US4356079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Denitrification of hydrocarbon feedstock
Assignee: Mobil Oil AS
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Filing: 1980-06-04
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Granted: 1982-10-26
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Expires: 2000-06-04
Abstract
Abstract This invention provides a method for reducing the nitrogen content of a heavy hydrocarbonaceous feedstock, which involves contacting the feedstock with hydrogen and water in the presence of a hydrogenation catalyst and a steam stable acidic zeolite catalyst. The invention process is applicable to the denitrification of raw coal, and syncrude feed derived from oil shale and tar sands.
Inventors
- 👤 Ralph M. Desaau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:32
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/02; C10G; C10G1/00; C10G1/08; C10G1/083; C10G1/086; C10G45/00; C10G45/02; C10G45/04; C10G45/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
66 words
A process for denitrification of a heavy hydrocarbon feedstock having a boiling range above about 400° F. which comprises hydrofining the feedstock at a temperature between about 500° F. and 850° F. in the presence of between about 0.1 and 5 weight percent of water, based on the weight of feedstock, and in contact with an acidic zeolite catalyst having a metallic hydrogenation component incorporated therein.
Claim 2
Dependent Claim
66 words
A process for denitrification of a heavy hydrocarbon feedstock having a boiling range above about 400° F. which comprises hydrofining the feedstock at a temperature between about 500° F. and 850° F. in the presence of between about 0.1 and 5 weight percent of water, based on the weight of feedstock, and in contact with an acidic zeolite catalyst having a metallic hydrogenation component incorporated therein.
Claim 3
Dependent Claim
16 words
A process in accordance with claim 1 wherein the feedstock is a petroleum refinery residuum fraction.
Claim 4
Dependent Claim
24 words
A process in accordance with claim 1 wherein the feedstock is a heavy hydrocarbon mixture derived from oil shale, tar sands or coal liquefaction.
Claim 5
Dependent Claim
22 words
A process in accordance with claim 1 wherein the hydrofining is conducted with a hydrogen/feedstock ratio between about 500 and 10,000 s.c.f./barrel.
Claim 6
Dependent Claim
21 words
A process in accordance with claim 1 wherein the hydrofining is conducted at a pressure between about 500 and 3000 psig.
Claim 7
Dependent Claim
23 words
A process in accordance with claim 1 wherein the catalyst is a steam stable acidic zeolite having a silica/alumina ratio above about 10.
Claim 8
Dependent Claim
28 words
A process in accordance with claim 1 wherein the catalyst is a steam stable acidic zeolite having an alpha value in the range between about 1 and 1000.
Claim 9
Dependent Claim
37 words
A process in accordance with claim 1 wherein the catalyst is a steam stable acidic zeolite having incorporated therein a metallic hydrogenation component selected from the group consisting of Group VB, Group VIB and Group VIII metals.
Claim 10
Dependent Claim
25 words
A process in accordance with claim 1 wherein the nitrogen content of the feedstock is reduced by at least 40 percent under the hydrofining conditions.
Claim 11
Dependent Claim
93 words
A process for denitrification of raw coal which comprises (1) admixing comminuted raw coal with a petroleum refinery residuum solvent to form a slurry, and (2) heating the slurry at a temperature between about 500° F. and 850° F. for a period of time between about 0.5 and 3 hours, in the presence of hydrogen and between about 0.1 and 20 weight percent of water, based on the combined weight of raw coal and residuum solvent, and in contact with a steam stable acidic zeolite catalyst having a metallic hydrogenation component incorporated therein.
Claim 12
Dependent Claim
93 words
A process for denitrification of raw coal which comprises (1) admixing comminuted raw coal with a petroleum refinery residuum solvent to form a slurry, and (2) heating the slurry at a temperature between about 500° F. and 850° F. for a period of time between about 0.5 and 3 hours, in the presence of hydrogen and between about 0.1 and 20 weight percent of water, based on the combined weight of raw coal and residuum solvent, and in contact with a steam stable acidic zeolite catalyst having a metallic hydrogenation component incorporated therein.
Claim 13
Dependent Claim
31 words
A process in accordance with claim 10 wherein the residuum solvent and the coal are admixed in a weight ratio between about 0.5 and 5 and 1 of solvent to coal.
Claim 14
Dependent Claim
22 words
A process in accordance with claim 10 wherein the residuum solvent is selected from FCC main column bottoms and TCC syntower bottoms.
Claim 15
Dependent Claim
27 words
A process in accordance with claim 12 wherein the ratio of hydrogen to the combined weight of coal and solvent is between about 1000 and 20,000 s.c.f./ton.
Claim 16
Dependent Claim
21 words
A process in accordance with claim 10 wherein the denitrification is conducted at a pressure between about 500 and 5000 psig.
Claim 17
Dependent Claim
23 words
A process in accordance with claim 10 wherein the catalyst is a steam stable acidic zeolite having a silica/alumina ratio above about 10.
Claim 18
Dependent Claim
28 words
A process in accordance with claim 10 wherein the catalyst is a steam stable acidic zeolite having an alpha value in the range between about 1 and 1000.
Claim 19
Dependent Claim
47 words
A process for denitrification of coal which comprises (1) admixing comminuted coal with a liquefaction solvent, and (2) contacting the admixture with hydrogen and water at a temperature between about 500° F. and 850° F. in the presence of a hydrogenation catalyst and an acidic zeolite catalyst.
Claim 20
Dependent Claim
47 words
A process for denitrification of coal which comprises (1) admixing comminuted coal with a liquefaction solvent, and (2) contacting the admixture with hydrogen and water at a temperature between about 500° F. and 850° F. in the presence of a hydrogenation catalyst and an acidic zeolite catalyst.
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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |