Patent US4085034A successfully refreshed from Google Patents.
US4085034A
Expired / Lapsed
US
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Method for the thermal cracking of heavy hydrocarbon
Assignee: Kureha Corp
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Filing: 1976-10-14
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Granted: 1978-04-18
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Expires: 1996-10-14
Abstract
Abstract In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor, a portion of the content material in the reactor is taken out and injected back into the reactor according to a specific procedure to form a "wet wall" or liquid curtain on the inner peripheral wall of the reactor, thereby preventing coking in the reactor.
Inventors
- 👤 Tomizo Endo
- 👤 Yutaka Sumida
- 👤 Toru Kawahara
- 👤 Masaichi Ohtake
- 👤 Shoichi Motokawa
- 👤 Keiji Nagayama
- 👤 Masatomo Shigeta
- 👤 Hiroshi Hozuma
- 👤 Masaharu Tomizawa
- 👤 Hideo Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:56
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/34; C10G9/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor by direct contact with a heating medium, the improvement comprising the steps of: (a) removing a portion of the reactor contents from a lower section of the reactor; and (b) injecting said portion into an annular recess provided around the circumference of the upper interior of the reactor in a direction tangential to the inner cylindrical wall of the reactor from a plurality of points on the wall, thereby filling the annular recess by centrifugal force and forming a liquid curtain over the cylindrical wall surface of the reactor below the injection point.
Claim 2
Dependent Claim
108 words
In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor by direct contact with a heating medium, the improvement comprising the steps of: (a) removing a portion of the reactor contents from a lower section of the reactor; and (b) injecting said portion into an annular recess provided around the circumference of the upper interior of the reactor in a direction tangential to the inner cylindrical wall of the reactor from a plurality of points on the wall, thereby filling the annular recess by centrifugal force and forming a liquid curtain over the cylindrical wall surface of the reactor below the injection point.
Claim 3
Dependent Claim
37 words
The method according to claim 1, wherein the injection rate of said portion is within the range of 5 to 20 m 3 /hour per 1 m of the circumferential length of the cross-section of said reactor.
Claim 4
Dependent Claim
16 words
The process of claim 1 additionally comprising cooling said portion prior to injection into the reactor.
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |