compounds with effective amounts of a hydrogen donor, and a catalyst of an iron-containing porous solid, coal or coal liquefaction residue, (b) heating the mixture of (a) at elevated temperatures to evolve H 2 O and/or H 2 S from said mixture.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein the iron-containing porous solid is iron pyrites, fly ash, bauxite, red mud or manganese nodules.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein the heavy petroleum oil is vacuum pipestill bottoms, crude oil, reduced crude or residual oil.
Claim 5
Dependent Claim
15 words
A process according to claim 1 wherein the heavy petroleum oil is tar sands oil.
Claim 6
Dependent Claim
27 words
A process according to claim 4 wherein the tar sands oil comprises polar compounds recovered from tar sands by a double extraction process employing naphtha and methanol.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein the heavy petroleum oil is the feed to a coking unit.
Claim 8
Dependent Claim
17 words
A process according to claim 6 wherein the feed is deasphalted tar, reduced crude or heavy resid.
Claim 9
Dependent Claim
15 words
A process according to claim 1 carried out in the presence of added gaseous hydrogen.
Claim 10
Dependent Claim
15 words
A process according to claim 1 wherein the hydrogen donor comprises tetrahydronaphthalene, or derivatives thereof.
Claim 11
Dependent Claim
15 words
A process according to claim 1 wherein the elevated temperature is 600° to 900° F.
Claim 12
Dependent Claim
15 words
A process according to claim 1 wherein the elevated temperature is 700° to 900° F.
Claim 13
Dependent Claim
30 words
A process according to claim 10 including the following additional process conditions: the presence of hydrogen a pressure of 0 to 2500 psig and a LHSV of 0.5 to 10.
Claim 14
Dependent Claim
30 words
A process according to claim 11 including the following additional process conditions: the presence of hydrogen a pressure of 0 to 250 psig and a LHSV of 0.5 to 10.
Claim 15
Dependent Claim
19 words
A process according to claim 1 wherein the effective amount of hydrogen donor is 10 to 40% tetralin equivalent.
Claim 16
Dependent Claim
19 words
A process according to claim 14 wherein the effective amount of hydrogen donor is 20 to 30% tetralin equivalent.
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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |