US4227990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal cracking of retort oil
Assignee: Atlantic Richfield Co
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Filing: 1978-11-20
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Granted: 1980-10-14
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Expires: 1998-11-20
Abstract
Abstract The thermal cracking of retort oil vapors in an elongated reactor is improved by passing the effluent oil vapors and gases from a retort to a thermal cracking unit before the temperature of the retort effluent falls below 680° F. This encourages the more desirable cracking reactions, increases the thermal efficiency of the process, and avoids preheater coking.
Inventors
- 👤 James D. Dearth
- 👤 Robert H. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10G1/02; C10G9/00; C10G9/28; C10G9/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A process for thermal cracking retort oil in an elongated reactor comprising: (a) operating a retort for normally solid hydrocarbonaceous materials at a temperature above 700° F., thereby producing carbonaceous gases and oil vapors; (b) passing a mixture of said gases and at least a portion of said oil vapors to said elongated reactor before said mixture has cooled to a temperature below 680° F.; and (c) concurrently flowing said mixture, a gaseous diluent and heat carriers through said elongated reactor at a velocity sufficient to entrain said heat carrier solids, said heat carrier solids being at a reactor inlet temperature of between 1200° F. and 2500° F.
Claim 2
Dependent Claim
108 words
A process for thermal cracking retort oil in an elongated reactor comprising: (a) operating a retort for normally solid hydrocarbonaceous materials at a temperature above 700° F., thereby producing carbonaceous gases and oil vapors; (b) passing a mixture of said gases and at least a portion of said oil vapors to said elongated reactor before said mixture has cooled to a temperature below 680° F.; and (c) concurrently flowing said mixture, a gaseous diluent and heat carriers through said elongated reactor at a velocity sufficient to entrain said heat carrier solids, said heat carrier solids being at a reactor inlet temperature of between 1200° F. and 2500° F.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the hot heat carrier solids are comprised of catalytic solids.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein the hot heat carrier solids are comprised of inert solids.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein the hot heat carrier solids are comprised of a mixture of inert solids and catalytic solids.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein the gaseous diluent is comprised of superheated steam.
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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |