US3878088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated production of olefins and coke
Assignee: Individual
•
Filing: 1974-03-04
•
Granted: 1975-04-15
•
Expires: 1994-03-04
Abstract
Abstract An integrated process for production of olefins and coke from an effluent from a pyrolysis furnace, in which a common fractionator is used to both fractionate the pyrolysis products and prefractionate hydrocarbon fractions for introduction into a coking apparatus. Coke drum overhead vapors are introduced into the pyrolysis effluent to serve as flux for a circulating quench fluid stream.
Inventors
- 👤 Robert S Nahas
- 👤 Andre Armand Simone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:04
CPC Classifications
C; C10; C10B; C10B55/00; C10G; C10G9/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A PROCESS FOR PRODUCING OF OLEFINS AND COKE FROM A HYDROCARBON FEEDSTOCK COMPRISING: A. CRACKING THE HYDROCARBON IN THE PRESENCE OF STEAM TO PRODUCE AGASEOUS EFFLUENT; B. QUENCING THE GASEOUS EFFLUENT BY CONTACTING IT WITH A HYDROCARBON QUENCH FLUID; C. INTRODUCING COKE DRUM VAPORS INTO THE QUENCHED GASEOUS EFFLUENT FROM STEP (B); D. SEPARATING THE PRODUCT OF (C) INTO (I) AN OVERHEAD FRACTION COMPRISING GASOLINE AND LIGHTER HYDROCARBONS, (II) A MIDDLE FRACTION HAVING A BOILING RANGE OF ABOUT 360*F TO ABOUT 600*F. AND (III) A BOTTOMS FRACTION HAVING A BOILING RANGE OF ABOVE ABOUT 600*F; E. RECYCLING A PORTION OF THE BOTOM FRACTION OF (D) TO SERVE AS THE HYDROCARBON QUENCH FLUID IN STEP (B); F. RECOVERING OLEFINS FROM THE OVERHEAD FRACTION OF (D); G. SUBJECTING ANOTHER PORTION OF THE BOTTOMS FRACTION OF (D) TO A DELAYED COKING OPERATION, INCLUDING COKE DRUMS; AND H INTRODUCING OVERHEAD VAPORS FROM THE COKE DRUMS INTO STEP (C9.
Claim 2
Dependent Claim
154 words
A PROCESS FOR PRODUCING OF OLEFINS AND COKE FROM A HYDROCARBON FEEDSTOCK COMPRISING: A. CRACKING THE HYDROCARBON IN THE PRESENCE OF STEAM TO PRODUCE AGASEOUS EFFLUENT; B. QUENCING THE GASEOUS EFFLUENT BY CONTACTING IT WITH A HYDROCARBON QUENCH FLUID; C. INTRODUCING COKE DRUM VAPORS INTO THE QUENCHED GASEOUS EFFLUENT FROM STEP (B); D. SEPARATING THE PRODUCT OF (C) INTO (I) AN OVERHEAD FRACTION COMPRISING GASOLINE AND LIGHTER HYDROCARBONS, (II) A MIDDLE FRACTION HAVING A BOILING RANGE OF ABOUT 360*F TO ABOUT 600*F. AND (III) A BOTTOMS FRACTION HAVING A BOILING RANGE OF ABOVE ABOUT 600*F; E. RECYCLING A PORTION OF THE BOTOM FRACTION OF (D) TO SERVE AS THE HYDROCARBON QUENCH FLUID IN STEP (B); F. RECOVERING OLEFINS FROM THE OVERHEAD FRACTION OF (D); G. SUBJECTING ANOTHER PORTION OF THE BOTTOMS FRACTION OF (D) TO A DELAYED COKING OPERATION, INCLUDING COKE DRUMS; AND H INTRODUCING OVERHEAD VAPORS FROM THE COKE DRUMS INTO STEP (C9.
Claim 3
Dependent Claim
15 words
A process according to claim 1 further comprising recovering the middle fraction from step (d).
Claim 4
Dependent Claim
33 words
A process according to claim 1 in which a portion of the middle fraction from step (d) is combined with the portion of the bottoms fraction subjected to delayed coking in step (g).
Claim 5
Dependent Claim
19 words
A process according to claim 1 further comprising recovering a gasoline fraction from the overhead fraction of step (d).
Claim 6
Dependent Claim
33 words
A process according to claim 1 in which the bottoms fraction of (d) recycled to serve as the hydrocarbon quench fluid is additionally used to generate steam by indirect heat exchange with water.
Claim 7
Dependent Claim
14 words
A process according to claim 1 wherein the hydrocarbon feedstock comprises a gas oil.
Claim 8
Dependent Claim
13 words
A process according to claim 1 wherein the hydrocarbon feedstock comprises a naphtha.
Claim 9
Dependent Claim
13 words
A process according to claim 1 wherein premium electrode grade coke is produced.
References Cited (Backward Citations)
US2126229A
Cited
US2347805A
Cited
US2316334A
Cited
US2406313A
Cited
US2852439A
Cited
US3498906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |