US4303497A
Expired / Lapsed
US
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Desulfurization, demetalation and denitrogenation of coal
Assignee: Mobil Oil AS
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Filing: 1980-04-21
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Granted: 1981-12-01
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Expires: 2000-04-21
Abstract
Abstract The specification discloses a desulfurization, demetalation and denitrogenation process for coal and coal liquid charge stocks. The process comprises contacting the charge stock in the absence of externally added hydrogen with a hydrogen donor solvent in the presence of a catalytic amount of naturally occurring porous metal ores such as manganese nodules, bog iron, bog manganese, nickel laterites, bauxite or spent bauxite.
Inventors
- 👤 Thomas O. Mitchell
- 👤 Darrell D. Whitehurst
- 👤 Malvina Farcasiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:58
CPC Classifications
C; C10; C10G; C10G1/00; C10G21/00; C10G21/06; C10G21/12; C10G21/14; C10G29/00; C10G29/16; C10G45/00; C10G45/02; C10G45/24; C10G45/28; C10L; C10L9/00; C10L9/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
A process for the desulfurization, demetalation and denitrogenation of coal or coal liquid charge stocks containing sulfur impurities which comprises contacting said charge stock in the absence of added hydrogen with a hydrogen donor solvent and with a catalyst comprising a naturally occurring porous metal ore selected from the group consisting of manganese nodules, bog iron, bog manganese, and nickel laterites.
Claim 2
Dependent Claim
61 words
A process for the desulfurization, demetalation and denitrogenation of coal or coal liquid charge stocks containing sulfur impurities which comprises contacting said charge stock in the absence of added hydrogen with a hydrogen donor solvent and with a catalyst comprising a naturally occurring porous metal ore selected from the group consisting of manganese nodules, bog iron, bog manganese, and nickel laterites.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the porous metal ore is bog iron.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the porous metal ore is bog manganese.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the porous metal ore is nickel laterites.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the porous metal ore is the underwater deposit known as manganese nodules.
Claim 7
Dependent Claim
24 words
The process of claims 2, 3, 4, or 5 wherein the the porous metal ore has been subjected to pretreatment by leaching or sulfiding.
Claim 8
Dependent Claim
48 words
The process of claim 5 wherein the manganese nodules have been washed with water having a temperature of at least 125° F. and a total salts content of not more than 1000 parts per million for a time sufficient to increase the accessible surface area of the nodules.
Claim 9
Dependent Claim
38 words
The process of claim 5 wherein said catalyst is a manganese nodule which contains copper, nickel or molybdenum in its composition and which has had at least a portion of its copper, nickel or molybdenum content removed therefrom.
Claim 10
Dependent Claim
35 words
The process of claim 8 wherein said at least a portion of its copper or nickel content has been removed from said manganese nodule by leaching said manganese nodule with an aqueous solution of acid.
Claim 11
Dependent Claim
34 words
The process of claim 8 wherein said at least a portion of its molybdenum content has been removed from said manganese nodule by leaching said manganese nodule with an aqueous solution of a base.
Claim 12
Dependent Claim
19 words
The process of claim 10 wherein said aqueous solution of a base has a pH of at least 8.
Claim 13
Dependent Claim
19 words
The process of claim 10 wherein said aqueous solution of a base has a pH of at least 10.
References Cited (Backward Citations)
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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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |