US4071435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Denitrogenation of syncrude
Assignee: Atlantic Richfield Co
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Filing: 1977-06-06
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Granted: 1978-01-31
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Expires: 1997-06-06
Abstract
Abstract A method for reducing the nitrogen content of a syncrude feed obtained from at least one of oil shale, tar sands, and coal wherein the syncrude is mixed with an extractant-catalyst which is effective for extracting nitrogen materials from the syncrude feed and also effective as a hydrocracking catalyst for said syncrude feed. Said mixing helps form a first phase composed of a first low nitrogen syncrude product and a second phase composed of said extractant-catalyst and high nitrogen syncrude feed, separating said first and second phases from one another, and hydrocracking said second phase to produce a second low nitrogen syncrude product.
Inventors
- 👤 Robert H. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:20
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G2400/00; C10G2400/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A method for reducing the nitrogen content of a syncrude feed obtained from at least one of oil shale, tar sands, and coal, comprising a. mixing an extractant-catalyst with said feed, said extractant-catalyst being effective for extracting, nitrogen materials from said syncrude feed and also for serving as a hydrocracking catalyst for said syncrude feed, b. settling the mixture from step (a) into a first phase composed essentially of a first low nitrogen syncrude product, and a second phase composed essentially of said extractant-catalyst and high nitrogen-containing syncrude liquid, c. separating said first and second phases from one another, and d. hydrocracking said second phase to produce a second low nitrogen syncrude product.
Claim 2
Independent Claim
113 words
A method for reducing the nitrogen content of a syncrude feed obtained from at least one of oil shale, tar sands, and coal, comprising a. mixing an extractant-catalyst with said feed, said extractant-catalyst being effective for extracting, nitrogen materials from said syncrude feed and also for serving as a hydrocracking catalyst for said syncrude feed, b. settling the mixture from step (a) into a first phase composed essentially of a first low nitrogen syncrude product, and a second phase composed essentially of said extractant-catalyst and high nitrogen-containing syncrude liquid, c. separating said first and second phases from one another, and d. hydrocracking said second phase to produce a second low nitrogen syncrude product.
Claim 3
Dependent Claim
26 words
The method according to claim 1 wherein said extractant-catalyst is selected from the group consisting of halides of zinc, cadmium, mercury, lead, copper, and mixtures thereof.
Claim 4
Dependent Claim
29 words
The method according to claim 2 wherein said extractant-catalyst is employed in an amount of at least 5 weight percent based on the total weight of said syncrude feed.
Claim 5
Dependent Claim
29 words
The method according to claim 1 wherein said hydrocracking is carried out in the presence of molecular hydrogen at a temperature of from about 650° to about 1000° F.
Claim 6
Dependent Claim
44 words
The method according to claim 1 wherein said second phase is subjected to drying conditions to remove water prior to hydrocracking step (d), said extractant-catalyst is recovered from said hydrocracking step, and said recovered extractant-catalyst is diluted with water for reuse in step (a).
Claim 7
Dependent Claim
12 words
The method according to claim 1 wherein said extractant-catalyst is zinc chloride.
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) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |