US3920537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for on-stream decoking of vapor lines
Assignee: Toscopetro Corp
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Filing: 1974-06-05
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Granted: 1975-11-18
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Expires: 1994-06-05
Abstract
Abstract Coke deposited in hydrocarbon vapor conduits as the result of hydrocarbon cracking operations is removed from the conduits without interrupting the cracking operation by periodically contacting the coke deposit with a jet of relatively cold high pressure water. The water is jetted against the coke deposit and in an amount sufficient to thermally shock and break up the coke deposit at a pressure in excess of about 5,000 psig.
Inventors
- 👤 John H Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16; C10B; C10B43/00; C10B43/02; C10B43/08; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A PROCESS OF REMOVING COKE DEPOSITS FROM HYDROCARBON VAPOR CONDUITS WHILE CONTINUOUSLY PASSING HYDROCARBON VAPORS THROUGH THE CONDUIT WHICH COMPRISES CONTACTING THE COKE DEPOSIT WITH A JET OF RELATIVELY HIGH PRESSURE WATER, SAID WATER BEING JETTED AT A PRESSURE IN EXCESS OF ABOUT 5,000 PSI, AND AT A RATE SUFFICIENT TO THERMALLY SHOCK THE CONTACTED COKE DEPOSIT, WHEREBY THE CONTACTED COKE IS BROKEN INTO PIECES AND BLOWN FROM THE CONDUIT.
Claim 2
Dependent Claim
70 words
A PROCESS OF REMOVING COKE DEPOSITS FROM HYDROCARBON VAPOR CONDUITS WHILE CONTINUOUSLY PASSING HYDROCARBON VAPORS THROUGH THE CONDUIT WHICH COMPRISES CONTACTING THE COKE DEPOSIT WITH A JET OF RELATIVELY HIGH PRESSURE WATER, SAID WATER BEING JETTED AT A PRESSURE IN EXCESS OF ABOUT 5,000 PSI, AND AT A RATE SUFFICIENT TO THERMALLY SHOCK THE CONTACTED COKE DEPOSIT, WHEREBY THE CONTACTED COKE IS BROKEN INTO PIECES AND BLOWN FROM THE CONDUIT.
Claim 3
Dependent Claim
23 words
The process as defined by claIm 1 wherein the water is jetted at a pressure of from about 6,000 to about 7,000 psi.
Claim 4
Dependent Claim
22 words
The process as defined by claim 1 wherein the water is jetted at a temperature of from about 50*F. to about 70*F.
Claim 5
Dependent Claim
25 words
The process as defined by claim 1 wherein the water is jetted at a rate of from about 30 to about 40 gallons per minute.
Claim 6
Dependent Claim
47 words
The process as defined by claim 1 wherein the water is jetted at a pressure of from about 6,000 to about 7,000 psi, at a temperature of from about 50*F. to about 70*F. and at a rate of from about 30 to about 40 gallons per minute.
Claim 7
Dependent Claim
29 words
The process as defined by claim 1 wherein the water is jetted at a pressure of about 6,500 psi and at a rate of about 35 gallons per minute.
Claim 8
Dependent Claim
31 words
The process as defined by claim 1 wherein the water is jetted at a pressure of at least about 5,500 psi and at a rate of about 35 gallons per minute.
Claim 9
Dependent Claim
21 words
The process as defined by claim 1 wherein the hydrocarbon vapor conduit is the cyclone discharge nozzle of a fluid coker.
Claim 10
Dependent Claim
56 words
The process as defined by claim 1 wherein the water is jetted into the cyclone discharge nozzle of a fluid coker at a pressure of from about 6,000 to about 7,000 psi, at a temperature of from about 50*F. to about 70*F. and at a rate of from about 30 to about 40 gallons per minute.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |