US4329150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for control and optimization of pyrolysis furnace with multiple parallel passes
Assignee: Mobil Oil AS
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Filing: 1980-12-11
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Granted: 1982-05-11
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Expires: 2000-12-11
Abstract
Abstract An improved method and apparatus for control of a multi-pass pyrolysis furnace, e.g. for the pyrolysis of hydrocarbon feed to produce an effluent with a high ethylene content is disclosed. The method which is suitable for computer control involves the analysis of the effluent from each pass and controlling pyrolysis conditions in each pass in response to the analysis of the output from that pass. Improved optimization is possible over methods which depend on average analysis from several passes because of the wide variations which occur in cracking conditions in several passes.
Inventors
- 👤 B. M. Drinkard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/04; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; C10G9/206
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
In a process for the pyrolysis of a feedstock in a pyrolysis furnace with multiple parallel passes which is controlled responsive to analysis of output, the improvement comprising analyzing the output at each of a plurality of said passes and individually controlling conditions in each of said plurality of passes responsive to the analysis of output of each respective pass.
Claim 2
Dependent Claim
60 words
In a process for the pyrolysis of a feedstock in a pyrolysis furnace with multiple parallel passes which is controlled responsive to analysis of output, the improvement comprising analyzing the output at each of a plurality of said passes and individually controlling conditions in each of said plurality of passes responsive to the analysis of output of each respective pass.
Claim 3
Dependent Claim
13 words
The process of claim 1 in which the pyrolysis furnace is computer controlled.
Claim 4
Dependent Claim
19 words
The process of claim 1 in which includes control of fuel and pyrolysis temperature responsive to furnace output analysis.
Claim 5
Dependent Claim
15 words
The process of claim 1 which includes control of feedstock responsive to furnace output analysis.
Claim 6
Dependent Claim
26 words
The process of claim 1 in which a feedstock comprising C 2 and higher hydrocarbons and steam is pyrolyzed to a produce a product comprising ethylene.
Claim 7
Dependent Claim
20 words
The process of claim 1 in which the feedstock is analyzed and the measurement is used to control pyrolysis conditions.
Claim 8
Independent Claim
56 words
An apparatus comprising, in combination, a pyrolysis furnace having a plurality of parallel passes, means for heating the plurality of parallel passes by combustion of a fuel whose flow is controllable, means for feeding one or more feedstock streams into said parallel passes and separate means for analysis of the effluent of each said parallel passes.
Claim 9
Independent Claim
56 words
An apparatus comprising, in combination, a pyrolysis furnace having a plurality of parallel passes, means for heating the plurality of parallel passes by combustion of a fuel whose flow is controllable, means for feeding one or more feedstock streams into said parallel passes and separate means for analysis of the effluent of each said parallel passes.
Claim 10
Dependent Claim
11 words
The apparatus of claim 7 which includes means for feedstock analysis.
Claim 11
Dependent Claim
27 words
The apparatus of claim 7 including means for controlling fuel, feedstock or both separately in each parallel pass in response to analysis of effluent from that pass.
Claim 12
Dependent Claim
11 words
The apparatus of claim 9 which includes means for feedstock analysis.
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) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |